HK1167884A - Light source device, illuminating device, backlight device, liquid crystal display device, and display device - Google Patents

Description

Light source device, illumination device, backlight device, liquid crystal display device, and display device

Technical Field

The present invention relates to a light source device, an illumination device, a backlight device, and a display device for displaying an image, each of which includes a light emitting element.

Background

A so-called thin liquid crystal display device such as a liquid crystal television includes a display portion having a substantially rectangular parallelepiped front surface with a display surface for displaying an image, and a light source device disposed on the back surface side of the display portion for irradiating the display portion with light.

The display unit has a liquid crystal display panel having a substantially rectangular parallelepiped shape. Since the liquid crystal display panel itself cannot emit light, an illumination light source for displaying a video on the display surface is required, and a backlight device is used as the illumination light source.

The backlight device generally adopts the following two modes: that is, the edge light system in which the light guide plate is disposed on the rear surface side of the display unit and the illumination light source is disposed on the edge side of the light guide plate; and a direct-down system in which the diffusion plate is disposed on the back surface side of the display unit and the illumination light source is disposed on the back surface side of the diffusion plate.

In the edge light type of the backlight device, a Cold Cathode Fluorescent Lamp (CCFL) is arranged on the edge side of the light guide plate, and light incident from the edge of the light guide plate is emitted from one surface of the light guide plate while being guided inside the light guide plate (for example, see patent document 1). However, since it is difficult to uniformly improve the luminance characteristics in a display device having a large display surface area, a direct-type backlight device is used in a display device such as a television which is becoming larger in size.

As for the direct type backlight device, the following two types of light sources are generally used as the illumination light source: that is, a CCFL type illumination source having electrodes at both ends and a plurality of Cold Cathode Fluorescent Lamps (CCFLs) in a straight tube shape or a substantially U shape arranged in parallel on a back surface side of the diffusion plate (for example, see patent document 2); and an LED-type illumination light source in which a plurality of Light Emitting Diodes (LEDs) are arranged side by side on the back surface side of the diffusion plate (see, for example, patent documents 3 to 5).

The CCFL type backlight device includes: a plurality of cold cathode fluorescent lamps arranged in parallel and separated up and down along the direction of the surface of the diffusion plate; a support case for accommodating and supporting the cold cathode fluorescent lamp; an inverter circuit board for lighting the cold cathode fluorescent lamp; and a cover plate covering the inverter circuit substrate.

However, since the CCFL type backlight device requires high-voltage components such as an inverter circuit board for emitting light from the cold cathode fluorescent lamp and electrodes at both ends of the cold cathode fluorescent lamp, and a long insulation distance needs to be secured around the high-voltage components, the high-voltage components become an obstacle to preventing the front and rear thickness from being reduced. Therefore, there is a trend toward adoption of an LED type backlight device, which is advantageous in that the thickness can be reduced more in the front and rear than the CCFL type backlight device, without requiring high-voltage components and a long insulation distance.

Further, since the cold cathode fluorescent lamp has a length that is arranged across both lateral end portions of the diffusion plate, the lighting of the cold cathode fluorescent lamp cannot be controlled in a fine range. In addition, high-speed flicker control for suppressing motion blur is inferior to the LED type. In addition, in order to light a plurality of cold cathode fluorescent lamps with a high voltage, power consumption is large, and a heat generation amount when the cold cathode fluorescent lamps are lit is also large. Therefore, it is more advantageous to use an LED type backlight device that can easily perform control in a fine range and can perform high-speed flicker control, and that can make power consumption and heat generation smaller than those of the CCFL type backlight device.

The LED type backlight device includes: a plurality of light emitting diode substrates having a plurality of light emitting diodes mounted on one surface thereof; a support case for accommodating and supporting the light emitting diode substrate; and a power supply substrate for making the light emitting diode emit light.

The applicant of the present invention has developed an LED-type backlight device comprising: the LED substrate comprises a plurality of LED substrates, a plurality of LED substrates and a plurality of LED chips, wherein the LED substrates are rectangular and connected into a row, and a plurality of LEDs are arranged on one surface of each LED substrate; a support case that accommodates and supports a plurality of rows of the vertically separated light emitting diode substrates; a shaft body such as a rivet for fixing both ends of the light emitting diode substrate; a connector connecting adjacent light emitting diode substrates to each other; a plurality of lenses which are mounted on one surface of the light emitting diode substrate, face the light emitting diodes, and diffuse light emitted from the light emitting diodes; a reflection sheet which is placed on one surface of the light emitting diode substrate and reflects light diffused by the lens; and a support pin for suppressing bending of the diffuser plate.

The LED-type backlight device is assembled by the following steps (1) to (5).

(1) A support case is laid on an operation table with an open side facing upward, and a plurality of laterally adjacent light emitting diode substrates are arranged in parallel in the support case.

(2) The adjacent light emitting diode substrates are connected to each other by a connector, and the end of the end side light emitting diode substrate is connected to a connector for connecting a power supply.

(3) Both ends of the led substrates arranged side by side are fixed to the support case by a shaft such as a rivet.

(4) The reflecting sheet is placed on one surface of the light emitting diode substrate.

(5) A plurality of support pins are mounted to the support case from the reflector sheet side.

The support case is formed by molding a metal plate, and has a flat plate-like plate portion having a rectangular shape, a frame portion connected to the periphery of the plate portion and having one side opened, and four overhang pieces connected to the outer edge of the frame portion. First mounting holes are provided in the plate portion at positions facing both end portions of the led substrates arranged side by side, and second mounting holes are provided in positions where the support pins are arranged.

The light emitting diode substrate is rectangular, has a circuit portion on one surface, and has a light emitting diode and a lens mounted on the one surface, and has a connection portion on one of both end portions, and a through hole corresponding to the first mounting hole in both end portions.

The light emitting diode is formed such that emitted light is concentrated within a predetermined angle with respect to an optical axis extending from a front surface of the light emitting diode.

The lens is separated from and opposite to the top of the light emitting diode, has a thick circular plate shape, and has a hemispherical concave portion for diffusing light emitted from the light emitting diode to the periphery.

The reflection sheet is quadrangular corresponding to the plate part of the support shell and has the following structure: that is, a first hole having a shape larger than that of the lens is provided at a position facing the lens, a second hole having a shape larger than that of the connector is provided at a position facing the connector, and when the reflector is placed on one surface of the light emitting diode substrate, the lens is disposed in the first hole, and the connector is disposed in the second hole, whereby thermal expansion of the reflector caused by the light emitting diode can be absorbed.

Patent document 3 describes the following technique: that is, the orientation of the circuit board can be easily confirmed by printing the mark on the circuit board. A plurality of rectangular circuit boards are arranged so that the longitudinal direction thereof coincides with the left-right direction, and the circuit boards are arranged in a matrix and mounted on a mounting member. A light emitting portion (e.g., a light emitting diode) is mounted on each circuit board. A first connection portion (for example, a male connection portion) is mounted on the right end portion of each circuit board, and a second connection portion (in this case, a female connection portion) is mounted on the left end portion of each circuit board.

Between the circuit boards adjacent to each other in the left-right direction, the first connection portion of the circuit board disposed on the left side and the second connection portion of the circuit board disposed on the right side are connected via a connector that bridges the connection portions.

When mounting the circuit board on the mounting member, the operator needs to confirm the orientation of the circuit board in the left-right direction (hereinafter, simply referred to as the orientation of the circuit board). However, since the first connecting portion has a similar shape to the second connecting portion, it is difficult to confirm the orientation of the circuit board using the difference in the shape of the first connecting portion and the second connecting portion as a clue.

If the circuit boards are mounted on the mounting member in the reverse direction, the adjacent circuit boards cannot be connected to each other by the connector. In addition, when the mounting operation of the circuit board is started without noticing that the circuit board is in the reverse state, even if an error is noticed before the mounting of the circuit board is finished, the mounting operation needs to be performed again after the circuit board is returned to the correct orientation. As a result, the efficiency of the mounting operation is deteriorated, and therefore, in patent document 3, the following structure is adopted: that is, a mark is printed on the circuit substrate, thereby making it possible to easily confirm the orientation of the circuit substrate.

Patent document 4 describes a backlight device having the following structure: that is, a plurality of LED substrates (element substrates) on each of which a plurality of LEDs (solid state light emitting elements) are mounted in a longitudinal direction are used, and these LED substrates are mounted on a base formed into a shallow box shape, and the plurality of LEDs are uniformly arranged in the base. The plurality of LEDs mounted on the LED substrate are covered with a lens (cover) for light diffusion, and the entire surface of the bottom plate of the chassis on which the LEDs are arranged is covered with a reflector sheet having good light reflectivity, and light emitted from each LED is diffused by each lens and reflected by the reflector sheet, thereby uniformly illuminating the entire back surface of the liquid crystal display panel.

Patent document 5 describes a backlight device having the following structure: that is, the LED device includes a support pin, a base end portion of which is inserted through the reflective sheet and mounted on the LED substrate, and a tip end portion of which is provided so as to protrude from the LED substrate, and the support pin supports the optical sheet so as to maintain a relative interval between the optical sheet and the LED substrate.

Patent document 1 describes an edge-light type backlight device having the following structure: that is, the light sources are disposed on both sides of a support plate that supports the liquid crystal display panel and the light guide plate on one surface, and the driving of the liquid crystal display panel and the light sources is controlled by a circuit board provided on the other surface of the support plate, so that transmission lines (conductors) connected to the circuit board are connected to the liquid crystal display panel and the light sources through holes provided in the support plate, and driving signals are transmitted to the liquid crystal display panel and the light sources. Since the support plate is housed in a thin housing, it is necessary to house the conductors in a limited space, and therefore, a groove is formed in an edge portion of a housing container (support plate) housing the light source, the display panel, and the like, and the plurality of conductors passing through the through-holes are housed in the groove.

Patent document 1: japanese patent laid-open No. 2005-4200

Patent document 2: japanese patent laid-open No. 2008-116832

Patent document 3: japanese patent laid-open No. 2007-73300

Patent document 4: japanese patent laid-open No. 2008-305940

Patent document 5: japanese patent laid-open publication No. 2007-322697

Disclosure of Invention

However, the mark printed on the circuit board as in patent document 3 is not limited to the mark indicating the orientation of the circuit board. In this case, the operator needs to visually distinguish a mark indicating the orientation of the circuit board from other marks (for example, marks indicating operational notes).

In addition, there are cases where one kind of mark has multiple meanings. For example, patent document 3 shows a case where a mark indicating the mounting position of the circuit board on the mounting member and a mark indicating the orientation of the circuit board are used in combination. In this case, the operator needs to correctly read a plurality of meanings based on one kind of the mark. Since the printed mark may contain a large amount of information, the operator may be burdened with recognizing the mark. In addition, when a misread flag or a misread meaning occurs, it is difficult for the operator himself to notice the error.

As a result, in the LED-type backlight device, there is a possibility that the efficiency of the mounting operation of the circuit board may be deteriorated.

In an LED-type backlight device, a chassis on which an LED substrate is mounted is generally manufactured by press-molding a thin metal plate, and the chassis thus manufactured has positioning holes that penetrate through a part of the chassis. The positioning holes are holes for positioning a metal plate to be a raw material with respect to a die for press forming, and three or more positioning holes are provided in the surface of the base plate.

The back surface of the chassis of the backlight device is used for mounting components of the liquid crystal display device, and these components are mounted in component mounting holes formed through the chassis by an appropriate method such as caulking or locking.

Therefore, when the backlight device having the above-described configuration is used, ventilation occurs through the through-holes such as the positioning holes and the component mounting holes, and it is inevitable that dust enters the chassis interior along with the ventilation. As described above, although the inside of the chassis is covered with the reflection sheet, since the reflection sheet is provided with the hole for exposing the lens, dust entering the inside of the chassis enters the front surface side of the reflection sheet through the exposure hole of the lens, adheres to and accumulates on the reflection surface of the reflection sheet and the surface of the lens, and adheres to the liquid crystal display panel as an object to be irradiated, thereby causing optical problems such as unevenness of irradiation light, insufficient illuminance of the irradiation light, and the like.

In addition, since dust entering the inside of the chassis adheres to and accumulates on the surface of the LED substrate arranged on the chassis, if the dust has conductivity, there is a possibility that electrical problems such as short-circuiting of a circuit formed on the LED substrate may occur.

Further, there is a possibility that light emitted from the LED in the base may leak to the outside through a through hole such as a positioning hole and a component mounting hole provided in the base, and the following problem arises: that is, for example, when a liquid crystal display device having such a backlight device is used while being hung on a wall, the leaked light is irradiated on the surrounding wall surface, and unnecessary anxiety is given to the user.

Further, in the case where both the rivet and the support pin are attached to the LED substrate as described in patent document 5, the difference in the outer dimensions of the through hole for the support pin and the through hole for the rivet, which are opened in the reflection sheet, is small, and hence the through holes cannot be visually distinguished from each other, and it is difficult to distinguish them from each other, and therefore, there is a possibility that an error occurs in attaching the support pin and the rivet. If the rivet is erroneously attached to the through hole for the support pin, the optical sheet is bent, and the distance between the optical sheet and the LED substrate cannot be secured uniformly. Therefore, luminance unevenness, color unevenness, and the like of the display device may occur.

In addition, when the container having the groove is resin-molded as described in patent document 1, the shape of a mold for molding the container becomes complicated. On the other hand, when the storage container is formed of metal, bending, extrusion, drawing, or the like is required, and the storage container needs a long time to be manufactured. In addition, dust may enter from the through-hole.

The present invention has been made in view of the above circumstances, and a main object thereof is to provide a light source device and a display device which can improve workability in mounting a circuit board by forming a concave or convex mark indicating the direction of the circuit board.

Another object of the present invention is to provide an illumination device that can prevent dust from entering the inside of a chassis through a through hole provided in the chassis on which an element substrate is mounted, and can prevent light from leaking to the outside of the chassis, thereby eliminating optical and electrical problems caused by such a situation, and that can operate stably for a long period, and a liquid crystal display device using the illumination device.

Another object of the present invention is to provide a backlight device that is mounted on a substrate or a support member by inserting support pins and rivets into two through holes formed in a reflection sheet, and that can prevent erroneous mounting of the rivets and support pins by providing a recognition portion on the reflection sheet in the vicinity of the through holes into which the support pins are inserted, and a display device including the backlight device.

Another object of the present invention is to provide a display device in which conductors can be collected in a short time with a simple configuration and dust can be prevented from entering through holes through which the conductors are inserted.

The light source device according to the present invention includes: a circuit board on which a light emitting section is mounted and which is provided with a first connection section and a second connection section for supplying power to the light emitting section separately; and a mounting member on which the circuit board is mounted, wherein a concave or convex mark indicating a direction at a mounting position of the mounting member is formed on the circuit board.

The light source device according to the present invention preferably has the following configuration: that is, the mark has a concave shape, and a convex mark is formed on a portion of the mounting member facing the mark.

The light source device according to the present invention includes: a circuit board on which a light emitting portion, and a first connecting portion and a second connecting portion that are separately arranged are mounted; and a mounting member on which the circuit board is mounted, wherein a concave or convex mark indicating an orientation in a direction in which the first connection portion and the second connection portion of the circuit board are separated is formed on the circuit board.

The light source device according to the present invention preferably has the following configuration: that is, the circuit board is formed with a notch-shaped portion or a hole penetrating from one surface of the circuit board to the opposite surface of the one surface as the mark, and the mounting member is formed with a convex mark engaging with the mark.

The light source device according to the present invention preferably has the following configuration: that is, the marks are formed on one side and the other side of the circuit board in the separating direction, at least one of the number, size, and shape of the marks on the two sides is different, and the marks have the number, size, and shape corresponding to the marks to be engaged.

The light source device according to the present invention preferably has the following configuration: that is, the mark is formed by making the outer edge shape of the circuit substrate at one end portion in the separation direction different from the outer edge shape of the circuit substrate at the other end portion.

The display device according to the present invention includes: a display unit having a display surface on one side; and the light source device of the invention is arranged on the other side of the display part.

In the present invention, a light source device includes a circuit substrate and a mounting member. A light emitting section, a first connecting section, and a second connecting section are mounted on the circuit board. Hereinafter, the direction in which the first connection portion and the second connection portion are separated is referred to as a direction in which the connection portions are separated from each other.

On the circuit board, marks indicating the orientation in the direction in which the connection portions of the circuit board are separated from each other are formed. Hereinafter, the orientation in the direction in which the connecting portions of the circuit boards are separated from each other is simply referred to as the orientation of the circuit board. The orientation of the circuit board corresponds to the orientation of the connection of the circuit boards (for example, the connection of the circuit boards).

The mark formed on the circuit board is concave or convex. Such marks can be easily identified visually or tactually.

Therefore, the operator who manufactures the light source device can easily and accurately confirm the orientation of the circuit board by observing the mark and touching the mark with a finger. Further, the operator can mount the circuit board arranged in the correct direction on the mounting member.

The light source device described above constitutes a display device together with a display unit having a display surface on one side, and light is irradiated from the other side of the display unit.

In the present invention, a notch-shaped portion or a hole is formed in the circuit board as a concave mark indicating the orientation of the circuit board.

A convex mark is formed on the mounting member. The concave mark and the convex mark can be easily recognized visually or tactually.

The operator can easily and accurately confirm the orientation of the circuit board by observing the mark and the touch mark.

Further, the mark formed on the circuit board is engaged with the mark formed on the mounting member. In this case, the circuit board can be easily and accurately positioned by a simple method such as engagement between the mark and the mark.

The mark formed on the circuit board penetrates from one surface of the circuit board to the opposite surface of the circuit board. Therefore, the presence or absence and/or the formation position of the mark formed on the mounting member can be observed by the mark.

As a result, the workability in mounting the circuit board can be further improved.

If a notch-like portion or a hole that does not penetrate the circuit board is formed as a mark on the circuit board, the following problems may occur: that is, in order to observe the presence or absence of a mark formed on the mounting member and/or the formation position, the circuit board must be separated from the mounting position. Further, the mark to be engaged with the logo is formed on the surface of the circuit board facing the mounting member, that is, at a position where the mark is not easily visible or touched by the operator. As a result, there is a possibility that the efficiency of the mounting operation may be deteriorated.

In addition, it is also important to form a convex mark on the mounting substrate instead of a concave mark.

Generally, a portion of the mounting member on which the circuit board is mounted is formed in a thin flat plate shape. Therefore, the recessed mark is a hole formed to penetrate the mounting member. This is because it is difficult to form a hole penetrating a thin mounting member, and such a marker does not have a depth at which the marker can be easily and reliably engaged with the mark, and therefore, the operability is poor.

However, in this case, the following problems may occur: that is, the light emitted from the light emitting portion passes through the hole penetrating the mounting member and is uselessly incident on the back surface of the mounting member. Such light leakage causes deterioration in the quality of the light source device, and further causes deterioration in the quality of a display device including the light source device.

That is, the convex mark can prevent light leakage caused by the mark formed on the mounting substrate.

In the present invention, a plurality of notch-shaped portions or holes are formed in the circuit board as the concave-shaped marks indicating the orientation of the circuit board. The number, size, and/or shape of the marks formed on one side in the direction in which the connecting portions of the circuit substrate are separated from each other are different from the number, size, and/or shape of the marks formed on the other side in the direction in which the connecting portions of the circuit substrate are separated from each other.

The mounting member is formed with a convex mark having a number, a size, and a shape corresponding to the mark to be engaged.

The plurality of marks and logos can be easily recognized individually by visual or tactile sense.

The operator can easily and accurately confirm the orientation of the circuit board by observing the mark and the touch mark.

Further, the plurality of marks are engaged with the corresponding marks, respectively. In this case, the circuit board can be easily, accurately, and uniquely positioned by a simple method of engaging each of the plurality of marks with the mark.

Further, since at least one of the number, size, and shape of the marks is different between one side and the other side in the direction in which the connection portions of the circuit board are separated from each other, the circuit board is not mounted in the reverse direction even if the operator forgets to confirm the orientation of the circuit board or mistakes the orientation of the circuit board. This is because the mark and the logo are not engaged with each other when the circuit board is reversed.

Therefore, even when the information indicating the orientation of the circuit board is not transmitted to the operator due to a problem, the operator can understand the information indicating the orientation of the circuit board from experience during the mounting operation, and can effectively utilize the information to improve the efficiency of the subsequent mounting operation.

In the present invention, the mark indicating the orientation of the circuit substrate is formed by making the outer edge shape of the circuit substrate at one end portion in the direction in which the connection portions of the circuit substrate are separated from each other different from the outer edge shape of the circuit substrate at the other end portion. That is, the outer edge shape itself of the circuit substrate may be used as the mark. In this case, the mark has no particular problem whether it is concave or convex.

When a mark is formed on one surface of a circuit board, the position of the mark is restricted by the layout of a light emitting unit, a connecting unit, and the like mounted on the one surface. However, when the outer edge shape itself of the circuit board is used as the mark, the layout restriction of the components mounted on the circuit board is not easily received. That is, restrictions in manufacturing the circuit board can be reduced.

The lighting device according to the present invention is a lighting device in which an element substrate on which a plurality of solid state light emitting elements are mounted is mounted in parallel on a base, and light emitted from each solid state light emitting element is irradiated onto an object to be irradiated which is disposed to face the base, wherein the base includes a through hole which penetrates in a front and back direction, and the element substrate is mounted at a position where the through hole is closed.

In the present invention, the mounting position of the element substrate arranged on the base is set to a position capable of blocking the through hole formed through the base, and the through hole is blocked by mounting the element substrate at a predetermined position, so that dust is prevented from entering the inside of the base through the through hole, and light is prevented from leaking to the outside of the base. The through hole is blocked by the element substrate which is originally required, so that dust can be prevented from entering the inside of the base, and light can be prevented from leaking to the outside of the base without a special cover member and without installing the cover member.

Further, the lighting device according to the present invention preferably has the following configuration: that is, the through hole is a positioning hole for positioning the base with respect to a molding die of the base.

In the present invention, when the base is molded, the positioning hole provided for positioning with respect to the mold is closed by the element substrate, so that dust is prevented from entering the inside of the base through the positioning hole and light is prevented from leaking to the outside of the base.

Further, the lighting device according to the present invention preferably has the following configuration: that is, the through hole is a component mounting hole formed in a recess provided in a part of the base, and the element substrate is mounted at a position closing the entire recess.

In the present invention, the component mounting hole provided in the chassis for mounting various components from the back side is closed by the element substrate, so that dust is prevented from entering the interior of the chassis through the component mounting hole and light is prevented from leaking to the outside of the chassis. The component mounting hole is formed in a recess formed by recessing a part of the base, and the component can be mounted by tightening, locking, or the like. The element substrate is disposed so as to block the entire recess to prevent dust from entering the inside of the base and to prevent light from leaking to the outside of the base.

Further, the lighting device according to the present invention preferably has the following configuration: that is, the element substrate is mounted so as to be in close contact with the base in the vicinity of the position where the through hole is closed.

In the present invention, the element substrate is mounted in close contact with the base, and the through-hole is tightly closed by the element substrate. The entire element substrate may be attached to the base in close contact therewith, but the object can be achieved by attaching the element substrate to the base in close contact therewith at least in the vicinity of the through hole.

Further, the lighting device according to the present invention preferably has the following configuration: that is, the element substrate has a rectangular shape in which a plurality of solid-state light-emitting elements are mounted side by side in the longitudinal direction, and the through hole is formed between fixing holes provided in the chassis for fixing the vicinity of both end portions of the element substrate.

In the present invention, a required number of solid state light emitting elements are arranged in parallel in a chassis by using a rectangular element substrate on which a plurality of solid state light emitting elements are arranged in parallel in a longitudinal direction, and by using an element substrate having an area as small as possible.

In addition, a liquid crystal display device according to the present invention is a liquid crystal display device in which a backlight device is disposed behind a liquid crystal display panel for displaying an image, and light emitted from the backlight device is modulated and transmitted by the liquid crystal display panel to display an image on a front surface of the liquid crystal display panel, wherein a lighting device having the above-described configuration is used as the backlight device.

In the present invention, the illumination device having the above-described configuration is used as a backlight device for irradiating the liquid crystal display panel with transmitted light, thereby eliminating problems caused by dust entering the chassis and light leaking to the outside of the chassis.

The backlight device of the present invention includes: a substrate having a plurality of light-emitting elements mounted on one surface thereof; a support member that supports the other surface of the substrate; a reflective sheet that covers the one surface of the substrate and reflects light emitted from the light-emitting element; and an optical sheet which is opposed to the reflection sheet and diffuses light, characterized by comprising: a first through hole and a second through hole provided on the reflecting sheet; a support pin including a foot portion inserted through the first through hole and attached to at least one of the substrate and the support member, and a columnar portion protruding from the foot portion so as to protrude from the reflection sheet and supporting the optical sheet; a rivet including a head portion larger than the second through hole and a leg portion extending from the head portion, the leg portion being inserted into the second through hole from one surface side of the substrate and attached to at least one of the substrate and a support member, the head portion holding the reflection sheet; and a recognition unit provided on the reflection sheet and located near the first through hole.

In the present invention, a recognition portion is provided on the reflection sheet in the vicinity of the first through hole into which the support pin is inserted. In addition, when the support pin and the rivet are attached, the support pin and the rivet can be attached to the first through-hole and the second through-hole while observing the recognition portion, and thus erroneous attachment does not occur.

In addition, the backlight device of the present invention preferably has the following structure: that is, the column portion of the support pin has a larger brim than the head portion, and the identification portion is provided such that the identification portion is hidden by the brim when the foot portion of the support pin is inserted into the first through hole, and at least a part of the identification portion is visible when the foot portion of the rivet is inserted into the first through hole.

In the present invention, if the rivet is erroneously mounted in the first through hole, the recognition portion is visible, and therefore, the error is immediately recognized, and the support pin and the rivet can be mounted more reliably.

In addition, the backlight device of the present invention preferably has the following structure: that is, the identification portion is a hole formed in the reflection sheet.

In the present invention, a hole formed in the reflection sheet is used as the identification portion. The holes may be formed on the reflective sheet at the same time as the first through-holes and the second through-holes are formed. Therefore, the identification portion can be reliably formed without requiring a special process.

The display device of the present invention is characterized by including the backlight device.

In the present invention, since the backlight device of the present invention is included, it is possible to prevent the display device from generating luminance unevenness, color unevenness, or the like.

The display device according to the present invention includes: a support plate having one surface side supporting a light source for irradiating light to the display panel; a circuit board disposed on the other surface side of the support plate, for driving the display panel or the light source; and a through-hole provided in the support plate and through which a conductor connected to the circuit board is inserted, the through-hole including: a protective cylinder fitted in the through hole to protect the conductor; a cover portion that faces the protection cylinder in a penetrating direction of the through hole and blocks the protection cylinder; and a recess formed on a portion where the cover and the protection cylinder face each other.

In the present invention, the plurality of conductors inserted through the through holes are disposed in the concave portion, the protective cylinder is closed by the lid body, and the conductors are sandwiched between the lid body and the protective cylinder.

The display device according to the present invention preferably has the following structure: that is, the support plate includes a protruding portion protruding to the other surface side, and the through hole is provided in the protruding portion.

In the present invention, the protective cylinder is fitted into the through hole provided in the protruding portion from the other surface side of the support plate, so that the protective cylinder does not protrude greatly to the one surface side and does not come into contact with a component arranged on the one surface side of the support plate.

The display device according to the present invention preferably has the following structure: that is, an elastic member is provided inside the recess portion so as to face the bottom surface of the recess portion.

In the present invention, the conductor is held between the elastic member and the bottom surface of the recess, and the conductor is tightly collected by the elastic force of the elastic member, thereby filling the gap in the recess.

The display device according to the present invention preferably has the following structure: that is, the bottom surface of the recess is flat.

In the present invention, the flat bottom surface of the recess can easily arrange the conductors regularly in the recess, and the conductors can be easily collected densely.

The display device according to the present invention preferably has the following structure: that is, the protective tube includes an engaging concave portion (or an engaging convex portion) formed at an edge portion of the through hole and an engaging convex portion (or an engaging concave portion) formed at an outer peripheral portion of the protective tube, and when the protective tube is arranged in the through hole in a predetermined direction, the engaging convex portion (or the engaging concave portion) is engaged with the engaging concave portion (or the engaging convex portion).

In the present invention, when the protective tube is disposed in the through hole in the predetermined direction, the engagement convex portion (or the engagement concave portion) formed in the outer peripheral portion of the protective tube is engaged with the engagement concave portion (or the engagement convex portion) formed in the edge portion of the through hole, so that the protective tube can be attached to the through hole without the operator's mistake in the orientation of the protective tube when assembling the display device.

The display device according to the present invention preferably has the following structure: namely, the protection device comprises a clamping hole (or a clamping protrusion) arranged around the through hole and a clamping protrusion (or a clamping hole) arranged on a protruding part extending outwards from the protection cylinder, wherein the clamping protrusion (or the clamping hole) is clamped with the clamping hole (or the clamping protrusion).

In the present invention, a chucking hole and a chucking protrusion are provided on the support plate and the protective cylinder to position the protective cylinder in a radial direction of the through hole.

The display device according to the present invention preferably has the following structure: that is, a positioning portion provided at an outer peripheral portion of the protection cylinder is included to position the protection cylinder in a penetrating direction of the through hole.

In the present invention, the positioning portion positions the protection cylinder in a direction in which the through hole passes through.

The display device according to the present invention preferably has the following structure: that is, the protection device includes a bent portion provided on one of an edge portion of the cover and an outer peripheral portion of the protection tube, and an abutting portion provided on the other of the edge portion of the cover and the outer peripheral portion of the protection tube, and the abutting portion abuts against an inner side of the bent portion.

In the present invention, when the cover is attached to the protection cylinder, the abutting portion abuts against an inner corner of the bending portion, and the cover is rotated toward the protection cylinder about the abutting portion as a fulcrum.

The display device according to the present invention preferably has the following structure: that is, the protective device includes a claw portion (or a locking hole) provided in an edge portion of the cover portion, and a locking hole (or a claw portion) provided in an outer peripheral portion of the protective tube, and the locking hole (or the claw portion) is locked to the claw portion (or the locking hole).

In the present invention, the claw portion is engaged with the engaging hole, and the lid portion is fixed to the protection cylinder.

According to the present invention, the operator can visually and tactually confirm the orientation of the circuit board. Therefore, as compared with the case where the orientation of the circuit board can be visually confirmed, the occurrence of an error in reversing the circuit board can be suppressed.

The amount of information obtained by touching the concave or convex mark with a finger is often smaller than that obtained by observing a printed mark, for example, but the information required for that portion can be intuitively grasped. Therefore, the operator can determine the orientation of the circuit board based on the presence or absence of the mark and/or the formation position, without placing a heavy burden on the operator.

As a result, workability in mounting the circuit board can be improved.

In addition, the circuit board on which the light emitting portion is mounted is one of optical parts. Therefore, the colors of the circuit board and the electronic components mounted on the circuit board are often limited to colors that assist the illumination of the light-emitting portion or colors that do not interfere with the illumination.

When a mark is printed on a circuit board, the color of the mark must be different from that of the circuit board. However, the concave or convex mark has no particular problem whether it has the same color as the circuit board or a different color. That is, the circuit board having the concave or convex mark is less restricted in manufacturing time than the circuit board having the mark printed thereon.

According to the present invention, since the through hole penetrating the base is closed by the element substrate mounted on the base, dust does not enter the base through the through hole, optical and electrical problems due to adhesion and accumulation of dust can be eliminated, and light can be stably irradiated for a long period of time, and unnecessary anxiety to a user due to light leaking to the outside of the base through the through hole does not occur, so that the present invention can provide excellent effects as follows: that is, the liquid crystal display device according to the present invention can display a good image or the like for a long period of time by stable illumination.

According to the present invention, the support pins and the rivets can be reliably attached without making an attachment error, and the optical sheet can be prevented from being bent, so that the distance between the optical sheet and the LED substrate can be ensured to be uniform.

According to the present invention, the plurality of conductors inserted through the through holes are disposed in the concave portion of the protective cylinder, the protective cylinder is closed by the lid body, and the conductors are sandwiched between the lid body and the protective cylinder. Therefore, the conductor can be collected in the recess in a short time, and dust can be prevented from entering from the through hole.

Drawings

Fig. 1 is a schematic exploded perspective view showing a configuration of a display device according to the present invention.

Fig. 2 is an exploded perspective view showing a configuration in which a housing of the display device according to the present invention is omitted.

Fig. 3 is a partial vertical sectional side view showing the structure of the display device according to the present invention.

Fig. 4 is a schematic perspective view showing a structure of a light source device according to the present invention.

Fig. 5 is a front view showing a structure of a light source device according to the present invention.

Fig. 6 is a partial vertical cross-sectional plan view showing the structure of the light source device according to the present invention.

Fig. 7 is a schematic front view showing the structure of the substrate support.

Fig. 8 is a schematic rear view showing the structure of the light source device.

Fig. 9 is a perspective view showing the structure of the light emitting diode substrate.

Fig. 10 is a schematic front view showing an arrangement structure of the light emitting diode substrate.

Fig. 11 is an enlarged front view showing the structure of the lens and the shaft portion.

Fig. 12 is a graph showing the amount of light emitted from the light emitting diode according to the light emission angle.

Fig. 13A is an exploded cross-sectional view showing the structure of the shaft body.

Fig. 13B is an exploded perspective view showing the structure of the shaft body.

Fig. 14A is an enlarged cross-sectional view showing the structure of the shaft body portion.

Fig. 14B is an enlarged cross-sectional view showing the structure of the shaft body portion.

Fig. 15 is an enlarged cross-sectional view taken along line XV-XV of fig. 13A.

Fig. 16 is a front view showing the structure of the reflection sheet.

Fig. 17 is a development view showing a structure of a corner portion of the reflection sheet.

Fig. 18 is a sectional view showing the structure of the support pin.

Fig. 19 is a sectional view showing the structure of the wire holder portion.

Fig. 20 is a sectional view showing a state where the cover of the wire holder is released.

Fig. 21 is a perspective view showing a structure of a lead-out hole portion of the substrate support.

Fig. 22 is a partially enlarged view showing a state where the cover of the wire holder is removed.

Fig. 23 is a development view showing another structure of a corner portion of the reflection sheet.

Fig. 24 is a front view showing another structure of the connector opposing portion of the reflection sheet.

Fig. 25 is a front view showing another configuration of the light source device.

Fig. 26 is a schematic front view showing another structure of the substrate support.

Fig. 27 is a schematic front view showing another structure of the reflection sheet.

Fig. 28 is a cross-sectional view showing another relationship between the reflection sheet and the shaft body.

Fig. 29 is a perspective view showing the structure of a light source device according to embodiment 1.

Fig. 30 is a plan view showing the structure of a light source device according to embodiment 1.

Fig. 31 is a plan view showing a structure obtained by omitting a reflection sheet of the light source device of embodiment 1.

Fig. 32 is an enlarged cross-sectional view showing a part of the structure of the light source device according to embodiment 1.

Fig. 33 is a plan view showing a structure of a reflection sheet provided in the light source device of embodiment 1.

Fig. 34 is an enlarged front view showing a configuration of a main part when the reflection sheet is unfolded.

Fig. 35 is an enlarged front view showing the structure of a main part of the reflection sheet.

Fig. 36 is an enlarged cross-sectional plan view showing the structure of the reflection sheet portion.

Fig. 37 is a sectional view showing a configuration of a display device including the light source device according to embodiment 1.

Fig. 38 is an expanded front view showing another configuration of a main part of a reflection sheet provided in the light source device of embodiment 1.

Fig. 39 is an expanded front view showing another configuration of a main part of a reflection sheet provided in a light source device according to embodiment 1.

Fig. 40 is an enlarged front view showing another structure of a main portion of the reflection sheet.

Fig. 41A is an expanded front view showing another configuration of a main part of the reflection sheet.

Fig. 41B is a front view showing another configuration of a main part of the reflection sheet, which is in a housing shape.

Fig. 42 is a plan view showing another structure of the reflection sheet.

Fig. 43 is a plan view showing another structure of the reflection sheet.

Fig. 44 is an enlarged cross-sectional view showing a part of the structure of the light source device according to embodiment 2.

Fig. 45 is a plan view of the light source device according to embodiment 2, with a part omitted.

Fig. 46 is a schematic perspective view of a light source device according to embodiment 2, partially exploded.

Fig. 47 is a plan view showing a state where the light source device of embodiment 2 does not have a reflection sheet.

Fig. 48 is a perspective view showing a structure of a lens-mounted light emitting diode substrate of a light source device according to embodiment 2.

Fig. 49 is a perspective view showing a structure of a connector of a light source device according to embodiment 2.

Fig. 50 is an enlarged plan view of a portion of the reflection sheet of the light source device according to embodiment 2, which portion faces the connector.

Fig. 51 is an enlarged perspective view showing a state in which a portion of the reflection sheet facing the connector is biased in the thickness direction in the light source device according to embodiment 2.

Fig. 52 is a sectional view showing a configuration of a display device including the light source device according to embodiment 2.

Fig. 53 is an enlarged plan view showing another configuration of a notch portion of a reflection sheet provided in a light source device according to embodiment 2.

Fig. 54 is a plan view showing another configuration of a notch portion of a reflection sheet provided in a light source device according to embodiment 2.

Fig. 55 is a plan view showing another configuration of the notch portion of the reflection sheet provided in the light source device of embodiment 2.

Fig. 56 is a plan view showing another configuration of a notch portion of a reflection sheet provided in a light source device according to embodiment 2.

Fig. 57 is a plan view showing another configuration of a notch portion of a reflection sheet provided in a light source device according to the present invention of embodiment 2.

Fig. 58 is a perspective view showing another configuration of a reflection sheet provided in a light source device according to embodiment 2.

Fig. 59 is a perspective view showing another configuration of a reflection sheet provided in a light source device according to embodiment 2.

Fig. 60 is a perspective view showing another configuration of a reflection sheet provided in a light source device according to embodiment 2.

Fig. 61 is a longitudinal sectional view schematically showing a display device according to embodiment 3.

Fig. 62 is a front view schematically showing an LED and an LED substrate provided with a reflection sheet according to embodiment 3.

Fig. 63 is a cross-sectional view taken along line I-I in fig. 62 schematically showing a rivet according to embodiment 3.

Fig. 64 is a sectional view taken along line II-II in fig. 62 schematically showing a set rivet according to embodiment 3.

Fig. 65 is a sectional view taken along line III-III in fig. 62 schematically showing a support rivet according to embodiment 3.

Fig. 66A is an enlarged cross-sectional view showing another structure of a portion where the LED substrate of embodiment 3 is fixed to a support plate.

Fig. 66B is an enlarged cross-sectional view showing another structure of a portion where the LED substrate of embodiment 3 is fixed to a support plate.

Fig. 67 is a sectional view showing a main part of the structure of a light source device according to embodiment 4.

Fig. 68 is a plan view of a part of a light source device according to embodiment 4.

Fig. 69 is a plan view of a light source device according to embodiment 4, partially exploded.

Fig. 70 is a plan view of a part of the components of the light source device of embodiment 4.

Fig. 71 is an enlarged plan view of a part of the light source device according to embodiment 4.

Fig. 72 is an enlarged plan view of a part of the light source device according to embodiment 4.

Fig. 73 is a perspective view showing the structure of a lens-mounted light-emitting diode substrate according to embodiment 4.

Fig. 74 is a perspective view showing the structure of a lens-mounted light-emitting diode substrate according to embodiment 4.

Fig. 75 is a sectional view showing an example of a fixture according to embodiment 4.

Fig. 76 is a sectional view showing the structure of a display device including the light source device according to embodiment 4.

Fig. 77 is a plan view of a part of a light source device according to another embodiment of embodiment 4.

Fig. 78 is a plan view of a light source device according to a second another embodiment of embodiment 4, partially exploded.

Fig. 79 is a plan view of a part of the components of a light source device according to a second another embodiment of embodiment 4.

Fig. 80 is a longitudinal sectional view schematically showing a display device according to embodiment 5.

Fig. 81 is a front view schematically showing a light-emitting diode and a substrate provided with a reflection sheet according to embodiment 5.

Fig. 82 is a graph showing the amount of light emitted from the light emitting diode according to the light emission angle.

Fig. 83 is a cross-sectional view taken along line IV-IV of fig. 81 schematically showing a rivet according to embodiment 5.

Fig. 84 is a cross-sectional view schematically showing a rivet according to a modification of the display device according to embodiment 5.

Fig. 85 is a sectional view schematically showing a screw of the display device according to embodiment 5.

Fig. 86 is an enlarged cross-sectional view of a part of the structure of the display device according to embodiment 6.

Fig. 87 is an enlarged cross-sectional view showing a part of the structure of the light source unit according to embodiment 6.

Fig. 88 is a front view showing a configuration in which a peripheral portion of a light source unit according to embodiment 6 is omitted.

Fig. 89 is a front view showing a configuration in which the peripheral portion of the light source unit and the light reflecting sheet of embodiment 6 are omitted.

Fig. 90 is a front view showing a configuration in which a peripheral portion of a light reflecting sheet according to embodiment 6 is omitted.

Fig. 91A is a vertical cross-sectional side view showing the structure of a first shaft body portion according to embodiment 6.

Fig. 91B is a cross-sectional plan view showing the structure of a first shaft body portion according to embodiment 6.

Fig. 92A is a vertical cross-sectional side view showing the structure of the second shaft portion in embodiment 6.

Fig. 92B is a cross-sectional plan view showing the structure of the second shaft portion according to embodiment 6.

Fig. 93 is a cross-sectional plan view showing the structure of a third shaft body portion according to embodiment 6.

Fig. 94 is a vertical cross-sectional side view showing another configuration of the first shaft body portion according to embodiment 6.

Fig. 95 is a vertical cross-sectional side view showing another structure of the second shaft portion in embodiment 6.

FIG. 96 is a cross-sectional top view showing another structure of the dislocation hole preventing portion.

Fig. 97 is a vertical cross-sectional side view showing another configuration of the first shaft body and the second shaft body portion.

Fig. 98 is a schematic perspective view showing another configuration of the light source device.

Fig. 99 is a front view showing another structure of the misalignment preventing portion of the light reflecting sheet.

Fig. 100 is a sectional view showing a main part of the structure of a light source device according to embodiment 7.

Fig. 101 is a plan view of a part of the light source device according to embodiment 7.

Fig. 102 is a plan view of a light source device according to embodiment 7, partially exploded.

Fig. 103 is a plan view of a part of the components of the light source device of embodiment 7.

Fig. 104 is an enlarged plan view of a part of the light source device according to embodiment 7.

Fig. 105 is an enlarged perspective view of a connector according to embodiment 7.

Fig. 106 is a plan view schematically showing the structure of a connector according to embodiment 7.

Fig. 107 is a plan view showing a dimensional relationship of an insertion hole in embodiment 7.

Fig. 108 is a perspective view showing the structure of a lens-mounted light-emitting diode substrate according to embodiment 7.

Fig. 109 is a sectional view showing an example of a fixture according to embodiment 7.

Fig. 110 is a sectional view showing a configuration of a display device including the light source device according to embodiment 7.

Fig. 111A is a perspective view showing a structure of a light-emitting diode substrate according to another embodiment of embodiment 7.

Fig. 111B is a perspective view showing a structure of a light-emitting diode substrate according to another embodiment of embodiment 7.

Fig. 112 is a sectional view showing a main part of the structure of a light source device according to embodiment 8.

Fig. 113 is a plan view of a part of a light source device according to embodiment 8.

Fig. 114 is a plan view of a light source device according to embodiment 8, partially exploded.

Fig. 115 is a plan view of a part of the components of the light source device of embodiment 8.

Fig. 116 is an enlarged plan view of a part of the light source device according to embodiment 8.

Fig. 117 is a perspective view showing the structure of a lens-mounted light-emitting diode substrate according to embodiment 8.

Fig. 118 is a sectional view showing the structure of a rivet according to embodiment 8.

FIG. 119 is a top view at line V-V of FIG. 118.

Fig. 120 is a sectional view showing a positional relationship between a rivet and a lens according to embodiment 8.

Fig. 121 is a sectional view showing a configuration of a display device including the light source device according to embodiment 8.

Fig. 122 is a plan view showing the back side of the head of a rivet of another light source device according to embodiment 8.

Fig. 123 is an enlarged plan view of a part of another light source device according to embodiment 8.

Fig. 124 is a plan view showing the back side of the head of a rivet of a second another light source device according to embodiment 8.

Fig. 125 is a vertical sectional view showing a partial structure of a display device including the light source device according to embodiment 9.

Fig. 126 is a horizontal cross-sectional view showing a structure of a connection portion between circuit boards included in the light source device according to embodiment 9.

Fig. 127A is a front view showing a structure of a connection portion between circuit boards included in the light source device according to embodiment 9.

Fig. 127B is a front view showing a relationship between a circuit board and a mounting member provided in the light source device according to embodiment 9.

Fig. 128 is a perspective view schematically showing a state in which circuit boards included in the light source device according to embodiment 9 are arranged side by side.

Fig. 129 is a plan view of the lighting device according to embodiment 10.

Fig. 130 is a plan view of a backlight chassis according to embodiment 10.

Fig. 131 is a perspective view showing an external appearance of the LED substrate according to embodiment 10.

Fig. 132 is an enlarged cross-sectional view showing a mounting portion of an LED board according to embodiment 10.

Fig. 133 is an enlarged cross-sectional view showing a mounting portion of an LED board according to embodiment 10.

Fig. 134 is a sectional view of the liquid crystal display device according to embodiment 10.

Fig. 135 is a cross-sectional view showing another embodiment of the liquid crystal display device according to embodiment 10.

Fig. 136 is a cross-sectional view showing a part of the structure of a display device including the backlight device according to embodiment 11.

Fig. 137 is an enlarged cross-sectional view showing a part of the configuration of the backlight device according to embodiment 11.

Fig. 138 is a sectional view showing the structure of a rivet of a backlight device according to embodiment 11.

Fig. 139 is a plan view of the backlight device according to embodiment 11, with a part omitted.

Fig. 140 is a schematic perspective view of a backlight device according to embodiment 11, partially broken away.

Fig. 141A is an enlarged plan view showing a part of the structure of a reflection sheet of the backlight device according to embodiment 11.

Fig. 141B is an enlarged plan view of a part of the structure of the reflection sheet of the backlight device according to embodiment 11.

Fig. 142 is a longitudinal sectional view schematically showing a display device according to embodiment 12.

Fig. 143 is a schematic rear view of the support plate according to embodiment 12 as viewed from the rear side.

Fig. 144 is a perspective view schematically showing through holes formed in the vicinity of the edge of the support plate according to embodiment 12.

Fig. 145 is a plan view schematically showing the protection cylinder fitted in the through hole.

Fig. 146 is a schematic sectional view taken along line VII-VII in fig. 145.

Fig. 147 is a schematic sectional view taken along line VIII-VIII in fig. 145.

Fig. 148 is a schematic sectional view taken along line IX-IX in fig. 145.

Fig. 149 is a plan view schematically showing the lid.

Fig. 150 is a schematic side view as viewed from the direction F1 shown in fig. 149.

Fig. 151 is a schematic side view as viewed from the direction F2 shown in fig. 149.

Fig. 152 is a schematic sectional view taken along line XI-XI in fig. 149.

Fig. 153 is a schematic side view as viewed from the direction F3 shown in fig. 149.

Fig. 154 is an explanatory view for explaining the mounting of the cover portion to the protection tube.

Fig. 155 is an explanatory view for explaining the mounting of the cover to the shield cylinder.

Fig. 156 is an explanatory view for explaining mounting of a cover to a protective tube of a display device according to embodiment 12.

Fig. 157 is an explanatory view for explaining mounting of a cover to a protective tube of a display device according to embodiment 12.

Fig. 158 is an enlarged perspective view schematically showing the vicinity of the engagement shaft.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings showing embodiments of the invention.

Fig. 1 is a schematic exploded perspective view showing a structure of a display device of the present invention, fig. 2 is a structural exploded perspective view showing a case of the display device omitted, fig. 3 is a partial vertical side view showing the structure of the display device, fig. 4 is a schematic perspective view showing the structure of a light source device, fig. 5 is a front view showing the structure of the light source device, fig. 6 is a partial vertical top view showing the structure of the light source device, fig. 7 is a schematic front view showing the structure of a substrate support, fig. 8 is a schematic rear view showing the structure of the light source device, fig. 9 is a perspective view showing the structure of a light emitting diode substrate, fig. 10 is a schematic front view showing an arrangement structure of the light emitting diode substrate, fig. 11 is an enlarged front view showing structures of a lens and a shaft portion, fig. 12 is a graph showing an amount of light emitted according to a light emission angle of light emitted from the light emitting diode, fig. 13A is an exploded cross-sectional view showing a structure of a shaft body, fig. 13B is an exploded perspective view showing a structure of a shaft body, fig. 14A and 14B are enlarged cross-sectional views showing a structure of a shaft body portion, fig. 15 is an enlarged cross-sectional view taken along an XV-XV line of fig. 13A, fig. 16 is a front view showing a structure of a reflection sheet, fig. 17 is an expanded view showing a structure of a corner portion of a reflection sheet, fig. 18 is a cross-sectional view showing a structure of a support pin, fig. 19 is a cross-sectional view showing a structure of a lead wire holder portion, fig. 20 is a cross-sectional view showing a state in which a cover body of the lead wire holder is released, fig. 21 is a perspective view showing a structure of a lead-out hole portion of a substrate support body, and fig. 22 is a partially enlarged.

The display device shown in fig. 1 to 3 includes: a display section A having a display surface for displaying a television image on the front side and having a substantially rectangular parallelepiped shape; a light source device B disposed on the rear side of the display unit A and having a substantially rectangular parallelepiped shape; an optical sheet C disposed between the light source device B and the display portion a; and a housing D for shielding the periphery of the display part A and the rear side of the light source device B.

< Structure of display section A >

As shown in fig. 1 to 3, the display section a includes: a liquid crystal display panel a1 having a display surface and being substantially rectangular; and a front holding frame a2 and a rear holding frame A3 which sandwich the peripheral portion of the display panel a1 in the front-rear direction, and the front holding frame a2 and the rear holding frame A3 are coupled to each other by a plurality of male screws, thereby sandwiching the peripheral portion of the display panel a1 in the front-rear direction. In the display unit a, a plurality of holes for attaching the peripheral portion of the display unit a to the light source device B are opened in the non-sandwiching portion between the front holding frame a1 and the rear holding frame a 2.

< construction of light Source device B >

As shown in fig. 1 to 6, the light source device B includes: a plurality of light emitting diodes B1 as a light source, which are arranged in a grid pattern separately side by side in two orthogonal directions; a circuit board group arranged in a plurality of rows, the circuit board group including a plurality of light emitting diode boards B3 arranged side by side in one direction, the light emitting diodes B1 and a lens B2 facing the top of each light emitting diode B1 being mounted on one surface of the light emitting diode board B3; a plurality of connectors B4, the plurality of connectors B4 connecting the adjacent light emitting diode substrates B3 in the circuit substrate group to each other; a reflection sheet B5 which is opposed to the one surface and the one surface of the connector B4 by the reflection sheet B5 and reflects the light diffused by the lens B2; a substrate support body B6 for supporting a plurality of rows of circuit substrate groups in parallel on one surface of the substrate support body B6; a plurality of shaft bodies B7 for fixing both ends of each light emitting diode substrate B3 to the substrate support body B6, the plurality of shaft bodies B7 being provided with a plurality of fixing portions; a plurality of support pins B8 for suppressing bending of the optical sheet C, the plurality of support pins B8; a wire holder B9 that draws and holds a plurality of wires B40 connected to the led board B3 in the middle of the wire holder B9; and a plurality of circuit boards B10, the circuit boards B10 being disposed on the outer surface of the board support B6.

< Structure of substrate support B6 >

Substrate support B6 is formed by molding a metal plate, and includes: a flat plate-like plate portion B61 having a substantially rectangular shape as shown in fig. 2 to 4; a frame portion B62 connected to the periphery of the plate portion B61 and having an open front side; and four overhang pieces B63 connected to the outer edge of the frame portion B62, and the substrate support B6 has a housing shape.

As shown in fig. 7, the plate portion B61 is provided with: a plurality of first mounting holes B64 into which shaft bodies B7 for fixing both ends of the light emitting diode substrate B3 are fitted, the first mounting holes B64; a plurality of second mounting holes B65 for mounting shaft bodies B7 for supporting pins B8 or suppressing the bias of the reflecting sheet B5 in a direction away from the light emitting diode substrate B3 in the plurality of second mounting holes B65; a plurality of third mounting holes B66 for mounting additional components such as a circuit board B10 and the like on the other surface of the plate portion B61 through the plurality of third mounting holes B66; a plurality of positioning holes B67 for positioning to a molding die for molding substrate support B6, the plurality of positioning holes B67; a plurality of positioning protrusions B68 for positioning the light emitting diode substrate B3, the plurality of positioning protrusions B68; a first logo B69a and a second logo B69B, the first logo B69a and the second logo B69B being convex for preventing mounting errors of the light emitting diode substrate B3; and a rotation stop hole B60, the rotation stop hole B60 being disposed around one first mounting hole B64.

The first mounting holes B64 are arranged so as to be separated in one direction, and the plurality of mounting holes B64 in one direction form a hole row in which a plurality of rows are arranged in parallel. The second mounting holes B65 are provided between two first mounting holes B64 and B64 provided for one led board B3, are arranged at a plurality of positions apart from each other, and have the same size as the first mounting holes B64.

The third mounting hole B66 is formed between two mounting holes B64 formed in one led board B3 and at a position facing the led board B3, and the third mounting hole B66 is blocked by the led board B3. The periphery of the third mounting hole B66 is recessed toward the other surface side so that the end of the shaft member fitted into the third mounting hole B66 from the other surface side does not contact the light emitting diode substrate B3. The positioning hole B67 is opened between two first mounting holes B64 opened for one light emitting diode substrate B3, and the positioning hole B67 and the light emitting diode substrate B3 are arranged at three positions separated from each other so as to face each other, so that the positioning hole B67 is blocked by the light emitting diode substrate B3. The positioning convex portion B68 is shaped such that the one surface side forms a protrusion on a part of a position opposing the peripheral portion of each light emitting diode substrate B3. The diameter of the rotation stop hole B60 is smaller than that of the first mounting hole B64, and the rotation stop hole B60 is opened at a position slightly apart from the first mounting hole B64 disposed at the center of the plate portion B61.

As shown in fig. 8, a plurality of rows of circuit board groups are accommodated and supported on one surface of the plate portion B61, a power supply circuit board B10a connected to one light emitting diode board B3 of each circuit board group via a second connector B41 is mounted on one longitudinal side portion of the other surface of the plate portion B61, and a control circuit board B10B for driving and controlling the display portion a is mounted on the other longitudinal side portion.

As shown in fig. 8, a lead-out hole B61a is opened in one side portion in the longitudinal direction of the plate portion B61, the lead-out hole B61a is used to lead out the lead wire B40 included in each second connector B41 to the other surface side of the plate portion B61, and a lead wire holder B9 is attached to the outside of the lead-out hole B61 a. As shown in fig. 21, a plurality of concave portions B61B are provided at the inner edge of the lead-out hole B61a, and a concave catching portion B61c is provided around the lead-out hole B61 a.

A signal processing circuit board B10c is mounted below the longitudinal center portion of the other surface of the plate portion B61, and processes a video signal displayed on the display surface of the display portion a. In addition, the structure is as follows: that is, mounting holes corresponding to the holes of the display unit a are formed at a plurality of circumferential positions of the visor sheet B63, and the display unit a and the substrate support body B6 are coupled by male screws.

< Structure of light-emitting diode substrate B3 >

As shown in fig. 9, the light emitting diode board B3 has a rectangular shape, and has a circuit portion on one surface, a light emitting diode B1 and a lens B2 are mounted on the one surface, a convex or concave connection portion B31 is provided on one surface of one end portion, and a concave or convex connection portion B32 is provided on one surface of the other end portion. The light emitting diode substrate B3 has the following structure: that is, through holes B33 and B34 corresponding to the first mounting hole B64 are opened at both ends, positioning recesses B35 corresponding to the two positioning protrusions B68 are opened at two positions between the through holes B33 and B34, an insertion hole B36 corresponding to the second mounting hole B65 is opened between the positioning recesses B35 and B35, and a first concave mark B37 corresponding to the first mark B69a is provided at one end in the longitudinal direction, so that it is possible to prevent the light emitting diode substrates B3 having different connection part structures at both ends from being arranged in an incorrect direction, and further, it is possible to prevent the two kinds of light emitting diode substrates B3 (first substrate and second substrate) from being arranged in an incorrect manner by providing second concave marks B38 corresponding to the second mark B69B at both sides in the width direction of one end in the longitudinal direction. A positioning recess B35 is provided at a position opposite to the rotation stop hole B60. As shown in fig. 10, a plurality of light emitting diode substrates B3 having the same length or different lengths are arranged side by side in one direction to constitute a circuit substrate group. For example, as shown in fig. 5 and 10, the following structure is adopted: that is, the circuit board groups having different lengths can be formed by selecting any one of the three types of short-length light-emitting diode boards having 5 light-emitting diodes B1 mounted at equal intervals, medium-length light-emitting diode boards having 6 light-emitting diodes B1 mounted at equal intervals, and long-length light-emitting diode boards having 7 or 8 light-emitting diodes B1 mounted at equal intervals, and combining them in one direction.

Since the luminance of the led B1 varies greatly, the circuit board group has a configuration in which the high-luminance led B1 and the low-luminance led B1 are alternately arranged in parallel to reduce the luminance unevenness, and the led board B3 includes a first board in which the leds B1 are arranged in the order of high luminance and low luminance and a second board in which the leds B1 are arranged in the order of low luminance and high luminance, and the two kinds of the first board and the second board are distinguished by colors, so that they can be recognized at first glance.

The size of the through hole B33 formed in one end portion of the led board B3 is smaller than that of the through hole B34 formed in the other end portion, so that the gap between the small-sized through hole B33 and the shaft body B7 fitted therein is extremely small, and the gap between the large-sized through hole B34 and the shaft body B7 fitted therein is large, whereby the large-sized through hole B34 side can be moved in the width direction about the shaft body B7 fitted in the small-sized through hole B33, and an overload can be prevented from being applied to the connector B4 that connects the end portions of the led boards B3 arranged side by side in the column direction.

The sizes of the positioning recesses B35 and B35 provided at two positions of one led substrate B3 are different depending on the length of the led substrate B3, the size between the positioning recesses B35 and B35 is small for the short led substrate B3, the size between the positioning recesses B35 and B35 is medium for the medium led substrate B3, and the size between the positioning recesses B35 and B35 is long for the long led substrate B3, so that it is possible to prevent the erroneous arrangement of the led substrates B3 having different lengths.

When the first mark B37 is formed by cutting a part of one end in the longitudinal direction into a concave shape, the first mark B69a is arranged in the mark B37, and the light emitting diode substrates B3 having different connection structures at both ends are arranged in the wrong direction, the first mark B69a is hidden by the light emitting diode substrate B3 and cannot be recognized, and it can be confirmed that the arrangement direction of the light emitting diode substrate B3 is wrong. The second mark B38 is formed by cutting out both sides in the width direction at one end in the longitudinal direction into a concave shape, the second marker B69B is disposed in the mark B38, and when the first substrate and the second substrate of the led substrate B3 are disposed in a wrong manner, the second marker B69B is hidden by the led substrate B3 and cannot be recognized, so that it can be confirmed that the type of the led substrate B3 is wrong.

< Structure of lens B2 >

As shown in fig. 6 and 11, the lens B2 is separated from and opposed to the top of the light emitting diode B1, and includes a light transmitting portion B21 having a thick circular plate shape and three protrusions B22, the light transmitting portion B21 having a hemispherical recess for diffusing the light emitted from the light emitting diode B1 to the four sides, the protrusions B22 protruding from the light transmitting portion B21 facing the light emitting diode B1 toward the light emitting diode substrate B3, and the tips of the protrusions B22 are attached to the periphery of the light emitting diode B1 on the one surface of the light emitting diode substrate B3 with an adhesive. Fig. 12 shows the amount of light emitted from the light emitting diode according to the emission angle of the light. The measurement position of the amount of luminescence was a position 20mm apart from the light emitting diode B1. As is clear from fig. 12, no light is emitted at a light emission angle of 70 degrees or more with respect to the light emission angle of zero degrees (the vertex of the light emitting diode B1).

< construction of shaft body B7 >

The shaft body B7 fitted into the first mounting hole B64 to fix both ends of the light emitting diode board B3 is common to the shaft body B7 fitted into the second mounting hole B65 to suppress the reflection sheet B5 from being biased in a direction away from the light emitting diode board B3. Since the through holes B33 and B34 are provided at both ends of the light emitting diode board B3, the shaft bodies B7 are fitted into the first mounting holes B64 from the through holes B33 and B3 at both ends, so that even in a configuration in which a plurality of light emitting diode boards B3 are provided side by side as shown in fig. 10, the shaft bodies B7 and the fitting shaft bodies B7 are not forgotten to be fitted, and both ends of the light emitting diode board B3 can be reliably fixed. As shown in fig. 13A, 13B, 14A, and 14B, the shaft body B7 includes a flexible tube B71 made of synthetic resin and a pin B72 made of synthetic resin fitted into the flexible tube B71. The flexible tube B71 has a head portion B71a with a small diameter at one end and a plurality of notches B71B and inwardly projecting raised portions at the other end side in the axial length direction, and the component pieces between the notches B71B are radially bendable, and the flexible tube B71 is fitted into the through hole B33 or B34 and the first mounting hole B64, so that the head portion B71a is brought into contact with one surface of the light-emitting diode board B3, and the light-emitting diode board B3 is pressed against the plate portion B61.

Pin B72 is opposed to head B71a of flexible tube B71 in the axial direction, and has head B72a at one end thereof, which is larger in diameter than head B71a, and pin B72 is fitted into flexible tube B71, so that the part sheet between notches B71B of flexible tube B71 is bent radially outward outside mounting hole B64, and is not pulled out from mounting hole B64, and a space longer in size than the thickness of reflector B5 is generated between the inner surface of the peripheral portion of head B72a and the one surface of led board B3, so that when heat generated when light is emitted from led B1 causes thermal expansion of reflector B5, expansion of reflector B5 due to the thermal expansion is allowed, and wrinkles of reflector B5 are prevented. As shown in fig. 14A and 14B, there are pin B72 whose head portion B72a is circular, and pin B72 whose head portion B72a is oblong. A rotation stop pin B73 fitted into the rotation stop hole B60 and one positioning recess B35 is integrally formed on one longitudinal side of the head portion B72a of the pin B72 having the oblong head portion B72 a.

As shown in fig. 6, the shaft body B7 has the following structure: that is, by forming the dimension from the one surface of the led board B3 to the tip of the head B72a to be shorter than the dimension from the one surface of the led board B3 to the tip of the lens B2, interference between light diffused by the lens B2 and the head B72a of the shaft B7 can be reduced, and luminance unevenness caused by the shaft B7 can be prevented.

As shown in fig. 15, a plurality of recesses B74 are provided in the inner surface of the head portion B72a facing the one surface of the light emitting diode substrate B3, and the recesses B74 are recessed toward the tip side with a part in the circumferential direction left, and are open to the periphery. By the recess B74, a space into which the tip of a tool such as a driver is inserted is created between the recess B74 and one surface of the led board B3, and the pin B72 can be easily removed by the tool. The recessed portions B74 are provided in three equal parts as shown in fig. 13B, but may be provided in four equal parts or may be one or two, and the number thereof is not particularly limited.

< construction of reflection sheet B5 >

A synthetic resin sheet material having high reflectivity is formed to form a reflection sheet B5, as shown in fig. 5 and 16, the reflection sheet B5 includes a substantially rectangular flat portion B51 and a frame portion B52 bent at a first folding line B5a formed at the periphery of the flat portion B51, and the reflection sheet B5 is formed in a case shape when bent at the first folding line B5 a.

A flat portion B51 is provided with first holes B53, second holes B54, and third holes B55, the first holes B53 are arranged in a lattice shape, the inside thereof is provided with lenses B2, the second holes B54 are fitted with shafts B7 for fixing the led board B3, the third holes B55 are fitted with support pins B8 or shafts B7 for suppressing the deflection of the reflective sheet B5 in a direction away from the led board B3, a pair of cutouts B56 are provided at positions facing the connectors B4, the pair of cutouts B56 are opposed in parallel in a direction away from the sheet surface, when the reflective sheet B5 is placed on the led boards B3 connected by the connectors B4, a portion between the pair of cutouts B56 is deflected in the thickness direction, and a portion facing the connector B4 can be reflected by the reflective sheet, as shown in fig. 16, an elongated hole B57 is provided, and the elongated hole B57 is continuous with one second hole B54 at the center side and opposed to the rotation stop hole B60 via one positioning recess B35.

As shown in fig. 17, three second folding lines B5B extending from the corner B51a of the flat portion B51 to the periphery of the corner B52a of the frame portion B52 are provided between the corner B51a of the flat portion B51 and the periphery of the corner B52a of the frame portion B52, and the second folding lines B5B are folded so that no gap or step occurs in the corner B52a of the frame portion B52.

As shown in fig. 11, the diameter of the first hole B53 is formed slightly larger than the light-transmitting portion B21 of the lens B2, and the light-transmitting portion B21 is disposed on the side of the flat portion B51 closer to the optical sheet C, so that when the reflector sheet B5 is thermally expanded by light emitted from the light-emitting diode B1, the reflector sheet B5 is allowed to expand and contract in the gap between the peripheral surface of the light-transmitting portion B21 and the first hole B53 due to the thermal expansion. The second hole B54 has the following structure: that is, is smaller than the first hole B53 and larger than the head B72a, and is connected to one side of the adjacent first hole B53, so that it can absorb expansion and contraction caused by thermal expansion of the reflective sheet B5. In addition, one second hole B54 at the center side, i.e., the second hole B54 connected to the long hole B57 is separated from the first hole B53.

The third hole B55 is formed smaller than the second hole B54 and the head B71a of the flexible tube B71. Around the third hole B55 into which the support pin B8 is fitted, a recognition portion B55a of a fine hole is provided, but around the third hole B55 into which the shaft body B7 that biases the reflection suppressing sheet B5 in the direction of separating from the light emitting diode substrate B3 is fitted, a recognition portion B55a is not provided. The recognition unit B55a is disposed at a position having a larger diameter than the head B72a of the shaft body B7, and when the shaft body B7 is inserted into the third hole B55 by mistake as the support pin B8, the recognition unit B55a is exposed, and it is known that an error has occurred.

As shown in fig. 16, the cutouts B56 are separated in the direction of arranging the circuit board groups arranged in a plurality of rows (the direction orthogonal to the rows), and the opposing directions are alternately changed, so that the cutouts B56 and B56 are biased in the thickness direction with the non-cutout portions between both ends of the cutouts B56 and B56 as starting points, and the biased portions are opposed to the connectors B4. In this configuration, since the highly reflective reflection sheet B5 having high reflectivity at the portion facing each connector B4 is biased from the non-cut portion between both ends of the notch B56 and B56 as the starting point, the inclination from the apex of the biased portion to the non-cut portion with respect to the flat portion B51 can be reduced. As a result, as shown in fig. 4, even when the number of the connectors B4 arranged side by side is large, the inclination can be reduced by the bias of the portion facing each connector B4, and the light reflectivity in the direction perpendicular to the sheet surface can be improved, and further appropriate luminance characteristics can be ensured.

As shown in fig. 14B, one second hole B54 at the center side connected to the long hole B57 adopts the following structure: that is, the diameter thereof is smaller than that of the flexible tube B71, and the head B71a presses only the periphery of one second hole B54 of the reflection sheet B5 against one surface of the light emitting diode substrate B3, whereby the reflection sheet B5 can be positioned regardless of expansion and contraction due to thermal expansion of the reflection sheet B5. The long hole B57, which is a misalignment preventing hole, has substantially the same width as the rotation preventing pin B73, is a hole that is long in the direction away from the one second hole B54 on the center side, and contacts the circumferential surface of the rotation preventing pin B73 to prevent the reflection sheet B5 from being misaligned in the circumferential direction, so that the positional relationship between the first hole B53 and the lens B2 can be maintained.

< Structure of support Pin >

As shown in fig. 18, the support pin B8 includes a flexible tube B81 made of synthetic resin, a pin B82 made of synthetic resin and fitted into the flexible tube B81, and a column portion B83 integrally formed with the pin B82. The flexible tube B81 has a head portion B81a with a small diameter at one end thereof and a plurality of notches B81B and inwardly projecting raised portions at the other end side thereof in the axial length direction, and the component pieces between the notches B81B are radially bendable, and the flexible tube B81 is fitted into the third hole B55 and the second mounting hole B65, so that the head portion B81a is brought into contact with one surface of the light-emitting diode board B3, and the light-emitting diode board B3 is pressed against the plate portion B61.

The pin B82 is opposed to the head B81a of the flexible tube B81 in the axial direction, and has a head B82a at one end thereof, which is larger in diameter than the head B81a and the head B72a of the shaft B7, and the pin B82 is fitted into the flexible tube B81, so that the component sheet between the notches B81B of the flexible tube B81 is bent radially outward outside the second mounting hole B65, and is not pulled out from the mounting hole B65, and a space longer than the thickness of the reflector sheet B5 is created between the inner surface of the peripheral portion of the head B82a and the one surface of the led board B3, whereby when the light emitted from the led B1 causes thermal expansion of the reflector sheet B5, the reflector sheet B5 is allowed to expand and contract due to the thermal expansion, and wrinkles of the reflector sheet B5 are prevented. The columnar portion B83 adopts the following structure: that is, the optical sheet C is prevented from being bent toward the led substrate B3 side by forming a substantially tapered shape from the head portion B82a and by slightly separating and facing the optical sheet C at the tip. The head B82a adopts the following structure: that is, the size of the identification portion B55a of the reflection sheet B5 is covered when the support pin B8 is fitted into the third hole B55, and the identification portion B55a is exposed to the outside of the head portion B82a when the shaft body B7 is erroneously fitted into the third hole B55.

< Structure of wire holder >

As shown in fig. 19, 20, and 22, the wire holder B9 is fitted around the lead-out hole B61a, and includes a substantially rectangular protective tube B91 and a cover B92 that closes the open end of the protective tube B91. A recessed portion B91a is provided inside the protector B91, and the recessed portion B91a is disposed parallel to the plate portion B61 and is connected to the lead-out hole B61a, so that the lead wire B40 led out from the lead-out hole B61a can be collected. A convex engaged portion B91B is provided at one side open end of the protection tube B91, the engaged portion B91B is inserted into the concave portion B61B and is engaged with the edge portion of the guide hole B61a by sliding, a pivot support convex portion B91c is provided at one side of the protection tube B91, a engaged portion B91d engaged with the engaging portion B61c is provided at the other side of the protection tube B91, and the protection tube B91 is attached around the guide hole B61a by the engaged portion B91B and the engaged portion B91 d. The other side opening portion of the protection tube B91 is provided with a plurality of concave locking portions B91 e.

The cover B92 is plate-shaped, and has a peripheral portion provided on one side thereof with a locked portion B92a locked by the pivot supporting convex portion B91c and on the other side with a convex locked portion B92B locked by the locked portion B91e, and the cover B92 holds the lead wire B40 held in the concave portion B91a between the concave portion B91a of the protection tube B91 and the cover B92 when the cover B92 is rotated in the closing direction with the locked portion B92a as a fulcrum to close the open end of the protection tube B91. As a result, as shown in fig. 2, the lead wire B40 of the connector B2 connected to the circuit board group can be held in the recess B91a in a short time, and the lead wire B40 can be easily wired.

< Structure of optical sheet C >

The optical sheet C is a laminate in which a thick diffusion plate that diffuses light emitted from the light emitting diode B1 as a light source and a thin synthetic resin sheet including a reflective polarizing plate, a prism sheet, a diffusion sheet, and the like are laminated, and the peripheral portion of the optical sheet C is supported by the overhang B63 of the substrate support B6.

< Structure of housing D >

The housing D has a housing front division D1 for shielding the front side of the peripheral portion of the display section a and a deep-disk-shaped housing rear division D2 for shielding the peripheral portion and the rear side of the light source device B, and is attached to the visor B63 of the substrate support body B6 by male screws.

The display device having the above structure is assembled by the following steps (1) to (8).

(1) The display unit a is formed by placing the display panel a1 on the rear holding frame A3 placed flat on the console, placing the front holding frame a2 on the display panel a1, and joining the front holding frame a2 and the rear holding frame A3 with male screws.

(2) A plurality of light-emitting diode substrates B3 adjacent in one direction are arranged side by side on one surface of plate portion B61 of substrate support B6 with the open side facing upward, as shown in fig. 7, with substrate support B6 on which circuit substrate B10 is not mounted laid flat on another table. In this case, for example, the short led substrates on which 5 leds B1 are mounted are arranged in a row, the medium led substrates on which 6 leds B1 are mounted are arranged in a row, and the short led substrates on which 5 leds B1 are mounted are arranged in a row, whereby a circuit substrate group is constituted by the adjacent led substrates B3 in one direction. The short led substrates arranged side by side first are connected in advance to the second connector B41, the middle led substrate is connected to the connector B4, and the short led substrates arranged side by side last are connected to the short-circuit connector.

Since the plate portion B61 is provided with the positioning convex portion B68, the first mark B69a, and the second mark B69B, and the led board B3 is provided with the positioning concave portion B35, the first mark 37, and the second mark 38, when the circuit board group is constituted, the positioning concave portion B35 of the led board B3 is engaged with the positioning convex portion B68, so that the led boards B3 having different lengths can be arranged side by side at an appropriate position, and the first mark 37 is matched with the first mark B69a, and the second mark 38 is matched with the second mark B69B, so that the led boards B3 having different connecting portions at both ends and different arranging orders of the high-luminance and low-luminance led boards B1 can be arranged side by side at appropriate positions. When the led boards to which the second connector B41 is connected are arranged side by side, the lead wires B40 of the second connector B41 are led out from the lead-out holes B61a to the outside of the board support body B6.

(3) The shaft bodies B7 fix both ends of the light emitting diode substrate B3 arranged side by side in the substrate support body B6 to the plate portion B61. At this time, the shaft body B7 is inserted through the through holes B33 and B34 provided in the opposite end portions of each light emitting diode substrate B3 in this order, and the shaft body B7 is fitted into the mounting hole B64 of the plate portion B61, whereby each light emitting diode substrate B3 is fixed to the substrate support body B6. At this time, after the shaft body B7 is fitted into the through hole B33 provided at one end of the led board B3, the shaft body B7 is fitted into the through hole B34 provided at the other end of the led board B3. Since the through hole B33 that is fitted into the shaft body B7 first is smaller than the through hole B34 that is fitted into the shaft body B7 second, even if the through hole B34 provided at the other end portion is slightly displaced from the mounting hole B64, the displacement is absorbed and the light emitting diode substrate B3 is fixed, and an overload can be prevented from being applied to the connector B4. Further, the shaft body B7 is fitted into one of the mounting holes B64 on the center side by the following process, and the shaft body B7 having the detent pin B73 is fitted into this mounting hole B64.

(4) The reflection sheet B5 was placed on one surface of the light emitting diode substrate B3 fixed to the plate portion B61 of the substrate support B6, and the peripheral portion of the reflection sheet B5 was placed on the overhang sheet B63 of the substrate support B6. At this time, the lens B2 is disposed in the first hole B53 of the reflective sheet B5.

(5) The third hole B55 of the reflection sheet B5 is sequentially inserted through either one of the support pin B8 and the shaft body B7 for suppressing the bias of the reflection sheet B5 in the direction of separating from the light emitting diode substrate B3, and the support pin B8 or the shaft body B7 is fitted into the fitting hole B36 and the second mounting hole B65. At this time, the diameter of the head portion B72a of the shaft body B7 is larger than that of the third hole B55, and the inner surface of the head portion B72a faces the periphery of the third hole B55 of the reflection sheet B5, so that the reflection sheet B5 can be prevented from being biased in a direction away from the light emitting diode substrate B3.

The flexible tube B71 having the shaft body B7 of the rotation stopper pin B73 is fitted into the one second hole B54 on the center side of the reflection sheet B5, and the rotation stopper pin B73 is fitted into the elongated hole B57, the one positioning recess B35, and the rotation stopper hole B60, whereby the reflection sheet B5 can be prevented from being displaced in the circumferential direction.

(6) An optical sheet C is placed on the peripheral portion of a reflection sheet B5, the reflection sheet B5 is placed on a visor B63 of a substrate support B6, a display portion a is placed on the optical sheet C, male screws are inserted through insertion holes formed in the peripheral portion of the display portion a, the male screws are screwed into mounting holes formed in the visor B63, and the optical sheet C is sandwiched between the display portion a and a substrate support B6 to fix the display portion a to the substrate support B6. At this time, the support pin B8 can suppress the optical sheet C from being bent.

(7) The table is reversed so that display unit a faces downward and substrate support B6 faces upward, and a plurality of circuit substrates B10 are mounted in third mounting holes B66 of plate portion B61, and held by wire holders B9 by gathering and holding wires B40 of second connector B41.

(8) The display device is formed by placing the display section a and the substrate support body B6 on the housing front split D1 placed flat on the console, placing the display section a downward and the substrate support body B6 upward, placing the housing rear split D2 on the substrate support body B6, and joining the peripheral side of the housing rear split D2, the eave B63 of the substrate support body B6, and the peripheral side of the housing front split D1 with male screws.

< other construction of display device >

Fig. 23 is a development view showing another structure of a corner portion of the reflection sheet, fig. 24 is a front view showing another structure of a connector-facing portion of the reflection sheet, fig. 25 is a front view showing another structure of the light source device, fig. 26 is a schematic front view showing another structure of the substrate support, fig. 27 is a schematic front view showing another structure of the reflection sheet, and fig. 28 is a cross-sectional view showing another relationship between the reflection sheet and the shaft body.

< other construction of the reflection sheet B5 >

As shown in fig. 23, the following structure may be adopted: that is, a substantially V-shaped cut-out portion B58 is provided at a corner portion B52a of a frame portion B52 of the reflection sheet B5, four frame portions B52 connected to four sides of a flat portion B51 are bent at a first folding line B5a so as to be inclined with respect to the flat portion B51, and then both edge portions B58a and B58a of the cut-out portion B58 are joined together and held in the joined state by a joining tool such as a double-sided tape.

As shown in fig. 24, the following structure may be adopted: that is, two substantially U-shaped notches B59 are provided in the portion of the reflection sheet B5 facing the connector B4, and the reflection sheet B5 is biased parallel to the sheet surface from two bias starting points between the notches B59 and B59 to improve the bias in the thickness direction of the portion facing the connector B4, the notches B59 being formed by long sides facing each other while being separated in the direction along the sheet surface and two short sides extending from both ends of the long sides toward the side where the distance between the long sides becomes shorter.

< other relationship between the shaft body B7 and the reflection sheet B5 >

Since the light reflectance of the shaft bodies B7 that fix both end portions of the light emitting diode substrate B3 is inferior to that of the reflection sheet B5, as shown in fig. 25, the shaft bodies B7 that fix one end portion of the light emitting diode substrates B3 arranged in a plurality of rows are arranged in a staggered manner in a direction orthogonal to the row direction, and the shaft bodies B7 that fix the other end portion of the light emitting diode substrate B3 are arranged in a staggered manner in a direction orthogonal to the row direction, so that the positions where the luminance unevenness due to the shaft bodies B7 occurs are diffused and made inconspicuous.

In this case, as shown in fig. 26, the first mounting holes B64 and the positioning projections B68 adjacent to each other in the direction orthogonal to the column direction of the light emitting diode substrate B3 are arranged in a staggered manner in the column direction. The light emitting diode substrate B3 includes a first light emitting diode substrate having a short size from both ends to the through holes B33 and B34 and a second light emitting diode substrate having a long size from both ends to the through holes B33 and B34, and the first light emitting diode substrate and the second light emitting diode substrate are alternately arranged in a direction orthogonal to the column direction, so that the through holes B33 and B34 are arranged in a staggered manner corresponding to the first mounting holes B64 arranged in a staggered manner, and the shaft bodies B7 fitted into the through holes B33 and B34 are arranged in a staggered manner in a direction orthogonal to the column direction.

The elongated hole B57 for preventing the displacement of the reflection sheet B5 in the circumferential direction may be configured to be continuous with the single second hole B54 disposed at the center of the reflection sheet B5, and may be an elongated hole B57 formed at the single second hole B54 disposed at the peripheral side of the reflection sheet B5 as shown in fig. 28. In this case, the elongated hole B57 has a width substantially the same as the width of the head portion B71a of the shaft body B7, is a hole that is long in the direction away from the one second hole B54 disposed on the center side, and is in contact with the circumferential surface of the head portion B71a to prevent the reflector sheet B5 from being displaced in the circumferential direction, and in addition, a shaft body B7 having a circular head portion B72a is fitted into the second hole B54 disposed on the center side of the reflector sheet B5, instead of the pin B72 having an oblong head portion B72 a. In addition, the long hole B57 may be connected to the first hole B53 of the reflection sheet B5 as shown in fig. 28, or may be separated from the first hole B53.

Embodiments 1-1 to 12-2 of the present invention are described in detail below with reference to the drawings. Note that, for the components corresponding to the components shown in fig. 1 to 28, the reference numerals used for the components shown in fig. 1 to 28 are attached with parentheses to clarify that they are the same as the components shown in fig. 1 to 28.

Embodiment mode 1 to 1

Fig. 29 is a perspective view showing a structure of a light source device according to the present invention, fig. 30 is a plan view showing the structure of the light source device, fig. 31 is a plan view showing a structure in which a reflection sheet of the light source device is omitted, and fig. 32 is a cross-sectional view showing a part of the structure of the light source device in an enlarged manner.

The illustrated light source device (B) is mounted on the rear side of a display unit in a thin display device including the display unit (a) having a substantially rectangular parallelepiped front side with a display surface, and includes: a plurality of light emitting diodes 1(B1), the plurality of light emitting diodes 1(B1) being arranged side by side in a lattice shape as a light source; a plurality of light-emitting diode substrates 2(B3) on which the light-emitting diodes 1 are mounted on one surface 2a, the light-emitting diode substrates 2(B3) being arranged in a plurality of rows; a plurality of connectors 3(B4), the plurality of connectors 3(B4) connecting the adjacent light emitting diode substrates 2, 2 to each other; a plurality of lenses 4(B2), the plurality of lenses 4(B2) being mounted on the one surface 2a of the light emitting diode substrate 2 so as to face the top of the light emitting diode 1, and scattering light emitted from the light emitting diode 1; a reflection sheet 5(B5), the reflection sheet 5(B5) having a through hole 5a (first hole B53) for disposing the lens 4 therein, and reflecting the light diffused by the lens 4 so as to face the one surface 2a and the one surface of the connector 3; and a support case 6 (substrate support body B6), the support case 6 (substrate support body B6) accommodating and supporting the plurality of rows of light emitting diode substrates 2 in parallel.

The light emitting diode substrate 2 has a rectangular shape having a circuit portion on one surface 2a, and a plurality of rows of the light emitting diode substrates 2 are provided on one surface 6a of a substantially rectangular support case 6 so as to be separated in the longitudinal direction and the width direction. As shown in fig. 31, a plurality of light emitting diodes 1 are mounted on one surface 2a of each of the light emitting diode substrates 2 so as to be separated in the longitudinal direction, and connection portions 21 and 22(B31 and B32) are provided at both longitudinal end portions of the one surface 2 a.

In the light emitting diode substrates 2 arranged in parallel in a plurality of rows with one end in the longitudinal direction facing each other, in the light emitting diode substrates 2, two adjacent connection portions 21, 21 of the light emitting diode substrates 2 in each row are connected to each other by a connector 3, the connection portion 22 of one light emitting diode substrate 2 is connected to a power supply circuit substrate mounted on the rear surface of the support case 6 by a second connector (B41), and the connection portion 22 of the other light emitting diode substrate 2 is connected to a short-circuit connector.

The support case 6 is formed by molding a metal plate, and includes a plate portion 61(B61) having a substantially rectangular flat shape and a frame portion 62(B62) connected to the periphery of the plate portion 61 and having an open front side, and the light emitting diode substrates 2 are housed and supported in parallel in the longitudinal direction and the width direction on the front surface 6a of the plate portion 61. The frame piece connected to the four sides of the plate portion 61 is bent to form a frame portion 62.

On the rear surface of the plate portion 61, a plurality of circuit boards such as a power circuit board connected to the connection portion 22 of the light emitting diode board 2 via the second connector and a control circuit board for driving and controlling the display portion are mounted (B10).

Fig. 33 is a plan view showing the structure of the reflection sheet, fig. 34 is an enlarged front view showing the structure of a main portion of the reflection sheet when the reflection sheet is unfolded, fig. 35 is an enlarged front view showing the structure of a main portion of the reflection sheet, and fig. 36 is an enlarged cross-sectional plan view showing the structure of a reflection sheet portion. The reflection sheet 5(B5) is formed from a rectangular synthetic resin sheet material having high reflectivity, and includes: a flat portion 51(B51) smaller than the plate portion 61 of the support case 6; and a frame portion 52(B52) which is connected to the entire periphery of the flat portion 51 at four first folding lines 5B (B5a) and is foldable, wherein a second folding line 53(B5B) as a perforation line is provided between each corner portion 51a (B51a) of the flat portion 51 and the periphery of the corner portion 52a (B52a) of the frame portion 52, and the frame portion 52 is folded at the first folding line 5B and the second folding line 53, thereby forming a case shape in which the frame portion 52 is inclined outward with respect to the flat portion 51 and is open at the front side. Further, the first folding line 5b and the second folding line 53 are perforated lines.

The second folding lines 53 are three in number, and extend from the corner 51a of the flat portion 51 to the periphery of the corner 52a of the frame portion 52, the folding line 53a in the center is folded to be concave, and the folding lines 53b, 53b on both sides are folded to be convex, so that the folding lines 53b, 53b on both sides are joined together without a step in the thickness direction. A cut-out portion 54 cut out in a substantially L-shape is provided in the outer peripheral portion of the corner portion 52a of the frame portion 52.

The two bent portions 53c and 53c bent at the three folding lines 53a, and 53b are overlapped to form a plate shape, and the bent portions 53c and 53c are joined by an adhesive tape 55 such as a double-sided tape, thereby maintaining the bent state of the frame body portion 52, in other words, the shape of the frame body portion 52.

A bias portion capable of being biased in the thickness direction by a plurality of cuts separated and facing in the direction along the sheet surface is provided at a portion of the flat portion 51 facing the outer peripheral portion of the connector 3, and a through hole 5a (first hole B53) slightly larger in diameter than the lens 4 is opened at a portion of the flat portion 51 corresponding to the lens 4, respectively, and the lens 4 is disposed inside the through hole 5 a.

Further, four eaves 56 are provided integrally with the reflection sheet 5, and the four eaves 56 are connected to the four sides of the frame portion 52 having a rectangular periphery at the third folding line 5c and extend outward in parallel with the flat portion 51.

Two eaves 56, 56 opposed to each other in the longitudinal direction of the reflective sheet 5 have protruding portions 56a protruding from both ends of the eaves 56, 56 in the longitudinal direction of the eaves 56, 56 than the cut-out portions 54, and when the corner portions 52a are joined together by the three second folding lines 53, one side edge of the protruding portion 56a abuts against both end edges of the remaining eaves 56, so that no gap is formed between both ends of each eaves 56.

As shown in fig. 31, for example, 5 or 6 light emitting diodes 1 are mounted separately in the longitudinal direction of the light emitting diode substrate 2, and 5 or 6 lenses 4 corresponding to the light emitting diodes 1 are mounted on one surface 2a with an adhesive.

The lens 4(B2) includes a light-transmitting portion (B21) facing the top of the light-emitting diode 1 with a separation, and three positioning protrusions (B22) each having a hemispherical concave portion for diffusing the light emitted from the light-emitting diode 1 to the periphery, and the positioning protrusions (B22) protruding from the surface of the light-transmitting portion facing the one surface 2a toward the light-emitting diode substrate 2, positioning the light-transmitting portion with respect to the light-emitting diode substrate 2, and attaching the tip of the positioning protrusions to the one surface 2a with an adhesive. The positioning projection is provided so that the distance between the light-transmitting portion and the light-emitting diode substrate 2 is slightly longer than the thickness of the reflection sheet 5, thereby absorbing the thermal expansion of the reflection sheet 5.

In the light source device configured as described above, the support case 6 is placed on the console with the open side facing upward, two light emitting diode substrates 2, 2 adjacent in the row direction are arranged in a plurality of rows on the front surface of the plate portion 61 of the support case 6, the connector 3 is connected to the connection portions 21, 21 provided at the adjacent one end portions of the light emitting diode substrates 2, 2 in each row, and the reflection sheet 5 is placed on the one surface 2a of the light emitting diode substrate 2 in each row so as to face each other. Since the reflection sheet 5 has a case shape with an open front side, the flat portion 51 faces the one surface 2a of the light emitting diode substrate 2 and the plate portion 61 of the support case 6, the frame portion 52 faces the frame portion 62 of the support case 6, and the entire surface inside the support case 6 is a reflection surface.

Since the flat portion 51 and the frame portion 52 of the reflection sheet 5 are formed by folding a single synthetic resin sheet material at the first folding line 5b and the second folding line 53, the case-shaped reflection sheet 5 can be easily obtained without generating a gap, and even if dust enters the support case 6, the dust in the support case 6 can be prevented from entering the inside of the reflection sheet 5. Further, since the corners 52a of the frame portion 52 of the reflector 5 having the shape of a housing are joined at the three second fold lines 53 so that no step is generated in the thickness direction, the luminance characteristics of the corners 52a of the frame portion 52 can be improved, and the corners 52a of the frame portion 52 can be prevented from being shaded. Further, since the cut-out portion 54 cut out in a substantially L-shape is provided in the outer edge portion of the corner portion 52a of the frame portion 52, the outer edge portion of the corner portion 52a joined together by the second fold line 53 can be prevented from protruding outward.

Fig. 37 is a cross-sectional view showing a structure of a display device including a light source device according to the present invention. The display device includes: a display unit 70(a) having a substantially rectangular parallelepiped shape, the display unit 70(a) having a display surface for displaying a television image on a front side thereof; a light source device a (b) disposed at the rear side of the display unit 70; and a housing 71(D) that covers the periphery of the display section 70 and the rear side of the light source device a.

The display unit 70(a) includes a display panel 72(a1) having a display surface, and an optical sheet 73(C) disposed behind the display panel 72. The peripheral portion of the display panel 72 is sandwiched forward and backward by the front support frame 74(a2) and the rear support frame 75(A3) to constitute a panel assembly, and the rear support frame 75 is attached to the peripheral portion of the support case 6.

The optical sheet 73 is a laminate in which a thick diffuser plate that diffuses light emitted from the light emitting diode 1 as a light source and a thin synthetic resin sheet including a reflective polarizing plate, a prism sheet, a diffusion sheet, and the like are laminated.

The support case 6 has a plate portion 61 and a frame portion 62 connected to the periphery of the plate portion 61, and supports the peripheral portion of the diffuser plate on the frame portion 62.

The housing 71 includes a housing front part 71a (D1) for shielding the front side of the peripheral portion of the display unit 70 and a deep-disk-shaped housing rear part 71b (D2) for shielding the peripheral portion and the rear side of the light source device a, and the housing 71 is attached to the frame 62 of the support case 6 by male screws.

Embodiment modes 1 to 2

Fig. 38 is an expanded front view showing another configuration of a main part of a reflection sheet provided in the light source device according to the present invention. The light source device adopts the following structure: that is, instead of providing three second folding lines 53 at the corner portions of the frame portion 52 of the reflection sheet 5(B5), a substantially V-shaped cutout portion 57 is provided at the corner portion 52a of the frame portion 52, and when four frame portions 52 connected to the four sides of the flat portion 51 are bent obliquely with respect to the flat portion 51 at the first folding line 5B, the two edge portions 57a, 57a of the cutout portion 57 are brought together, and the joined state is held by the double-sided tape 55.

The reflection sheet 5 formed of a single rectangular synthetic resin sheet material has a flat portion 51 smaller than the plate portion 61 of the support case 6 and four frame portions 52 connected to four sides of the flat portion 51 at first folding lines 5b, and the frame portions 52 are respectively folded by the first folding lines 5b in an inclined shape with respect to the flat portion 51 to form a case shape in which the frame portions 52 are inclined outward with respect to the flat portion 51 and open forward, and both edge portions 57a, 57a of the cutout portion 57 are joined together. In this state, the double-sided tape 55 is stuck to the outer surfaces of the both end portions of the adjacent frame body portion 52, and the shape of the case can be maintained. Further, the bent piece connected to the one end portion of the adjacent frame body portion 52 at the fourth folding line is provided integrally, so that the other end portion of the adjacent frame body portion 52 can be easily joined to the bent piece with the double-sided adhesive tape.

Since other configurations and operations are the same as those in embodiment 1-1, the same components are denoted by the same reference numerals, and detailed description and operational effects thereof will be omitted.

Embodiments 1 to 3

Fig. 39 is an expanded front view showing another configuration of a main portion of a reflection sheet provided in the light source device according to the present invention, and fig. 40 is an enlarged front view showing another configuration of a main portion of the reflection sheet. The light source device adopts the following structure: that is, instead of providing the cut-out portion 57 at the corner portion 52a of the frame portion 52 of the reflection sheet 5, three second fold lines 53 extending from the corner portion 51a of the flat portion 51 of the reflection sheet 5 to the periphery of the frame portion 52 and one slit 58 are provided, the corner portion 52a of the frame portion 52 is formed by the second fold lines 53, the end portions of the adjacent frame portions 52 are joined together by the slit 58, and the joined state and the corner portion 52a are held together by the double-sided tape.

The notches 58 are provided so as to extend from the corner portions 51a of the flat portion 51 along the two opposite sides of the flat portion 51, respectively, and both end portions of the two frame portions connected to the two opposite sides of the flat portion 51 have protruding portions a protruding outward from both ends of the other two frame portions toward the corner portions 51a, the protruding portions being opposed to both ends of the other two frame portions.

The protruding portion is provided with three second fold lines extending from the corner 51a to the periphery of the corner 52a (corner of the protruding portion).

In the present embodiment, the housing portion is bent from the fold line, the protruding portion is bent from the three second fold lines, the housing portion is formed into a housing shape that is inclined outward with respect to the flat portion 51 and is open at the front side, the two bent portions bent at the second fold lines are joined by a joining member such as a double-sided tape, and the edge portions formed by the notches of the adjacent housing portions are joined by an adhesive tape such as a double-sided tape to hold the housing shape.

Since other configurations and operations are the same as those in embodiment 1-1, the same components are denoted by the same reference numerals, and detailed description and operational effects thereof will be omitted.

Embodiments 1 to 4

Fig. 41A is an expanded front view showing another configuration of a main portion of the reflection sheet, and fig. 41B is a front view showing another configuration of a main portion of the reflection sheet in a state of a housing shape. Instead of using a double-sided tape as a coupling member for coupling the corner portions of the housing portion, the light source device is provided with a locking convex portion and a locking concave portion for locking the locking convex portion at the corner portion of the housing portion 52.

The corner portion 52a of the frame body portion 52 is provided with a substantially V-shaped cut-out portion 57, and when four frame body portions 52 connected to the four sides of the flat portion 51 are bent obliquely with respect to the flat portion 51 at the first folding line 5b, both edge portions 57a and 57a of the cut-out portion 57 are joined together, and the joined state is held by the locking convex portion 59a and the locking concave portion 59 b.

The front end of the clamp convex portion 59a is provided with a clamp portion for preventing disengagement. The fastener concave portion 59B is formed by a notch, and the fastener convex portion 59a is fitted into the fastener concave portion 59B, so that the state where the both edge portions 57a and 57a of the cutout portion 57 are joined together is maintained as shown in fig. 40A and 40B.

Since other configurations and operations are the same as those in embodiment 1-1, the same components are denoted by the same reference numerals, and detailed description and operational effects thereof will be omitted.

Embodiments 1 to 5

Fig. 42 and 43 are plan views showing other configurations of the reflection sheet provided in the light source device according to the present invention. The light source device adopts the following structure: that is, the corner portion 52a of the frame portion 52 of the reflection sheet 5(B5) is provided with the substantially V-shaped cutout portion 57 gradually expanding from the corner portion 51a, and when four frame portions 52 connected to four sides of the flat portion 51 are bent obliquely with respect to the flat portion 51 at the first folding line 5B, both edge portions 57B, 57B of the cutout portion 57 are overlapped in the thickness direction.

In fig. 42, the edge portions 57b and 57b of the short frame portion 52b of the four frame portions 52 overlap the upper side of the long frame portion 52c, and in fig. 43, the edge portions 57b and 57b of the long frame portion 52c of the four frame portions 52 overlap the upper side of the short frame portion 52b, and by the overlapping, no gap is generated in the corner portion 52a of the frame portion 52.

Since other configurations and operations are the same as those in embodiment 1-1, the same components are denoted by the same reference numerals, and detailed description and operational effects thereof will be omitted.

In embodiment 1 described above, a double-sided tape is used as a joining member for joining the corner portions 52a of the frame body portion 52, but alternatively, a single-sided tape may be used, or a clip may be used. The corner portion 52a of the frame portion 52 may be bonded with an adhesive, and the bonding method is not particularly limited.

Embodiment mode 2-1

Fig. 44 is a cross-sectional view showing a part of the structure of the light source device according to the present invention in an enlarged manner, fig. 45 is a plan view showing a part of the light source device omitted, fig. 46 is a schematic perspective view showing a part of the light source device in an exploded manner, fig. 47 is a plan view showing a case where no reflection sheet is provided, fig. 48 is a perspective view showing the structure of a light emitting diode substrate on which a lens is mounted, and fig. 49 is a perspective view showing the structure of a connector.

The light source device (B) shown in the figure is mounted on the rear side of a display unit in a thin display device provided with the display unit (a) having a substantially rectangular parallelepiped front side having a display surface, and includes: a plurality of light emitting diodes 1(B1), the plurality of light emitting diodes 1(B1) being arranged side by side in a lattice shape as a light source; a plurality of light-emitting diode substrates 2(B3) on which the light-emitting diodes 1 are mounted on one surface 2a, the light-emitting diode substrates 2(B3) being arranged in a plurality of rows; a plurality of connectors 3(B4), the plurality of connectors 3(B4) connecting the adjacent light emitting diode substrates 2, 2 to each other; a plurality of lenses 4(B2), the plurality of lenses 4(B2) being mounted on the one surface 2a of the light emitting diode substrate 2 so as to face the top of the light emitting diode 1, and diverging the light emitted from the light emitting diode 1; a reflection sheet 5(B5), the reflection sheet 5(B5) having a through hole 51(B53) for disposing the lens 4 therein, the reflection sheet 5(B5) facing the one surface 2a and the one surface of the connector 3 and reflecting light diffused by the lens 4; and a support 6(B6), the support 6(B6) supporting the plurality of rows of light emitting diode substrates 2 in parallel.

The light emitting diode substrate 2 has a rectangular shape having a circuit portion on one surface 2a, and the light emitting diode substrates 2 are arranged in a plurality of rows on one surface 6a of a substantially rectangular support body 6 so as to be separated in the longitudinal direction and the width direction. As shown in fig. 47, a plurality of light emitting diodes 1 are mounted on one surface 2a of each of the light emitting diode substrates 2 so as to be separated in the longitudinal direction, and connection portions 21 and 22 are provided at both longitudinal end portions of the one surface 2 a.

In the light emitting diode substrates 2 in which the light emitting diode substrates 2 are arranged in a plurality of rows with one end in the longitudinal direction facing each other, the two adjacent connection portions 21, 21 of the light emitting diode substrates 2 in each row are connected to each other by the connector 3, the connection portion 22 of one light emitting diode substrate 2 is connected to a power supply circuit substrate described later by the second connector (B41), and the connection portion 22 of the other light emitting diode substrate 2 is connected to a short-circuit connector.

The connector 3 is substantially rectangular parallelepiped and includes a plug 31 connected to one of the connection portions 21 and a socket 32 connected to the other connection portion 21, and when the connector 3 is connected to the connection portions 21, one surface of the connector 3 protrudes and the other surface overlaps with the one surface 2a of the light emitting diode substrate 2.

The reflection sheet 5 is formed of a single highly reflective synthetic resin sheet having a substantially rectangular shape corresponding to the support 6, and two slits 52, 52(B56, B59) facing each other while being separated in the direction of the sheet surface are opened at a portion facing the outer edge portion of the connector 3, and a bias portion 53 capable of being biased in the thickness direction is formed between the slits 52, 52. In the reflection sheet 5, through holes 51 are opened at portions corresponding to the lenses 4, respectively.

Fig. 50 is an enlarged plan view of a portion of the reflection sheet facing the connector, and fig. 51 is an enlarged perspective view showing a state in which the portion of the reflection sheet facing the connector is biased in the thickness direction. Two substantially U-shaped slits 52, 52 are formed by long sides 52a, 52a facing each other while being separated in the direction along the sheet surface and two short sides 52B, 52B extending from both ends of the long sides 52a, 52a toward the side where the distance between the long sides becomes shorter (B59), non-slit portions 52c, 52c between both ends of the slits 52, 52 are connected to a bias portion 53 between the slits 52, and the bias portion 53 can be biased in the thickness direction with the non-slit portions 52c, 52c as a bias starting point.

Two substantially U-shaped second slits 54, 54 are opened between the two slits 52, and the long sides 54a, 54a of the second slits 54, 54 are separated from the short sides 52b, 52b and face each other at the center, and the short sides 54b, 54b are separated from the long sides 52a, 52a and face each other at the both ends. The non-cut portions 54c, 54c between the both ends of the second cuts 54, 54 are continuous with the center portions of the long sides 52a, and the biased portions 53 can be biased in the thickness direction from the non-cut portions 54c, 54 c.

Two substantially U-shaped third slits 55, 55 are opened between the two second slits 54, and the long sides 55a, 55a of the third slits 55, 55 at the center are separated from the short sides 54b, 54b and opposed to each other, and the short sides 55b, 55b at the both ends are separated from the long sides 54a, 54a and opposed to each other. The non-cut portions 55c, 55c between the opposite ends of the third cuts 55, 55 are continuous with the center portions of the long sides 54c, and the biased portions 53 can be biased in the thickness direction from the non-cut portions 55c, 55 c.

The through hole 51 is a circular shape having a diameter slightly larger than that of the lens 4, and is arranged in a grid shape, and the lens 4 is arranged inside the through hole 51.

As shown in fig. 48, for example, 5 or 6 light emitting diodes 1 are mounted separately in the longitudinal direction of the light emitting diode substrate 2, and 5 or 6 lenses 4 corresponding to the light emitting diodes 1 are mounted on one surface 2a with an adhesive.

The lens 4 includes a light-transmitting portion 41 and three positioning projections 42, the light-transmitting portion 41 is opposed to the top of the light-emitting diode 1 with a separation, and has a hemispherical concave portion for diffusing the light emitted from the light-emitting diode 1 to the four sides, the positioning projections 42 are projected from the surface of the light-transmitting portion 41 opposed to the one surface 2a toward the light-emitting diode substrate 2, the light-transmitting portion 41 is positioned with respect to the light-emitting diode substrate 2, and the tip ends of the positioning projections 42 are attached to the one surface 2a with an adhesive.

The positioning projection 42 is used to dispose the light transmitting portion 41 on the upper side of the reflection sheet 5, in other words, to dispose the reflection sheet 5 on the side closer to the light emitting diode substrate 2 than the light transmitting portion 41, and to make the distance between the light transmitting portion 41 and the light emitting diode substrate 2 slightly longer than the thickness of the reflection sheet 5, thereby creating some space between the lower surface of the light transmitting portion 41 and one surface of the light emitting diode substrate 2, and when the reflection sheet 5 thermally expands due to heat generated when the light emitting diode 1 emits light, allowing the reflection sheet 5 to expand and contract due to the thermal expansion, so as to prevent the reflection sheet 5 from wrinkling.

The support body 6 is formed by molding a metal plate, and includes a flat plate-like plate portion 61 having a substantially rectangular shape and a frame portion 62 connected to the periphery of the plate portion 61, and the light emitting diode substrates 2 are accommodated and supported in parallel in the longitudinal direction and the width direction on one surface 6a of the plate portion 61.

A power supply circuit board connected to the connection portion 22 of the light emitting diode board 2 via a second connector is mounted on one longitudinal side of the other surface of the plate portion 61, and a control circuit board for driving and controlling the display portion is mounted on the other longitudinal side. A signal processing circuit board that processes a video signal displayed on the display surface of the display unit is mounted in the longitudinal center portion of the other surface of the plate portion 61.

In the light source device configured as described above, the support body 6 is placed on the console with the open side facing upward, two light emitting diode substrates 2, 2 adjacent in the row direction are arranged in parallel on one surface 6a of the plate portion 61 of the support body 6, the connector 3 is connected to the connection portions 21, 21 provided at one adjacent end portions of the light emitting diode substrates 2, 2 in each row, and the reflection sheet 5 is placed on one surface of the light emitting diode substrates 2 in each row so as to face each other. The bias part 53 between the notches 52 and 52 of the reflection sheet 5 faces the other surface of the connector 3 to cover the connector 3, and the lens 4 is fitted into each through hole 51 of the reflection sheet 5.

At this time, since the connection portions 21 and 22 are present on one surface of the adjacent light emitting diode substrates 2 in each row, the connector 3 connected to the connection portion 21 overlaps the one surface 2a, and the connector 3 protrudes from the one surface 2a, the biased portion 53 of the reflection sheet 5 facing the one surface of the connector 3, in other words, the portion covering the connector 3 is gradually biased in the thickness direction from the non-notched portions 52c and 52c, the non-notched portions 54c and 54c, and the non-notched portions 55c and 55c as starting points. In this way, since the portions of the reflection sheet 5 facing the connectors 3 are gradually biased by the notches 52, the second notches 54, and the third notches 55, the light reflectivity for reflecting the light emitted from the light emitting diodes 1 in the direction orthogonal to the sheet surface can be improved, and the brightness can be made uniform.

Fig. 52 is a sectional view showing a structure of a display device including a light source device according to the present invention. The display device includes: a display unit 70(a) having a display surface for displaying a television image on the front side of the display unit 70 (a); a light source device a (b) disposed at the rear side of the display unit 70; and a housing 71(D) that covers the periphery of the display section 70 and the rear side of the light source device a.

The display unit 70 includes a display panel 72(a1) having a display surface, and an optical sheet 73(C) disposed behind the display panel 72. The peripheral portion of the display panel 72 is sandwiched forward and backward by the front support frame 74(a2) and the rear support frame 75(A3) to constitute a panel assembly, and the rear support frame 75 is attached to the peripheral portion of the support body 6.

The optical sheet 73 is a laminate in which a thick diffuser plate that diffuses light emitted from the light emitting diode 1 as a light source and a thin synthetic resin sheet including a reflective polarizing plate, a prism sheet, a diffusion sheet, and the like are laminated.

The support 6 has a plate portion 61 and a frame portion 62 connected to the periphery of the plate portion 61, and supports the peripheral portion of the diffusion plate on the frame portion 62.

The housing 71 includes a housing front part 71a (D1) for shielding the front side of the peripheral portion of the display unit 70 and a deep-disk-shaped housing rear part 71b (D2) for shielding the peripheral portion and the rear side of the light source device a, and the housing 71 is attached to the frame 62 of the support body 6 by male screws.

Embodiment mode 2 to 2

Fig. 53 is an enlarged plan view showing another structure of the cutout portion of the reflection sheet provided in the light source device. The light source device is provided with substantially L-shaped slits 56, long sides 56a, 56a separated in the direction along the sheet surface, and two short sides 56b, 56b extending from one end of the long sides 56a, 56a toward the side where the distance between the long sides becomes short, instead of the two substantially U-shaped slits 52, 52 of the reflection sheet 5, and the slits 56, 56 are opposed to each other, and the long sides 56a, 56a and the short sides 56b, 56b are substantially rectangular. Non-cut portions 56c, 56c between both ends of the slits 56, 56 are connected to the bias portion 53 between the slits 56, and the bias portion 53 can be biased in the thickness direction with the non-cut portions 56c, 56c as starting points.

Between the two cutouts, two opposing cutouts 57, 57 are formed, the two cutouts 57, 57 each have a substantially L-shape, the long sides 57a, 57a and the short sides 57b, 57b each have a substantially quadrangular shape, and the corners of the two cutouts 57, 57 are opposed to the non-cutout portions 56c, 56c between the two ends of the cutouts 56, respectively. The non-cut portions 57c, 57c between both ends of the slits 57, 57 are continuous with the central portions of the slits 56, and the biased portions 53 can be biased in the thickness direction with the non-cut portions 57c, 57c as starting points.

In the present embodiment, the bias portion 53 of the reflection sheet 5 facing the connector 3 is gradually biased in the thickness direction from the non-notched portions 56c, 56c and the non-notched portions 57c, 57 c. In this way, since the portions of the reflection sheet 5 facing the connectors 3 are gradually biased by the notches 56 and the notches 57 and 57, the light reflectivity for reflecting the light emitted from the light emitting diode 1 in the direction orthogonal to the sheet surface can be improved, and the brightness can be made uniform.

Since other configurations and operations are the same as those in embodiment 2-1, the same components are denoted by the same reference numerals, and detailed description thereof and description of operational effects are omitted.

Embodiments 2 to 3

Fig. 54 is a plan view showing another structure of the cutout portion of the reflection sheet provided in the light source device. In this light source device, the two substantially U-shaped slits 52, 52 or the substantially L-shaped slits 56, 56 of the reflection sheet 5 are replaced with a pair of slits 58, 58(B56) which are separated in the sheet surface direction and face each other in parallel, and the pair of slits 58, 58 are separated in the direction in which the light emitting diode substrates 2 arranged in a plurality of rows are arranged side by side (the direction orthogonal to the rows or the direction intersecting the rows), and the facing directions are alternately changed. In other words, the portions facing the connectors 3 connected to the led boards 2 in one row are separated from each other in the row direction and face each other, the portions facing the connectors 3 connected to the led boards 2 in the adjacent row are separated from each other in the direction orthogonal to the row direction and face each other, and the pairs of cutouts 58 and 58 facing in different directions are alternately arranged at the interval of the multiple rows. When the opposing directions of the pair of slits 58, 58 arranged apart from each other in the direction in which the light emitting diode substrates 2 are arranged side by side are the same, since the pair of slits 58, 58 are arranged in parallel and the directions of the non-slit portions 58a, 58a between both ends of the slits 58, 58 are the same, the dispersion of the reflected light in the biased portion is reduced, but when the pair of slits 58, 58 are alternately arranged at the above-mentioned multiple rows of parallel arrangement intervals, the dispersion of the reflected light in the biased portion can be improved, and appropriate luminance characteristics can be secured.

The two parallel opposing slits 58, 58 are biased in the thickness direction with the non-slit portions 58a, 58a between the two ends of the slits 58, 58 as starting points. The two adjacent cutouts 58, 58 are arranged in a direction orthogonal to the non-cutout portions 58a, 58 a.

In the present embodiment, when the number of led substrates 2 arranged in a plurality of rows, that is, the number of connectors 3 arranged in parallel is large, the inclination due to the bias of the portions facing the respective connectors 3 can be reduced, the light reflectivity in the direction perpendicular to the sheet surface can be improved, and appropriate luminance characteristics can be ensured.

Since other configurations and operations are the same as those in embodiment 2-1, the same components are denoted by the same reference numerals, and detailed description thereof and description of operational effects are omitted.

Embodiments 2 to 4

Fig. 55 is a plan view showing another structure of the notch portion of the reflection sheet provided in the light source device. Instead of forming the bias portion 53 with separate opposing slits, the light source device forms the bias portion 53 with a slit 59 having a spiral shape.

The notch 59 adopts the following structure: that is, the spiral shape is formed from the starting point to the terminal, and the entire portion between both ends of the slit 59 is gradually biased when the spiral shape is brought into contact with the connector 3.

Since other configurations and operations are the same as those in embodiment 1, the same components are denoted by the same reference numerals, and detailed description thereof and description of operational effects are omitted.

Embodiments 2 to 5

Fig. 56 is a plan view showing another structure of the cutout portion of the reflection sheet provided in the light source device. Instead of forming the bias portion 53 with the circular spiral slit 59, the bias portion 53 is formed with the substantially quadrangular spiral slit 50.

The incision 50 adopts the following configuration: that is, the spiral shape is substantially a quadrangle from the starting point to the end, and the entire portion between both ends of the slit 50 is gradually biased when the spiral shape is brought into contact with the connector 3.

In the present embodiment, even when the number of the led boards 2 arranged in a plurality of rows, in other words, the number of the connectors 3 arranged in parallel is large, the distance between the slits 50 can be secured, and the number of the slits 50 arranged in parallel can be increased.

Since other configurations and operations are the same as those in embodiment 2-1, the same components are denoted by the same reference numerals, and detailed description thereof and description of operational effects are omitted.

Embodiments 2 to 6

Fig. 57 is a plan view showing another structure of the cutout portion of the reflection sheet provided in the light source device. In this light source device, one of the two substantially U-shaped slits 52, 52 is biased in a direction intersecting the opposing direction of the slits 52, and the short sides 52b, 52b at both ends of each slit 52, 52 are separated in a direction orthogonal to the opposing direction and opposed to each other, instead of the structure in which both ends of the two substantially U-shaped slits 52, 52 are brought close to each other and opposed to each other.

Short sides 52b, 52b at both ends of the two slits 52, 52 face both corners of the slits 52, non-slit portions 52c, 52c between both ends of the two slits 52, 52 and both corners of the slits 52, 52 are connected to a bias portion 53 between the slits 52, and the bias portion 53 can be biased in the thickness direction with the non-slit portions 52c, 52c as starting points.

In the present embodiment, the bias portion 53 is present between the substantially U-shaped notches 52 and 52, and the bias portion 53 of the reflection sheet 5 facing the connector 3 can be gradually biased in the thickness direction from the non-notched portions 52c and 52c by increasing the distance between the non-notched portions 52c and 52 c. Since the portion of the reflection sheet 5 facing the connector 3 is gradually biased by the long distance between the non-cutout portions 52c and 52c, the light reflectivity for reflecting the light emitted from the light emitting diode 1 in the direction perpendicular to the sheet surface can be improved, and the brightness can be made uniform.

Since other configurations and operations are the same as those in embodiment 2-1, the same components are denoted by the same reference numerals, and detailed description thereof and description of operational effects are omitted.

In embodiments 2-1 to 2-6 described above, as shown in fig. 45 and 46, the bias portions 53 formed by the slits 52 and the like are arranged at all the positions corresponding to the number of the led substrates 2 arranged in a plurality of rows, but in addition to this, the bias portions 53 may be arranged as shown in fig. 58 and 60, and the following configuration may be adopted: that is, as shown in fig. 59, the bias portion 53 is not provided, but a through hole is provided instead of the bias portion 53. Fig. 58 to 60 are perspective views showing other structures of the reflection sheet. In fig. 58, bias portions 53 formed by slits 52 and the like are provided only at portions corresponding to the light emitting diode substrates 2 at both ends in the arrangement direction of the light emitting diode substrates 2 arranged in a plurality of rows. In fig. 59, through holes 59 larger than the connector are provided only at portions corresponding to the light emitting diode substrates 2 at both ends of the light emitting diode substrates 2 arranged in a plurality of rows in the arrangement direction. In fig. 60, through holes 59 larger than the connector are provided in the portions corresponding to the light emitting diode substrates 2 at both ends in the parallel arrangement direction of the light emitting diode substrates 2 arranged in a plurality of rows, and the bias portions 53 formed by the slits 52 and the like are provided in the portions corresponding to the light emitting diode substrates 2 adjacent to the light emitting diode substrates 2 at both ends in the parallel arrangement direction. In the embodiment of fig. 58 and 60, since the connector is disposed in the bias portion 53, the reflection sheet 5 can be positioned with respect to the support body 6, and the reflection sheet 5 can be prevented from being displaced. In the embodiment of fig. 59, since the connector is disposed in the through hole 59, the reflection sheet 5 can be positioned with respect to the support 6, and the reflection sheet 5 can be prevented from being displaced.

Embodiment mode 3-1

Fig. 61 is a longitudinal sectional view schematically showing the display device.

In the figure, reference numeral 1 denotes a rectangular display panel (a1) having liquid crystal, and the display panel 1 has the following structure: that is, the voltage applied to the liquid crystal is controlled to adjust the transmittance of light, thereby displaying a video. The peripheral portion of the display panel 1 is held between the front holding frame 2(a2) and the rear holding frame 3(A3), and is housed in the front case 4(D1) having a rectangular frame shape. The front housing 4 is disposed around the front holding frame 2 and the rear holding frame 3. The front case 4 has a rectangular opening having a size corresponding to that of the display panel 1. A plurality of optical sheets 5(C) are provided on the rear side of the display panel 1, and the optical sheets 5(C) focus light from LEDs 9 (light emitting elements) described later on the display panel 1.

A diffusion plate 6 is provided on the rear side of the optical sheet 5(C), and the diffusion plate 6 uniformly diffuses the light of the LEDs 9 (B1). The diffusion plate 6 is supported by the edge portion of the deep-disk-shaped support plate 7 (B6). The LED substrate 8(B3) is provided in a plurality of rows on the front surface of the support plate 7(B6), and a film-shaped heat dissipation pattern (not shown) made of a heat conductive material, for example, a metal is formed on the rear surface of the LED substrate 8, thereby having the following structure: that is, when the LED9 is turned on, heat generated by the LED board 8 is diffused from the heat dissipation pattern to the support plate 7, thereby improving heat dissipation of the LED board 8.

A plurality of LEDs 9, 9, … …, and 9(B1) are mounted on the front surface of the LED substrate 8, and lenses 10, … …, and 10(B2) for diffusing light are disposed on the front sides of the LEDs 9, 9, … …, and 9, respectively. Three protrusions 10a, and 10a (B22) protruding toward the LED substrate 8 are provided in parallel in the circumferential direction on the peripheral portion of the lens 10, and the tip of the protrusion 10a is attached to the front surface of the LED substrate 8 with an adhesive.

Support bases (not shown) for supporting the deep-dish-shaped reflection sheet 11(B5) are provided on the left and right sides of the support plate 7, respectively. A plurality of sheet holes 11a (B53) into which the lenses 10 are inserted are opened in the bottom surface of the reflection sheet 11. Each lens 10 protrudes to the front side through the sheet hole 11 a.

The rear side of the support plate 7 is provided with a deep-disc-shaped rear housing 12 (D2). The longitudinal and transverse dimensions of the rear housing 12 are substantially the same as those of the front housing 4, and the edge portion of the rear housing 12 and the edge portion of the front housing 4 are opposed to each other. The front case 4 and the rear case 12 are provided with engaging convex portions and engaging concave portions, not shown, at their edge portions, respectively, and the front case 4 is fixed to the rear case 12 by engaging the engaging concave portions with the engaging convex portions. In the rear case 12, a plurality of circuit boards (not shown) such as a control circuit board for driving and controlling the display panel 1 and a signal processing circuit board for processing a video signal displayed on the display surface of the display panel 1 are housed, and the display panel 1 is driven based on an output signal from the circuit boards.

Fig. 62 is a front view schematically showing the LED9 provided with the reflection sheet and the LED board 8, and fig. 63 is a cross-sectional view taken along line I-I of fig. 62 schematically showing a rivet.

The LED substrate 8(B3) has a plurality of substrate holes 8a (B33, B34) arranged in parallel at equal intervals in the longitudinal direction of the LED substrate 8. As shown in fig. 63, the support plate 7(B6) has a plurality of through holes 7a (B64) formed at positions corresponding to the substrate holes 8 a. The diameter of the through hole 7a is substantially the same as the diameter of the substrate hole 8 a. The reflection sheet 11(B5) has an insertion hole 11B (B54) formed at a position corresponding to the substrate hole 8a, and the insertion hole 11B has a diameter larger than that of the substrate hole 8 a.

As shown in fig. 62, a rivet 20(B7) made of synthetic resin, a set rivet 30, and a support rivet 40(B8) are provided between the lenses.

The following structure may also be adopted: that is, instead of the synthetic resin rivet 20, a rivet 20 made of a carbon material is inserted into the substrate hole 8a and the through hole 7a, and the rivet 20 may be made of, for example, a metal, and the LED substrate 8 may be fixed to the support plate 7 by the rivet 20. The synthetic resin rivet 20 includes a receiving rivet 22(B71) and an inserting rivet 21 (B72).

The receiving rivet 22 has an annular engaging portion 22a (B71a) having a diameter larger than the diameter of the substrate hole 8a, and an outer peripheral portion of the engaging portion 22a is located outside the substrate hole 8a and inside the insertion hole 11B and is engaged with an edge portion of the substrate hole 8 a. A plurality of elastic portions 22b are provided in parallel in the circumferential direction on the inner peripheral portion of the locking portion 22 a. The elastic portion 22b protrudes in the axial direction of the locking portion 22a, and is inserted through the substrate hole 8a and the through hole 7 a. The axial dimension of the elastic portion 22b is larger than the axial dimensions of the substrate hole 8a and the through hole 7a, and the projecting end portion of the elastic portion 22b projects from the through hole 7a in the axial direction.

An abutting portion 22c that protrudes radially inward of the locking portion 22a is provided integrally with the elastic portion 22B at the protruding end portion of the elastic portion 22B, and a gap (B71B) is provided between the abutting portions 22c, 22 c.

The contact portion 22c has an inner side contacting a leg portion 21b described later, and the contact of the leg portion 21b causes the elastic portion 22b to bend outward, so that the elastic portion 22b contacts an edge portion of the through hole 7 a. Therefore, the LED board 8 and the support plate 7 are sandwiched between the engaging portion 22a and the elastic portion 22b in the front-rear direction.

The insertion rivet 21 has a head 21a (B72a) having a larger diameter than the insertion hole 11B, and a cylindrical leg 21B perpendicular to the head 21a is provided at the center of the head 21 a. A tapered portion 21ba is formed at the tip of the leg portion 21b, and the diameter of the leg portion 21b is gradually reduced toward the tip. The diameter of the leg portion 21b near the head portion 21a is substantially the same as the inner diameter of the locking portion 22a, and is larger than the dimension between the abutting portions 22c when the leg portion 21b is not inserted. The edge portion of the head portion 21a extends toward the leg portion 21b, and the extension width of the edge portion of the head portion 21a is smaller than the axial dimension of the locking portion 22a, that is, the thickness dimension of the locking portion 22 a.

The leg 21b of the insertion rivet 21 is inserted into the engagement portion 22a, and the tip end portion of the leg 21b is inserted into the gap between the abutting portions 22 c. A tapered portion 21ba is formed at the distal end portion of the leg portion 21b, and the gap is widened by inserting the leg portion 21 b. The elastic portion 22b is bent outward and abuts against the edge portion of the through hole 7 a.

The head portion 21a contacts the locking portion 22a, and the head portion 21a does not contact the reflection sheet 11. A slight gap is provided between the edge portion of the head portion 21a protruding toward the leg portion 21b and the reflection sheet 11, and when the reflection sheet 11 thermally expands due to the light emitted from the LED9, the reflection sheet 11 is allowed to expand and contract due to the thermal expansion, thereby preventing the reflection sheet 11 from being wrinkled. The edge of the head 21a holds the reflection sheet 11 to suppress the reflection sheet 11 from being biased in the thickness direction. The support plate 7 and the LED board 8 are held between the elastic portions 22b and the engaging portions 22a with an appropriate pressure, and the LED board 8 is brought into close contact with the support plate 7.

Next, the set rivet 30 will be described. FIG. 64 is a cross-sectional view taken along line II-II of FIG. 62, schematically illustrating the set rivet 30. Positioning holes 7B and 8B (B60 and B35) are formed in appropriate positions of the support plate 7 and the LED board 8, respectively, and are adjacent to the through hole 7a and the board hole 8a, respectively. The positioning holes are arranged coaxially by the support plate 7 and the LED substrate 8.

As shown in fig. 62, the reflecting sheet 11 is provided with a keyhole-shaped insertion hole 11c (B57) having a circular portion extending outward, and the through hole 7a and the substrate hole 8a are located in the circular portion of the insertion hole 11 c. The positioning holes 7b, 8b are located at the portions where the insertion holes 11c protrude. The width dimension of the portion of the insertion hole 11c protruding is slightly larger than the positioning holes 7b, 8 b. Positioning rivets 30 are inserted into the through holes 7a, the substrate holes 8a, and the positioning holes 7B and 8B (B7 and B73).

Set rivet 30 includes female rivet 22(B71), and male rivet 31 (B72). The receiving rivet 22 of the set rivet 30 has the same structure as the receiving rivet of the rivet 21, and the same reference numerals are assigned thereto, and detailed description thereof is omitted.

The insert rivet 31 includes a head 31a (B72a) having a larger diameter than the insert hole 11c, and the head 31a has an oval shape. A cylindrical leg portion 31b that is at right angles to the head portion 31a is provided at one end portion of the head portion 31 a. A tapered portion 31ba is formed at the tip of the leg portion 31b, and the diameter of the leg portion 31b is gradually reduced toward the tip. The diameter of the leg 31b near the head 31a is substantially the same as the inner diameter of the locking portion 22a, and is larger than the dimension between the abutting portions 22c when the leg 31b is not inserted. At the other end of the head portion 31a, a cylindrical positioning portion 31c (B73) at right angles to the head portion 31a is provided. The diameter of the positioning portion 31c is slightly smaller than the diameter of the positioning holes 7b and 8 b. The dimensions of positioning portion 31c and leg portion 31b are substantially the same as the dimensions of through hole 7a and substrate hole 8a and positioning holes 7b and 8 b. Further, the edge portion of the head portion 31a protrudes toward the leg portion 31b, and the protruding width of the edge portion of the head portion 31a is smaller than the axial dimension of the locking portion 22a, that is, the thickness dimension of the locking portion 22 a.

In the case where the positioning portion 31c is inserted into the positioning holes 7b and 8b and the reflection sheet is moved in the width direction of the protruding portion of the insertion hole 11c, the positioning portion 31c abuts against the edge of the protruding portion of the insertion hole 11c, and therefore, the reflection sheet can be positioned.

The leg 31b of the insertion rivet 31 is inserted into the locking portion 22a, and the tip of the leg 31b is inserted into the gap between the abutting portions 22 c. A tapered portion 31ba is formed at the tip of the leg portion 31b, and the gap is opened by inserting the leg portion 31 b. The elastic portion 22b is bent outward and abuts against the edge portion of the through hole 7 a.

The head 31a is in contact with the locking portion 22a, the head 31a is not in contact with the reflection sheet 11, and a slight gap is provided between the head 31a and the reflection sheet 11, so that when the reflection sheet 11 thermally expands due to light emitted from the LED9, the reflection sheet 11 is allowed to expand and contract due to the thermal expansion, thereby preventing the reflection sheet 11 from being wrinkled. The reflective sheet 11 is held by the edge portion of the head portion 31 a. The support plate 7 and the LED board 8 are held between the elastic portions 22b and the engaging portions 22a with an appropriate pressure, and the LED board 8 is brought into close contact with the support plate 7.

Next, the support rivet 40 will be explained. Fig. 65 is a sectional view taken along line III-III of fig. 62 schematically showing the support rivet 40.

The holding rivet 40(B8) includes the receiving rivet 22(B81) and the inserting rivet 41 (B82). The receiving rivet 22 of the supporting rivet 40 has the same structure as the receiving rivet of the rivet 21 or the set rivet, and the same reference numerals are assigned thereto, and detailed description thereof is omitted. As shown in fig. 62, the reflection sheet 11 has an insertion hole 11d (B55) formed at a position corresponding to the substrate hole 8a (B65), and the insertion hole 11d has a diameter larger than that of the substrate hole 8a (B65).

The insertion rivet 41 has a head 41a (B82a) having a larger diameter than the insertion hole 11d, and a cylindrical leg 41B perpendicular to the head 41a is provided at the center of the head 41 a. A tapered portion 41ba is formed at the tip of the leg portion 41b, and the diameter of the leg portion 41b is gradually reduced toward the tip. The diameter of the leg 41b near the head 41a is substantially the same as the inner diameter of the locking portion 22a, and is larger than the dimension between the contact portions 22c when the leg 41b is not inserted. Further, the edge portion of the head portion 41a protrudes toward the leg portion 41b, and the protruding width of the edge portion of the head portion 41a is smaller than the axial dimension of the locking portion 22a, that is, the thickness dimension of the locking portion 22 a.

The support portion 41c (B83) having a conical shape with a curved surface at the tip thereof axially extends from the center of the head 41a on the opposite side of the locking portion 22 a. The support portion 41c supports the diffuser plate 6.

The leg 41b of the insertion rivet 41 is inserted into the locking portion 22a, and the tip of the leg 41b is inserted into the gap between the abutting portions 22 c. A tapered portion 41ba is formed at the tip of the leg portion 41b, and the gap is gradually widened by inserting the leg portion 41 b. The elastic portion 22b is bent outward and abuts against the edge portion of the through hole 7 a.

The head 41a abuts against the engaging portion 22a, the head 41a does not contact the reflection sheet 11, a slight gap is provided between the head 41a and the reflection sheet 11, and when the reflection sheet 11 thermally expands due to light emitted from the LED9, the reflection sheet 11 is allowed to expand and contract due to the thermal expansion, so that wrinkles of the reflection sheet 11 are prevented from occurring. The reflective sheet 11 is held by the edge portion of the head portion 41 a. The support plate 7 and the LED board 8 are held between the elastic portions 22b and the engaging portions 22a with an appropriate pressure, and the LED board 8 is brought into close contact with the support plate 7.

In the display device according to embodiment 3-1, since the reflection sheet 11 is disposed between the head portions of the rivets 20, the set rivets 30, and the support rivets 40 and the one surface of the LED substrate 8, and a gap is provided between the head portions and the reflection sheet 11, the reflection sheet 11 can expand and contract between the head portions and the reflection sheet 11 when a rapid thermal change occurs, and wrinkles in the reflection sheet 11 can be prevented.

Further, by bringing the head portions of the rivets 20, the set rivets 30, and the support rivets 40 into contact with the locking portions 22a, the reflection sheet 11 can be held with a slight gap provided between the edge portion of the head portion and the reflection sheet 11, and wrinkles in the reflection sheet 11 can be prevented. In a state where the locking portion 22a is locked to the edge portion of the substrate hole 8a, the elastic portion 22b is inserted into the substrate hole 8a and the through hole 7a, and the rivet 20, the set rivet 30, or the leg portion of the support rivet 40 is inserted into the locking portion 22a and is brought into contact with the contact portion 22 c. At this time, since the elastic portion 22b is bent outward in the radial direction by elastic deformation, the bent elastic portion 22b comes into contact with the edge portion of the through hole 7a, and therefore, the LED substrate 8 and the supporting plate 7 can be held by the locking portion 22a and the elastic portion 22 b.

Further, when the positioning portion 31c is inserted into the positioning holes 7b and 8b, the reflection sheet 11 comes into contact with the positioning portion 31c when the reflection sheet 11 rotates, and the rotation of the reflection sheet 11 can be prevented. Therefore, the reflection sheet 11 can be reliably positioned.

Further, since the support rivets 40 hold the reflection sheet 11 and the support portion 41c supports the diffusion plate 6, the diffusion plate 6 can be prevented from being bent and the number of parts can be reduced.

In the display device according to embodiment 3-1, the positioning holes 7b and 8b are formed in the support plate 7 and the LED substrate 8, respectively, but the positioning holes 8b may be formed only in the LED substrate 8. It goes without saying that, in this case, the axial dimension of the positioning portion 31c corresponds to the axial dimension of the positioning hole 8 b. The display device according to the embodiment uses the LED9 as a light-emitting element, but an LD (Laser Diode) or the like may be used. Further, the head portions 31a and 41a of the insertion rivets 21 and 31 may be provided with a support portion 41 c.

Embodiment mode 3-2

Fig. 66A and 66B are enlarged cross-sectional views showing other structures of the portion where the LED substrate 8 is fixed to the support plate 7. Fig. 66A has a structure in which the LED substrate 8(B3) is fixed to the support plate 7(B6) by a single rivet 50(B7) instead of the rivet 20(B7) having the receiving rivet 22(B71) and the inserting rivet 21(B72), and fig. 66B has a structure in which the LED substrate 8 is fixed to the support plate 7 by a male screw 60(B7) instead of the rivet.

The rivet 50(B7) of fig. 66A includes a head portion 50a (B72a), a step portion 50B, and a plurality of leg portions 50c, the head portion 50a having a larger diameter than the insertion hole 11B, the step portion 50B being continuous with a central portion of the head portion 50a and having a larger diameter than the substrate holes 8a (B33a, B34a), the leg portions 50c being continuous with a central portion of the step portion 50B and being inserted into the through holes 7a (B64), and a tip end of the leg portion 50c being provided with a claw portion 50d which is caught by a hole edge portion of the through hole 7 a.

In this configuration, leg portion 50c is inserted into substrate hole 8a and through hole 7a from insertion hole 11b, claw portion 50d is clamped to the hole edge portion of through hole 7a, and step portion 50b is brought into contact with the hole edge portion of substrate hole 8a, whereby LED substrate 8 is fixed to support plate 7. A slight gap is provided between the edge portion of the head portion 50a and the reflective sheet 11, and when the reflective sheet 11 thermally expands due to the light emitted from the LED9, the reflective sheet 11 is allowed to expand and contract due to the thermal expansion, so that the reflective sheet 11 is not wrinkled.

The male screw 60(B7) of fig. 66B includes a head portion 60a (B72a), a step portion 60B, a step portion 60c, and a screw shaft portion 60d, the head portion 60a having a larger diameter than the insertion hole 11B, the step portion 60B being continuous with a central portion of the head portion 60a and having a larger diameter than the substrate hole 8a (B33a, B34a), the step portion 60c being continuous with a central portion of the step portion 60B and having a larger diameter than the through hole 7a (B64), and the screw shaft portion 60d being continuous with a central portion of the step portion 60c and being screwed into the through hole 7 a.

In this configuration, the male screw 60 is fixed to the support plate 7 by inserting the screw shaft portion 60d side of the male screw 60 into the substrate hole 8a from the insertion hole 11b and screwing the screw shaft portion 60d into the through hole 7a so that the step portion 60c abuts against the hole edge portion of the through hole 7a, and the step portion 60b abuts against the hole edge portion of the substrate hole 8a so that the LED substrate 8 is fixed to the support plate 7. A slight gap is provided between the edge portion of the head portion 60a and the reflective sheet 11, and when the reflective sheet 11 thermally expands due to the light emitted from the LED9, the reflective sheet 11 is allowed to expand and contract due to the thermal expansion, so that the reflective sheet 11 is not wrinkled.

Embodiment 4

Fig. 67 is a sectional view showing a main part of a structure of a light source device according to the present invention, fig. 68 is a plan view of a part of the light source device, fig. 69 is a plan view obtained by disassembling a part of the light source device, fig. 70 is a plan view of a part of a member of the light source device, fig. 71 and 72 are plan views obtained by enlarging a part of the light source device, fig. 73 and 74 are perspective views showing a structure of a light emitting diode substrate on which a lens is mounted, and fig. 75 is a sectional view showing an example of a fixture.

The light source device includes: a plurality of light emitting diode substrates 2(B3), the plurality of light emitting diode substrates 2(B3) being arranged in parallel with each other in a spaced apart manner, and a plurality of light emitting diodes 1(B1) being mounted on one surface 2 a; a plurality of lenses 3(B2), the plurality of lenses 3(B2) being mounted on the one surface 2a of the light emitting diode substrate 2 so as to face the top of each light emitting diode 1, and diffusing light emitted from the light emitting diode 1; a reflection sheet 4(B5), the reflection sheet 4(B5) having a through hole 41(B53) for disposing the lens 3 therein, being placed on the one surface 2a of the light emitting diode substrate 2, and reflecting light emitted from the light emitting diode 1; a plurality of connectors 5(B4), the plurality of connectors 5(B4) connecting the adjacent light emitting diode substrates 2, 2 to each other; and a support 6(B6), the support 6(B6) being positioned on the side of the other surface 2B of the light-emitting diode substrates 2 and supporting the plurality of light-emitting diode substrates 2.

The light emitting diode substrate 2(B3) has a circuit portion on one surface 2a thereof, and has a rectangular shape (rectangular shape) with a large ratio of length to width. A plurality of light emitting diodes 1 are mounted on one surface 2a of each of the light emitting diode substrates 2 so as to be separated from each other at substantially the same interval in the longitudinal direction. The light emitting diode substrate 2 is a single-sided substrate having a conductive portion on only one side 2 a. A plurality of rectangular light emitting diode substrates 2 are arranged side by side so as to be separated from each other in the longitudinal direction and the width direction on one surface 6a of a substantially rectangular support 6, with the longitudinal direction of the substrates being aligned in the same direction.

In fig. 69, the following example is shown: that is, the light emitting diode substrate 2 on which 6 light emitting diodes 1 are mounted is disposed at the center, the light emitting diode substrates 2 on which 5 light emitting diodes 1 are mounted are disposed on both sides thereof, three light emitting diode substrates 2 connected in a row by this are arranged in 8 rows, and the mounting intervals of the light emitting diodes 1 on the light emitting diode substrates 2 are made substantially the same in the width direction. The light emitting diode substrates 2 arranged in a direction orthogonal to the row of the light emitting diode substrates 2 arranged in a row have substantially the same dimension in the longitudinal direction. The light emitting diodes 1 on all the light emitting diode substrates 2 are arranged at substantially the same two-dimensional intervals.

The light-emitting diode substrate 2 has connection portions 21 and 22(B31 and B32) at both ends in the longitudinal direction of the one surface 2 a. Among the three light-emitting diode substrates 2 arranged in a row, the connection portions 21, 21 of the adjacent light-emitting diode substrates 2 are connected to each other by the connector 5 (B4). As will be described later, the connection portion 22 of the light emitting diode substrate 2 positioned at one end of the row is connected to the power supply circuit substrate via a connector (B41), and the connection portion 22 of the light emitting diode substrate 2 positioned at the other end of the row is connected to the short-circuit connector.

The lens 3(B2) includes a light transmitting portion 31(B21) and three positioning protrusions 32(B22), the light transmitting portion 31(B21) is opposed to the top of the light emitting diode 1 separately and has a hemispherical concave portion for diffusing the light emitted by the light emitting diode 1 to the four sides, the positioning protrusions 32(B22) protrude from the surface of the light transmitting portion 31 facing the one surface 2a toward the light emitting diode substrate 2, the lens 3 is positioned with respect to the light emitting diode substrate 2, and the tip ends of the positioning protrusions 32 are attached to the one surface 2a with an adhesive. Light-transmitting portion 31 is formed slightly smaller than through hole 41 of reflection sheet 4.

The reflection sheet 4(B5) is formed of a single synthetic resin sheet having light reflectivity and a substantially rectangular shape corresponding to the support body 6, and has through holes 41(B53) arranged in a grid pattern and having a circular shape with a diameter slightly larger than the light transmission portion 31 opened at portions corresponding to the lenses 3, and has second through holes 42 having a substantially rectangular shape through which the connector 5 can be inserted opened at portions corresponding to the connector 5.

Two insertion holes 2c and 2d (B33 and B34) through which a rivet 8(B7) is inserted are formed in one end and the other end of the rectangular light emitting diode substrate 2 in the longitudinal direction, and the rivet 8(B7) supports the light emitting diode substrate 2 on the support body 6. Each insertion hole 2c, 2d is located between two adjacent lenses 3. One of the two insertion holes 2c, 2d has a smaller dimension in the substrate longitudinal direction than the other insertion hole 2d (B34) of the insertion hole 2c (B33). Specifically, one insertion hole 2c is a circular hole, and the other insertion hole 2d is formed in an oblong shape elongated in the longitudinal direction of the substrate. The light emitting diode substrates 2 are arranged such that the small-sized insertion holes 2c and the large-sized insertion holes 2d are adjacent to each other at the end portions where the light emitting diode substrates 2 arranged in a row are connected.

The eight light emitting diode substrates 2 are adjacent to each other in a direction orthogonal to the row of the light emitting diode substrates 2 arranged in a row, and in the eight light emitting diode substrates 2, the eight insertion holes 2c on one end side are arranged in a staggered manner, and the eight insertion holes 2d on the other end side are arranged in a staggered manner. Specifically, the following structure is adopted: that is, the insertion holes 2c on the one end side are alternately arranged at positions close to one of the two lenses 3 located on the one end side and at positions close to the other lens, and similarly, the insertion holes 2d on the other end side are alternately arranged at positions close to one of the two lenses 3 located on the other end side and at positions close to the other lens, and the rivets 8 that are inserted through the insertion holes 2c and the insertion holes 2d and fix both ends of the light emitting diode substrate 2 to the support body 6 are arranged in a staggered manner, whereby the influence of the decrease in luminance by the rivets 8 can be dispersed, and the luminance unevenness of the illumination light can be suppressed.

The support body 6 is formed by molding a metal plate, and includes a plate portion 61(B61) having a substantially rectangular flat plate shape and a frame portion 62(B62) connected to the periphery of the plate portion 61, and accommodates and supports the light emitting diode substrate 2 in a longitudinal direction and a width direction in parallel on one surface 6a of the plate portion 61. The plate portion 61 of the support body 6 is provided with through holes 61a (B64) corresponding to the positions of the insertion holes 2c and 2d of the light emitting diode substrate 2.

As shown in fig. 75, the rivet 8(B7) includes: a tube member 81(B71) having an outer diameter g1 through which the insertion holes 2c and 2d and the through hole 61a can be inserted, the tube member 81(B71) having a flange portion 81a (B71a) at one end thereof which cannot be inserted through the insertion holes 2c and 2d and the through hole 61a, and an inner diameter g3 at the other end thereof which is smaller than the inner diameter g2 at one end thereof; and a shaft member 82(B72), the shaft member 82(B72) having a shaft portion 82a that can be inserted into one end of the tube member 81 and has a diameter larger than the inner diameter g3 of the other end, and a head portion 82B (B72a) that cannot pass through the insertion holes 2c, 2d and the through hole 61 a. The barrel member 81 and the shaft member 82 are made of a synthetic resin material.

The reflector sheet 4 has a third through hole 43(B54) in the form of an elongated hole continuous with the through hole 41 at a position corresponding to the rivet 8, and the third through hole 43(B54) has a diameter larger than the diameter of the head portion 82B of the shaft member 82 so that the rivet 8 can be inserted therethrough. The third through holes 43 adjacent to each other in the direction orthogonal to the row of the light-emitting diode substrate 2 are arranged in a staggered manner, and the shape of the long hole continuous with one of the through holes 41 on both sides and the shape of the long hole continuous with the other through hole are alternately changed.

As described above, the eight rivets 8 inserted through the respective insertion holes 2c and 2d of the light emitting diode substrate 2 and the third through holes 43 of the reflection sheet 4 are arranged in a staggered manner on the side of one end portion of the eight light emitting diode substrates 2 adjacent in the direction orthogonal to the row of the light emitting diode substrates 2, and the eight rivets 8 on the side of the other end portion are arranged in a staggered manner, whereby the influence of the decrease in luminance by the rivets 8 can be dispersed, and the luminance unevenness of the illumination light can be suppressed.

Next, a step of supporting the three light emitting diode substrates 2 connected in a row on the support body 6 by the rivet 8 will be described. First, after the insertion holes 2c and 2d of the respective light emitting diode substrates 2 and the through holes 61a of the support body 6 are aligned, the tube member 81 is inserted through the insertion hole 2c and the through hole 61a having a small size from the side of the one surface 2a of the respective light emitting diode substrates 2, and the flange portion 81a is brought into contact with the one surface 2a of the light emitting diode substrates 2. Next, when the shaft portion 82a of the shaft member 82 is inserted until the head portion 82b thereof comes into contact with the flange portion 81a of the tube member 81, the distal end portion of the tube member 81 is pushed outward by the shaft portion 82a of the shaft member 82. Since the shaft portion 82a of the shaft member 82 is held by the distal end portion of the tube member 81 that is expanded outward by pressing the shaft portion inward, and the distal end portion of the tube member 81 having an expanded diameter cannot be inserted through the through hole 61a of the support body 6, the respective light emitting diode substrates 2 can be fixed to the support body 6 by the rivet 8.

After the rivet 8 is attached to the small-sized insertion hole 2c as described above, the rivet 8 is attached to the large-sized insertion hole 2d in the same manner, and the respective light emitting diode substrates 2 are fixed to the support body 6 by the rivet 8. At this time, when the adjacent light emitting diode substrates 2 are connected by the connector 5, the positions of the two substrates are displaced from the proper positions in the substrate width direction, and in this case, the through hole 61a of the support body 6 is not positioned at the center of the insertion hole 2d, but the dimension of the insertion hole 2d in the substrate width direction is increased, so that the through hole 61a does not fall out of the range of the insertion hole 2d, and the insertion hole 2d and the through hole 61a can be inserted and attached by the rivet 8.

After the rivets 8 are attached to the insertion holes 2c and 2d of all the light emitting diode substrates 2, the through holes 41 are inserted through the lenses 3, the second through holes 42 are inserted through the connectors 5, and the third through holes 43 are inserted through the rivets 8, and in this state, the reflecting sheet 4 is placed on the light emitting diode substrates 2 so as to face each other.

Fig. 76 is a sectional view showing the structure of a display device including a light source device according to the present invention. The display device includes: a display unit 70(a) having a substantially rectangular parallelepiped shape, the display unit 70(a) having a display surface 72a on the front side thereof; a light source device a (b) disposed at the rear side of the display unit 70; and a housing 71(D) that covers the periphery of the display section 70 and the rear side of the light source device a.

The display unit 70 includes a display panel 72(a1) having a display surface 72a, and an optical sheet 73(C) disposed on the rear side of the display panel 72. The peripheral portion of the display panel 72 is sandwiched forward and backward by the front support frame 74(a2) and the rear support frame 75(A3) to constitute a panel assembly, and the rear support frame 75 is attached to the peripheral portion of the support body 6.

The optical sheet 73 is a laminate in which a thick diffuser plate that diffuses light emitted from the light emitting diode 1 as a light source and a thin synthetic resin sheet including a reflective polarizing plate, a prism sheet, a diffusion sheet, and the like are laminated. The peripheral portion of the optical sheet 73 is sandwiched between the frame portion 62 of the support 6 and the rear holding frame 75.

The housing 71 includes a housing front part 71a (D1) for shielding the front side of the peripheral portion of the display unit 70 and a deep-disk-shaped housing rear part 71b (D2) for shielding the peripheral portion and the rear side of the light source device a, and the housing 71 is attached to the frame 62 of the support body 6 by male screws.

Although not shown, a plurality of circuit boards such as a power circuit board connected to the connecting electrode portion 22 of the light emitting diode board 2 via a second connector, a control circuit board for driving and controlling the display portion, and a signal processing circuit board for processing a video signal displayed on the display surface of the display portion are mounted on the other surface 6b of the plate portion 61.

The specific structure in which the plurality of fasteners (rivets 8) are arranged in a staggered pattern is not limited to embodiment 4 described above. Fig. 77 is a plan view of a part of a light source device according to another embodiment of the present invention. In this other embodiment, the distance L between the rivets 8(B7) arranged in a staggered manner in the longitudinal direction of the light-emitting diode substrate 2 is set smaller than that in the above embodiment, and the third through-hole 43(B54) of the reflection sheet 4 through which the rivet 8 is inserted is a circular hole separated from the through-hole 41 (B53).

In embodiment 4, two insertion holes 2c and 2d through which the rivet 8 is inserted are provided at both ends of the rectangular light-emitting diode substrate 2 in the longitudinal direction, but the following configuration may be adopted: that is, insertion holes are provided in both ends of the light emitting diode substrate 2 in the longitudinal direction and in the inner portions of both ends, and the insertion holes adjacent to each other in the direction orthogonal to the rows of the light emitting diode substrate 2 are arranged in a staggered manner.

In embodiment 4, the plurality of rectangular light emitting diode substrates 2 are arranged in a row in the longitudinal direction and a plurality of rows in the width direction, and the light emitting diode substrates 2 are arranged in a row, but the configuration of the light emitting diode substrates is not limited to embodiment 4. Fig. 78 is a plan view of a light source device according to a second another embodiment of the present invention, partially exploded, and fig. 79 is a plan view of a part of components of the light source device according to the second another embodiment. In another embodiment, the size of the rectangular light emitting diode board 2A (B3) is longer than that of the light emitting diode board 2 of the above-described embodiment, and eight light emitting diode boards 2A are arranged side by side in the board width direction at substantially the same interval as the mounting interval of the light emitting diodes 1 on the light emitting diode board 2A. The connection portions 22(B32) are provided at both ends of each light emitting diode substrate 2A in the longitudinal direction, and the connection portions 21 of the connector 5 are not provided (B31).

Six insertion holes 2e 1-2 e6 through which the rivets 8 are inserted are formed in six positions in the longitudinal direction of each light emitting diode substrate 2A. The insertion hole 2e1 at one end of the light emitting diode substrate 2A in the longitudinal direction is a circular hole similar to the insertion hole 2c of the above embodiment, and the other five insertion holes 2e2 to 2e6 are long holes similar to the insertion hole 2d of the above embodiment. In eight light emitting diode substrates 2A adjacent to each other in the direction of arranging the light emitting diode substrates 2A, the insertion holes 2e 1-2 e6 are arranged in a staggered manner at each of six positions. That is, the eight insertion holes 2e1 at one end of the eight led boards 2A arranged side by side are arranged in a staggered manner, and similarly, the eight insertion holes 2e2, the eight insertion holes 2e3, the eight insertion holes 2e4, the eight insertion holes 2e5, and the eight insertion holes 2e6 at other positions are arranged in a staggered manner. The reflection sheet 4A is provided with third insertion holes 43 corresponding to the positions of the insertion holes 2e 1-2 e6, and is not provided with second insertion holes 42 corresponding to the connectors 5.

In embodiment 4 described above, the fastener is configured by the rivet 8 formed by the two members of the tubular member 81 and the shaft member 82, but the fastener may be formed by a single member, or may be configured by a screw, a bolt, a nut, or the like other than the rivet.

In embodiment 4, the third through-hole 43 having a diameter larger than the diameter of the head portion 82b of the rivet 8 is provided, and the head portion 82b is disposed in the third through-hole 43, whereby the reflection sheet 4 can be allowed to expand and contract due to thermal expansion, but in addition to this, the following configuration may be adopted: that is, the diameter of the head portion 82b is set larger than the diameter of the third through hole 43, and the outer peripheral portion of the head portion 82b is separated from the periphery of the third through hole 43 of the reflection sheet 4 in the thickness direction and faces the periphery, so that the head portion 82b can prevent the reflection sheet 4 from being biased in the direction of separating from the light emitting diode substrate 2.

In embodiment 4 described above, the light source device according to the present invention is applied to illumination of a display panel of a liquid crystal display device, but the light source device can also be applied to illumination of a display panel of a light-emitting display device other than a liquid crystal display device.

Embodiment 5-1

Fig. 80 is a longitudinal sectional view schematically showing the display device.

In the figure, reference numeral 1 denotes a rectangular display panel (a1) having liquid crystal, and the display panel 1 has the following structure: that is, the voltage applied to the liquid crystal is controlled to adjust the transmittance of light, thereby displaying a video. The peripheral portion of the display panel 1 is held between the front holding frame 2(a2) and the rear holding frame 3(A3), and is housed in the front case 4(D1) having a rectangular frame shape. The front housing 4 is disposed around the front holding frame 2 and the rear holding frame 3. The front case 4 has a rectangular opening having a size corresponding to that of the display panel 1. A plurality of optical sheets 5(C) are provided on the rear side of the display panel 1, and the optical sheets 5(C) focus light of a light emitting diode 9 (light emitting element) described later on the display panel 1.

A diffusion plate 6 is provided on the rear side of the optical sheet 5, and the diffusion plate 6 uniformly diffuses the light of the light emitting diodes 9 (B1). The diffusion plate 6 is supported by the edge portion of the deep-disk-shaped support plate 7 (B6). A plurality of substrates 8 are arranged side by side on the front surface of the support plate 7 (B3), and a film-like heat dissipation pattern (not shown) made of a heat conductive material, for example, a metal is formed on the rear surface of the substrate 8.

A plurality of light emitting diodes 9, … …, 9 are mounted on the front surface of the substrate 8. The light emitting diode 9 includes a flat plate portion 9a which is in close contact with the front surface of the substrate 8, and a spindle portion 9b which projects forward from the flat plate portion. Lenses 10, … …, and 10(a2) for diffusing light are disposed on the front sides of the light emitting diodes 9, … …, and 9, respectively. The lens 10 is formed in a thick curved shape protruding forward, and a concave portion 10a corresponding to the shape of the spindle portion 9b is formed in the central portion of the rear surface of the lens 10. The spindle portion 9b is accommodated inside the recess 10 a. Three protrusions 10B, and 10B (B22) protruding toward the substrate 8 are provided in parallel in the circumferential direction on the peripheral portion of the lens 10, and the tip of the protrusion 10B is attached to the front surface of the substrate 8 with an adhesive.

Support bases (not shown) for supporting the deep-dish-shaped reflection sheet 11(B5) are provided on the left and right sides of the support plate 7, respectively. A plurality of sheet holes 11a (B53) into which the lenses 10 are inserted are opened in the bottom surface of the reflection sheet 11. Each lens 10 protrudes to the front side through the sheet hole 11 a.

The rear side of the support plate 7 is provided with a deep-disc-shaped rear housing 12 (D2). The longitudinal and transverse dimensions of the rear housing 12 are substantially the same as those of the front housing 4(1), and the edge portions of the rear housing 12 and the front housing 4 are opposed to each other. At the edge portions of the front case 4 and the rear case 12, engaging convex portions and engaging concave portions, not shown, are provided, respectively, and the engaging concave portions and the engaging convex portions are engaged with each other to fix the front case 4 to the rear case 12. Between the support plate 7 and the rear case 12, a plurality of circuit boards such as a power supply circuit board connected to the connection electrode portion of the substrate 8 via a connector, a control circuit board for driving and controlling the display panel 1, and a signal processing circuit board for processing video signals displayed on the display surface of the display panel 1 are arranged.

Fig. 81 is a front view schematically showing the light emitting diode 9 provided with the reflection sheet 11 and the substrate 8, fig. 82 is a graph showing the amount of light emitted according to the light emission angle of the light emitted from the light emitting diode 9, and fig. 83 is a cross-sectional view taken along line IV-IV of fig. 81 schematically showing a rivet.

The substrate 8 is provided with a plurality of first through holes 8a, … …, 8a (B33, B34) arranged in parallel in the longitudinal direction of the substrate 8. The support plate 7 has a plurality of second through holes 7a, … …, 7a (B64) formed at positions corresponding to the first through holes 8a, … …, 8 a. The diameter of the second through-hole 7a is substantially the same as the diameter of the first through-hole 8 a. In the reflection sheet 11, a hole 11B (B54) is opened at a position corresponding to the first through hole 8a, and the hole 11B has a diameter larger than that of the first through hole 8 a. As shown in fig. 81, an elliptical insertion hole 11c that is continuous with the sheet hole 11a and extends in the longitudinal direction of the substrate 8 is formed at an appropriate position of the reflection sheet 11. The insertion hole 11c has a minor axis diameter and a major axis diameter larger than the diameter of the head of a rivet 20 described later.

As shown in fig. 81, a rivet 20 is provided in the hole 11b between the lenses 10. Rivets 20 made of, for example, a metal or carbon material are inserted into the first through holes 8a and the second through holes 7a corresponding to the holes 11B (B7), and the base plate 8 is fixed to the support plate 7 by the rivets 20. Rivet 20 includes female rivet 22(B71) and male rivet 21 (B72).

The receiving rivet 22 has an annular locking portion 22a (B71a) having a diameter larger than that of the first through-hole 8a, and an outer peripheral portion of the locking portion 22a is located outside the first through-hole 8a and inside the hole 11B and is locked to an edge portion of the first through-hole 8 a. A plurality of elastic portions 22b are provided in parallel in the circumferential direction on the inner peripheral portion of the locking portion 22 a. The elastic portion 22b protrudes in the axial direction of the locking portion 22a, and is inserted through the first through hole 8a and the second through hole 7 a. The axial dimension of the elastic portion 22b is larger than the axial dimensions of the first through hole 8a and the second through hole 7a, and the projecting end portion of the elastic portion 22b projects from the second through hole 7a in the axial direction.

An abutting portion 22c that protrudes radially inward of the locking portion 22a is provided integrally with the elastic portion 22b at the protruding end portion of the elastic portion 22b, and a gap is provided between the abutting portions 22c, 22 c.

The inner side of the contact portion 22c contacts a leg portion 21b described later, and the contact of the leg portion 21b causes the elastic portion 22b to bend outward, so that the elastic portion 22b contacts the edge portion of the second through hole 7 a. Therefore, the substrate 8 and the support plate 7 are sandwiched between the locking portion 22a and the elastic portion 22b in the front-rear direction.

The insertion rivet 21 has a head 21a (B72a) having a larger diameter than the hole 11B, and a cylindrical leg 21B perpendicular to the head 21a is provided at the center of the head 21 a. A tapered portion 21ba is formed at the tip of the leg portion 21b, and the diameter of the leg portion 21b is gradually reduced toward the tip. The diameter of the leg portion 21b near the head portion 21a is substantially the same as the inner diameter of the locking portion 22a, and is larger than the dimension between the abutting portions 22c when the leg portion 21b is not inserted. The edge portion of the head portion 21a extends toward the leg portion 21b, and the extension width of the edge portion of the head portion 21a is smaller than the axial dimension of the locking portion 22a, that is, the thickness dimension of the locking portion 22 a.

The leg portion 21b of the insertion rivet 21 is inserted into the locking portion 22a, and the tip end portion of the leg portion 21b is inserted into the gap between the abutting portions 22 c. A tapered portion 21ba is formed at the tip of the leg portion 21b, and the gap is widened by inserting the leg portion 21 b. The elastic portion 22b is bent outward and abuts against the edge portion of the second through hole 7 a.

The head portion 21a contacts the locking portion 22a, and the head portion 21a does not contact the reflection sheet 11. A slight gap is provided between the edge portion of the head portion 21a protruding toward the leg portion 21b and the reflection sheet 11, and when the reflection sheet 11 thermally expands due to the light emitted from the light emitting diode 9, the reflection sheet 11 is allowed to expand and contract due to the thermal expansion, thereby preventing the reflection sheet 11 from being wrinkled. The reflective sheet 11 is held by the edge portion of the head portion 21 a. The support plate 7 and the substrate 8 are held by the elastic portion 22b and the locking portion 22a with an appropriate pressure, and the substrate 8 is brought into close contact with the support plate 7.

The thickness dimension of the head portion 21a and the locking portion 22a is shorter than the front-rear dimension of the light emitting diode 9, and the top portion of the head portion 21a is located on the rear side of the top portion of the spindle portion 9b of the light emitting diode 9.

As shown in fig. 81, a rivet 20 is provided in the insertion hole 11c between the lenses 10. Since both the minor axis diameter and the major axis diameter of the insertion hole 11c having an elliptical shape are larger than the diameter of the head (head 21a) of the rivet 20, the head 21a is located inside the insertion hole 11 c. As shown in fig. 83, similarly to the rivet 20 provided in the hole 11b, the support plate 7 and the base plate 8 are held by the elastic portion 22b and the locking portion 22a with an appropriate pressure so that the base plate 8 is closely attached to the support plate 7. The thickness of the head 21a and the locking portion 22a is shorter than the front-rear dimension of the light emitting diode 9, and the top of the head 21a is located behind the top of the spindle 9b of the light emitting diode 9.

In the display device according to embodiment 5-1, the size from the substrate 8 to the top of the head portion 21a is made shorter than the size from the substrate 8 to the top of the lens 10 in accordance with the diffusion range of the light diffused by the lens 10 so as to avoid the light diffused from being blocked by the head portion 21 a. Fig. 82 shows the amount of light emitted from the light emitting diode 9 according to the emission angle of the light. The measurement position of the amount of luminescence is a position 20mm apart from the light emitting diode 9. As is clear from fig. 82, no light is emitted at a light emission angle of 70 degrees or more with respect to zero degrees (the vertex of the light emitting diode 9) of the light emission angle. Therefore, the dimension from the substrate 8 to the top of the head 21a of the insertion rivet 21 disposed apart from the lens 10 attached to the front surface of the substrate 8 in the direction of the front surface of the substrate 8 is made shorter than the dimension from the substrate 8 to the top of the lens 10, so that light diffused by the lens 10 can be prevented from being blocked by the head 21a, and the display panel 1 can be prevented from being degraded in display quality due to uneven brightness.

In consideration of the fact that the light emitted from the light emitting diode 9 is diffused in a wide angle when passing through the lens 10, the dimension from the substrate 8 to the top of the head portion 21a is made shorter than the dimension from the substrate 8 to the top of the light emitting diode 9, so that the light emitted from the light emitting diode 9 can be reliably prevented from being blocked by the head portion 21a, and the occurrence of luminance unevenness in the display panel 1 can be reliably prevented.

Further, by fixing the substrate 8 to the support plate 7 by the rivet 20 and holding the reflection sheet 11 by the head 21a, the reflection sheet 11 can be prevented from being peeled off from the support plate 7, and the number of parts used for the display device can be reduced, thereby shortening the manufacturing time of the display device. In addition, the manufacturing cost of the display device can be reduced. Further, since the gap is provided between the head portion 21a and the reflection sheet 11, even if the reflection sheet 11 expands and contracts due to rapid thermal change, the reflection sheet 11 does not wrinkle.

Further, since the substrate 8 is fixed to the support plate 7 by the rivets 20, the substrate 8 can be fixed to the support plate 7 quickly and reliably, and therefore, the manufacturing time of the display device can be shortened, and the manufacturing cost of the display device can be reduced.

Further, by using the light emitting diode 9 as a light emitting element, the amount of heat generation can be suppressed, and flicker control can be easily performed.

Further, the rivet is not limited to being formed by the insertion rivet 21 and the receiving rivet 22, and the following structure may be adopted: that is, instead of using the receiving rivet 22, the head portion 21a is provided with a plurality of leg portions 21b along the circumference, and the tip portions of the plurality of leg portions 21b are respectively provided with a clamping portion protruding outward, and the support plate 7 and the base plate 8 are sandwiched between the clamping portion and the head portion 21 a. In the display device according to the embodiment, the head portion 21a is located on the rear side of the spindle portion 9b, but the top portion of the head portion 21a may be located between the top portion of the lens 10 and the top portion of the spindle portion 9 b. The display device according to the embodiment uses the light emitting Diode 9 as a light emitting element, but an LD (Laser Diode) or the like may be used.

(modification example)

Next, a modification of the display device according to embodiment 5-1 will be described in detail based on the drawings shown. Fig. 84 is a sectional view schematically showing a rivet 20 according to a modification.

As shown in fig. 84, in the modification, the lens 10 is not provided on the front side of the light emitting diode 9(B1), and light is directly irradiated from the light emitting diode 9 to the diffusion plate 6. The light emitted from the light emitting diodes 9 is irradiated in a wide angle, and the light emitted from the light emitting diodes 9 is sufficiently diffused by the diffusion plate 6 and irradiated to the display panel 1. In the modified example, the thickness dimension of the head portion 21a and the locking portion 22a is also shorter than the front-rear dimension of the light emitting diode 9, and the top portion of the head portion 21a is also located on the rear side of the top portion of the spindle portion 9b of the light emitting diode 9.

Therefore, by setting the dimension from the substrate 8 to the top of the head portion 21a to be shorter than the dimension from the substrate 8 to the top of the light emitting diode 9 in accordance with the irradiation range of the light emitted from the light emitting diode 9, it is possible to reliably avoid the light emitted from the light emitting diode 9 being blocked by the head portion 21a, and to reliably prevent the display panel 1 from generating luminance unevenness.

Embodiment mode 5-2

Fig. 85 is a sectional view schematically showing a screw of the display device.

In this display device, the base plate 8 is fixed to the support plate 7 with screws 30 instead of the rivets 20 (B7). The support plate 7 has a plurality of second through holes 7B, … …, and 7B formed at positions corresponding to the first through holes 8a, … …, and 8a (B64). A female screw is formed inside the second through hole 7b, and the diameter of the second through hole 7b is substantially equal to the diameter of the first through hole 8 a. The screw 30 is inserted into the first through hole 8a and screwed into the second through hole 7 b.

The screw 30 includes a disk-shaped head portion 30a having a large diameter and a columnar shaft portion (leg portion) 30b projecting from a main portion of the head portion 30 a. The diameter of the head 30a is slightly larger than the diameter of the hole 11 b. The shaft portion 30b has an external thread thereon, which is inserted into the washer 31. The washer 31 has an inner diameter slightly larger than that of the shaft portion 30b and is substantially the same as that of the first through hole 8 a. In a state where the shaft portion 30b is inserted into the washer 31, the shaft portion 30b is inserted into the first through hole 8a from the substrate 8 side and screwed into the second through hole 7 b. Therefore, the washer 31 is located between the peripheral portion of the head portion 30a and the edge portion of the first through-hole 8 a.

The axial dimension of the gasket 31, that is, the thickness dimension of the gasket 31 is slightly longer than the thickness of the reflector plate 11, and as shown in fig. 85, a slight gap is provided between the head portion 30a and the reflector plate 11. The thickness of the washer 31 and the head 30a is shorter than the front-rear dimension of the light emitting diode 9, and the top of the head 30a is located behind the top of the spindle 9b of the light emitting diode 9.

In the hole 11b, since the diameter of the head portion 30a is slightly larger than the diameter of the hole 11b, the peripheral portion of the head portion 30a and the edge portion of the hole 11b face each other with a slight interval therebetween, and the reflector 11 is held by the peripheral portion of the head portion 30 a. The base plate 8 is held between the washer 31 and the support plate 7 by screwing the screw 30, and is closely adhered and fixed to the support plate 7.

In the display device according to embodiment 5-2, the size from the substrate 8 to the top of the head 30a is made shorter than the size from the substrate 8 to the top of the lens 10 in order to avoid the head 30a from blocking the diffused light, depending on the diffusion range of the light diffused by the lens 10. Therefore, the display quality can be prevented from being degraded due to the occurrence of luminance unevenness in the display panel 1.

Further, by setting the dimension from the substrate 8 to the top of the head portion 30a to be shorter than the dimension from the substrate 8 to the top of the light emitting diode 9 in accordance with the irradiation range of the light emitted from the light emitting diode 9, it is possible to reliably avoid the light emitted from the light emitting diode 9 being blocked by the head portion 30a, and to reliably prevent the display panel 1 from generating luminance unevenness.

Further, since the base plate 8 is firmly fixed to the support plate 7 by the screws 30, the base plate 8 can be reliably prevented from being detached from the support plate 7.

Further, the lens 10 may be removed so that the irradiation range of the light emitted from the light emitting diode 9 is wide. In this case, by making the dimension from the substrate 8 to the top of the head portion 30a shorter than the dimension from the substrate 8 to the top of the light emitting diode 9 depending on the irradiation range of the light emitted from the light emitting diode 9, it is possible to reliably avoid the light emitted from the light emitting diode 9 being blocked by the head portion 30a, and to reliably prevent the display panel 1 from generating luminance unevenness.

The same components as those of the display device according to embodiment 5-1 are denoted by the same reference numerals within the structure of the display device according to embodiment 5-2, and detailed description thereof is omitted.

Embodiment 6-1

FIG. 86 is an enlarged cross-sectional view of a part of the structure of a display device according to the present invention, FIG. 87 is a cross-sectional view showing a part of the structure of the light source section in an enlarged manner, FIG. 88 is a front view showing a structure in which a peripheral portion of the light source section is omitted, FIG. 89 is a front view showing a configuration in which a peripheral portion of a light source portion and a light reflecting sheet are omitted, FIG. 90 is a front view showing a configuration of a light reflecting sheet with a peripheral portion omitted, FIG. 91A is a vertical sectional side view showing a configuration of a first shaft portion, FIG. 91B is a cross-sectional plan view showing the structure of the first shaft body portion, FIG. 92A is a longitudinal sectional side view showing the structure of the second shaft body portion, fig. 92B is a cross-sectional plan view showing the structure of the second shaft body portion, and fig. 93 is a cross-sectional plan view showing the structure of the third shaft body portion.

The display device shown in the figure is a liquid crystal television set including a display portion a, a light source portion (light source device) B, and a housing c (d), in other words, a liquid crystal display device, the display portion a is substantially rectangular parallelepiped, and has a display surface for displaying a television image on a front side (one side), the light source portion (light source device) B is substantially rectangular parallelepiped and is disposed on a rear side (the other side) of the display portion a, and the housing c (d) shields a peripheral portion of the display portion a and a rear side of the light source portion B.

The display unit a includes a display panel 1(a1) having a display surface, and an optical sheet 2(C) disposed on the rear side of the display panel 1. The peripheral portion of the display panel 1 is sandwiched forward and backward by the front holding frame 11(a2) and the rear holding frame 12(A3) to constitute a panel assembly.

The optical sheet 2 is a laminate in which a thick diffuser plate that diffuses light emitted from the light emitting diode 3 (B1) as a light source and a thin synthetic resin sheet including a reflective polarizing plate, a prism sheet, a diffusion sheet, and the like are laminated.

The light source unit B includes: a plurality of light emitting diodes 3, the plurality of light emitting diodes 3 being arranged side by side in a lattice shape as a light source; a plurality of light-emitting diode substrates 4(B3), the plurality of light-emitting diode substrates 4(B3) being arranged in a plurality of rows, the light-emitting diodes 3 being mounted on one surface 4a thereof; a plurality of connectors 5(B4), the plurality of connectors 5(B4) connecting the adjacent light emitting diode substrates 4, 4 to each other; a plurality of lenses 6(B2), the plurality of lenses 6(B2) being mounted on the one surface 4a of the light emitting diode substrate 4 so as to face the top of the light emitting diodes 3, and diffusing the light emitted from the light emitting diodes 3; a light reflection sheet 7(B5) having a hole 73(B53) for disposing the lens 6 therein, the light reflection sheet 7(B5) facing the one surface 4a and the one surface of the connector 5 and reflecting the light diffused by the lens 6; a support 8(B6) for supporting the plurality of rows of light emitting diode substrates 4 in parallel, the support 8(B6) being provided; a first shaft 9 and a second shaft 10, the first shaft 9 and the second shaft 10 setting a position of the light reflecting sheet 7 with respect to the support 8; and a third shaft 20 for attaching both ends of the light emitting diode substrate 4 to the support body 8, the third shaft 20 suppressing the light reflecting sheet 7 from being biased in the thickness direction. The second shaft body 10 and the third shaft body 20 are common parts.

The light emitting diode substrate 4 has a rectangular shape having a circuit portion on one surface 4a and insertion holes 4B and 4B (B33 and B34) at both ends, the light emitting diode substrates 4 are arranged in a plurality of rows spaced apart in the longitudinal direction and the width direction on one surface 8a of a substantially rectangular support 8, both ends of each light emitting diode substrate 4 are fixed to the support 8 by a third shaft 20(B7), and the insertion holes 4B and 4B are inserted through the third shaft 20(B7) so as to be movable with respect to the insertion holes 4B and 4B. As shown in fig. 89, a plurality of light emitting diodes 3 are mounted on one surface 4a of each of the light emitting diode substrates 4 so as to be separated in the longitudinal direction, and connection portions 41, 41 are provided at both longitudinal end portions of the one surface 4 a.

In the light emitting diode substrates 4 in which the light emitting diode substrates 4 are arranged in a plurality of rows with one end in the longitudinal direction facing each other, the two adjacent connection portions 41 and 41 of the light emitting diode substrates 4 in each row are connected to each other by the connector 5, the connection portion of the light emitting diode substrate 4 on one side in the row direction is connected to a power supply circuit substrate described later by the second connector (B41), and the connection portion 22 of the light emitting diode substrate 4 on the other side in the row direction is connected to the short-circuit connector.

The support 8 is formed by molding a metal plate, has a substantially rectangular flat plate-like plate portion 81(B61), a frame portion 82(B62) connected to the periphery of the plate portion 81, and four eaves portions 83(B63) connected to the outer edges of the frame portion 82, and has a case shape. A first position setting hole 84 is opened in the central portion of the plate portion 81, a second position setting hole 85 is opened in the peripheral side separated from the first position setting hole 84 in the direction along the sheet surface, a plurality of fitting holes 86 are opened in the plate portion 81 at positions corresponding to the insertion holes 4b so as to be separated in the circumferential direction, and the light emitting diode substrates 4 are accommodated and supported in parallel in the longitudinal direction and the width direction on the one surface 8a of the plate portion 81. In addition, a plurality of attachment holes for attaching the peripheral portion of the display portion a are opened in the brim portion 83 at intervals in the circumferential direction.

A power supply circuit board connected to the light emitting diode board 4 via a second connector (B41) is mounted on one longitudinal side of the other surface of the plate portion 81, and a control circuit board for driving and controlling the display portion a is mounted on the other longitudinal side. A signal processing circuit board that processes a video signal displayed on the display surface of the display unit a is mounted in the longitudinal center portion of the other surface of the plate portion 81.

The light reflecting sheet 7 is formed of one synthetic resin sheet having light reflectivity and substantially rectangular in shape corresponding to the display panel 1 and the support 8, and is formed in a housing shape including a flat portion 71(B51) slightly smaller than the plate portion 81, and a corner frame portion 72(B52) connected to four sides of the flat portion 71 at a folding line and inclined upward outward relative to the flat portion 71.

A through hole 74 for preventing the light reflecting sheet 7 from being displaced in the direction along the sheet surface with respect to the plate portion 81 is opened in the center portion of the flat portion 71, and a long hole 75 for preventing the light reflecting sheet 7 from being displaced in the circumferential direction with respect to the plate portion 81 is opened at a position separated from the through hole 74 toward the peripheral side (B57). The through hole 74 is a circular hole and is formed at a position corresponding to the first position setting hole 84. The long hole 75 is long in the direction away from the through hole 74, and narrow in the direction perpendicular to the direction of separation, and opens at a position corresponding to the second position setting hole 85. The width of the long hole 75 is substantially equal to the diameter of the through hole 74. Further, a plurality of second holes 76 are opened in the flat portion 71 at positions corresponding to the fitting holes 86, one of the second holes 76 is a long hole 75, and the long hole 75 is continuous with the hole 73.

A hole 73(B53) having a slightly larger diameter than the lens 6 is opened in the flat portion 71 at a position corresponding to the lens 6, and a bias portion biased in the thickness direction by contact with the connector 5 is provided at a position corresponding to the connector 5 in the flat portion 71 by notches (B56, B59).

The first shaft 9(B7) has a flexible tube 91(B71) and a pin 92(B72) fitted into the flexible tube 91. The flexible tube 91 has a brim 91a (B71a) at one end thereof, a setting shaft 91B connected to the brim 91a at the other end thereof, a plurality of notches 91c (B71B) extending in the axial direction, and a bulge portion bulging inward, and the member pieces between the notches 91c can be bent in the radial direction to fit the flexible tube 91 into the through hole 74 and the first position setting hole 84. The shaft portion 91b has a slightly smaller diameter than the through hole 74, and has the following structure: that is, the setting shaft 91b is fitted into the through hole 74, so that the light reflecting sheet 7 can be prevented from being displaced in the direction along the sheet surface.

The pin 92 adopts the following structure: that is, one end of the pin 92 has a brim 92a (B72a) having a larger diameter than the brim 91a of the flexible tube 91, and the pin 92 is fitted into the flexible tube 91 so as to be brought into contact with a raised portion inside the flexible tube 91, and the member piece between the slits 91c is bent radially outward of the first position setting hole 84, so that the member piece between the slits 91c is prevented from being elastically restored, and the pin 92 is prevented from coming off the plate portion 81, whereby the position setting state of the light reflection sheet 7 can be maintained by the setting shaft portion 91B.

The second shaft 10 has a flexible cylinder 10a and a pin 10b fitted into the flexible cylinder 10 a. The flexible tube 10a has a brim 10c at one end, a plurality of notches 10d extending in the axial direction and a ridge portion protruding inward at the other end side, and the component pieces between the notches 10d can be bent in the radial direction to fit the flexible tube 10a into the elongated hole 75 and the second position setting hole 85. The brim 10c as the position setting portion has a diameter slightly smaller than the width of the long hole 75, and has the following configuration: that is, the eaves 10c are fitted into the long holes 75, so that the light reflecting sheet 7 can be prevented from being displaced in the circumferential direction around the first shaft 9.

The pin 10b adopts the following structure: that is, one end of the pin 10b has a brim 10e having a diameter larger than that of the brim 10c of the flexible tube 10a, and the pin 10b is fitted into the flexible tube 10a so as to be brought into contact with a ridge inside the flexible tube 10a, and the member pieces between the slits 10d are bent radially outward of the second position setting hole 85, thereby preventing the member pieces between the slits 10d from being elastically restored and preventing the pin 10b from coming off the plate 81.

The third shaft body 20 includes a flexible cylinder 20a and a pin 20b fitted into the flexible cylinder 20 a. The flexible tube 20a has a brim 20c at one end, a plurality of notches 20d extending in the axial direction and a ridge portion protruding inward at the other end side, and the component pieces between the notches 20d can be bent in the radial direction to fit the flexible tube 20a into the fitting hole 86. The pin 20b adopts the following structure: that is, one end of the pin 20b has a flange 20e having a diameter larger than the flange 20c of the flexible tube 20a and the second hole 76, and the pin 20b is fitted into the flexible tube 20a so as to be in contact with the raised portion inside the flexible tube 20a, and the component pieces between the slits 20d are bent radially outward of the fitting hole 86, thereby preventing the component pieces between the slits 20d from being elastically restored and preventing the pin 20b from coming off the plate 81. Further, there is a slight gap between the inner surface of the brim 20e and the sheet surface of the light reflecting sheet 7, so that expansion and contraction of the light reflecting sheet 7 in the sheet surface direction due to thermal expansion can be absorbed, and the structure is as follows: that is, the eaves 20e suppress the deviation of the reflective sheet 7 in the thickness direction with respect to the light emitting diode substrate 4.

The housing C has a housing front part 21(D1) for shielding the front side of the peripheral portion of the display section a and a deep-disk-shaped housing rear part 22(D2) for shielding the peripheral portion and the rear side of the light source section B, and is attached to the frame 82 of the support body 8 by male screws.

In the display device having the above-described configuration, the support body 8 is placed on the console with the open side facing upward, two light emitting diode boards 4 and 4 adjacent in the row direction are arranged in a plurality of rows on one surface 8a of the plate portion 81 of the support body 8, the connector 5 is connected to the connection portion provided at one adjacent end portion of each row of light emitting diode boards 4 and 4, and the flexible tube 20a of the third shaft body 20 is fitted into the fitting hole 86 from the insertion holes 4b and 4b provided at both end portions of each row of light emitting diode boards 4.

After the light-emitting diode substrates 4 of the respective rows are mounted, the light reflection sheet 7 is placed on one surface of the light-emitting diode substrates 4 of the respective rows so as to face each other, the lenses 6 are fitted into the respective holes 73 of the light reflection sheet 7, and the connectors 5 are covered with the bias portions.

The position of the light reflection sheet 7 relative to the plate portion 81 in the direction along the sheet surface can be set by fitting the flexible tube 91 of the first shaft 9 into the first position setting hole 84 of the plate portion 81 from the through hole 74 of the light reflection sheet 7 and fitting the pin 92 into the flexible tube 91, and the circumferential position of the light reflection sheet 7 relative to the plate portion 81 can be set and the light reflection sheet 7 can be moved relative to the portion of the elongated hole 75 by fitting the flexible tube 10a of the second shaft 10 into the second position setting hole 85 of the plate portion 81 from the elongated hole 75 of the light reflection sheet 7 and fitting the pin 10b into the flexible tube 10 a. The pins 20b are fitted into the flexible tubes 20b of the third shaft 20 from the second holes 76 of the light reflection sheet 7, so that the light reflection sheet 7 is mounted on the plate 81 so as to be movable relative to the plate 81, and the eaves 20e suppress the deviation of the reflection sheet 7 in the thickness direction relative to the light emitting diode substrate 4.

After the light reflection sheet 7 is mounted, the optical sheet 2 is placed on the light reflection sheet 7, the display portion a is placed on the optical sheet 2, the peripheral portion of the display portion a is attached to the peripheral portion of the support 8 by a plurality of male screws, and the housing C is attached.

As described above, since the position of the light reflection sheet 7 in the direction of the sheet surface is set by the through hole 74, the first shaft 9, and the first position setting hole 84, and the position of the light reflection sheet 7 in the circumferential direction is set by the elongated hole 75, the second shaft 10, and the second position setting hole 85, and the elongated hole 75 and the attachment portion attached to the support 8 are relatively movable, when the light reflection sheet 7 thermally expands and the light reflection sheet 7 expands and contracts in the direction of the sheet surface, the expansion and contraction can be absorbed by the elongated hole 75 and the second hole 76, and the elongated hole 75 and the second shaft 10 can prevent the light reflection sheet 7 from being displaced in the circumferential direction about the first shaft 9, and the light reflection sheet 7 can be secured in an appropriate position with respect to the support 8. Therefore, the lens 6 mounted on the light emitting diode substrate 4 and the hole 73 formed in the light reflecting sheet 7 can be maintained in an appropriate positional relationship, the size of the gap between the lens 6 and the hole 73 can be maintained uniform, the occurrence of a shadow at the hole edge portion of the hole 73 can be prevented, and appropriate shell characteristics can be maintained.

Fig. 94 is a vertical cross-sectional side view showing another structure of the first shaft portion, and fig. 95 is a vertical cross-sectional side view showing another structure of the second shaft portion. In the above-described embodiment, the first shaft 9, the second shaft 10, and the third shaft 20 are rivets, but the first shaft 9, the second shaft 10, and the third shaft 20 may be male screws.

When the first shaft body 9 is a male screw, as shown in fig. 94, the first shaft body 9 includes a head portion 9a having a larger diameter than the through hole 74, and a screw portion 9b connected to the head portion 9a and having a slightly smaller diameter than the through hole 74. The screw portion 9b constitutes a setting shaft portion. In this embodiment, the screw portion 9b is inserted into the through hole 74 and screwed into the first position setting hole 84, thereby preventing the light reflection sheet 7 from being displaced in the direction along the sheet surface.

In the case where the second shaft 10 is a male screw, as shown in fig. 95, the second shaft 10 includes a head portion 10f having a diameter larger than the width of the elongated hole 75, a middle diameter shaft portion 10g continuing to the head portion 10f and having a diameter slightly smaller than the width of the elongated hole 75, and a screw portion 10h continuing to the middle diameter shaft portion 10g and having a diameter smaller than the middle diameter shaft portion 10 g. The intermediate diameter shaft 10g constitutes a position setting unit. In this embodiment, the screw portion 10h is inserted through the elongated hole 75 and screwed into the second position setting hole 85, so that the intermediate diameter shaft portion 10g can be fitted into the elongated hole 75 to prevent the light reflection sheet 7 from being displaced in the circumferential direction around the first shaft body 9.

When the third shaft body 20 is a male screw, the third shaft body 20 includes a head portion, a middle diameter shaft portion, and a screw portion, as in the case of the second shaft body 10 shown in fig. 95, and therefore, detailed description and drawings thereof are omitted.

Embodiment mode 6-2

FIG. 96 is a cross-sectional top view showing another structure of the dislocation hole preventing portion. In this display device, instead of connecting the long hole 75 to the hole 73, one of the second holes 76 provided at a position separated from the through hole 74 to the peripheral side is formed as the long hole 75, and the long hole 75 is disposed at a position separated from the hole 73.

In this configuration, since the rigidity of the flat portion 71 around the long hole 75 can be increased, even when a load is applied to the edge of the long hole 75, the flat state of the flat portion 71 can be easily maintained. In embodiment 6-2, one of the second holes 76 may be a long hole 75, and the long hole 75 may be disposed so as to be separated from the second hole 76 in a direction toward the through hole 74.

Embodiment modes 6 to 3

Fig. 97 is a vertical cross-sectional side view showing another structure of the first shaft body 9 and the second shaft body 10. In this display device, instead of providing the long hole 75 at a position separated from the through hole 74 to the peripheral side, the long hole 75 is disposed so as to be continuous with the edge of the through hole 74.

A second position setting hole 85 is opened around the first position setting hole 84 of the plate portion 81. A second insertion hole 4c corresponding to the second position setting hole 85 is opened around one insertion hole 4b of the light emitting diode substrate 4.

The brim 92a of the first shaft 9 is formed in an oblong shape, and the second shaft 10 is integrally provided at the longitudinal end of the brim 92 a. The second shaft 10 is a pin having a diameter smaller than the width of the elongated hole 75, and is disposed parallel to the first shaft 9.

The long hole 75 is long in a direction away from the center of the through hole 74, and is narrow in a direction perpendicular to the direction of the separation. The width of the elongated hole 75 is substantially equal to the diameter of the second shaft body 10.

In the present embodiment, when the first shaft 9 is inserted through the first position setting hole 84, the second shaft 10 can be inserted through the second position setting hole 85, and therefore, forgetting to attach the second shaft 10 can be avoided. In addition, since the number of mounting steps of the second shaft 10 can be reduced, the assembling workability can be improved.

Embodiments 6 to 4

Fig. 98 is a schematic perspective view showing another configuration of the light source device, and fig. 99 is a front view showing another configuration of a misalignment preventing portion of the light reflecting sheet. In this light source device, a through hole 74 is formed in the center of the flat portion 71, four narrow eaves pieces 77 connected to the outer edge of the corner frame portion 72(B52) at the folding line 7a are provided, long holes 78 are formed at both ends of each eaves piece 77, and a position setting protrusion 87 inserted into the long hole 78 is provided in the eaves portion 83 at the corner of the support body 8.

The overhang piece 77 includes a long overhang piece 77a connected to the long side of the substantially rectangular flat portion 71 and a short overhang piece 77b connected to the short side of the flat portion 71, and long holes 78 that are long in the longitudinal direction of the long overhang piece 77a are provided at both ends of the long overhang piece 77a, and long holes 78 that are long in the longitudinal direction of the short overhang piece 77b are provided at both ends of the short overhang piece 77 b.

The position setting protrusion 87 is smaller than the elongated hole 78, and the position setting protrusion 87 is formed by cutting a part of the brim 83. The following structure is adopted: that is, a part of the periphery of the position setting protrusion 87 contacts the edge of the long hole 78 to prevent the light reflecting sheet 7 from being displaced in the circumferential direction, and the expansion and contraction of the light reflecting sheet 7 due to thermal expansion can be absorbed by the gap between the position setting protrusion 87 and the long hole 78.

In the present invention, since the long hole 78 is provided in the overhang 77 that is disposed between the peripheral portion of the display portion a and the peripheral portion of the support 8 and is not involved in light reflection, it is possible to prevent the light reflectivity from being lowered by the long hole 78 as the misalignment preventing hole, and thus it is possible to obtain a light reflectivity sheet with further improved light reflectivity.

In the embodiment described above, the through hole 74 is opened in the center portion of the flat portion 71, but in addition to this, the through hole 74 may be opened so as to be spaced apart from the center portion of the flat portion 71 toward the peripheral side, and the positional relationship between the through hole 74 and the elongated holes 75 and 78 is not particularly limited.

In the above-described embodiment, the misalignment preventing hole is a long hole, but the misalignment preventing hole is not limited to a long hole as long as it has a shape capable of preventing the light reflecting sheet 7 from being misaligned in the circumferential direction by engaging with the second position setting portion while absorbing shrinkage caused by thermal expansion of the light reflecting sheet.

In the above-described embodiment, the third shaft body 20 for fixing the light emitting diode substrate 4 also serves as the second shaft body 10, but in addition to this, the first shaft body 9, the second shaft body 10, and the third shaft body 20 may be independent shaft members.

In the embodiment described above, the first shaft body 9 is used as the first position setting portion and the second shaft body 10 is used as the second position setting portion, but in addition, the first position setting portion and the second position setting portion may be shaft members attached to the plate portion 81 or shaft members attached to the light emitting diode substrate fixed to the plate portion 81.

Embodiment 7

Fig. 100 is a sectional view showing a main part of a structure of a light source device according to embodiment 7, fig. 101 is a plan view of a part of the light source device, fig. 102 is a plan view obtained by disassembling a part of the light source device, fig. 103 is a plan view of a part of a member of the light source device, fig. 104 is a plan view obtained by enlarging a part of the light source device, fig. 105 is an enlarged perspective view of a connector, fig. 106 is a plan view schematically showing a structure of a connector, fig. 107 is a plan view showing a dimensional relationship of an insertion hole, fig. 108 is a perspective view showing a structure of a light emitting diode substrate on which a lens is mounted, and fig. 109 is a sectional view showing an example of a fixture.

The light source device includes: a plurality of light emitting diode substrates 2(B3), the plurality of light emitting diode substrates 2(B3) being arranged in parallel with each other in a spaced apart manner, and a plurality of light emitting diodes 1(B1) being mounted on one surface 2a thereof; a plurality of lenses 3(B2), the plurality of lenses 3(B2) being mounted on the one surface 2a of the light emitting diode substrate 2 so as to face the top of each light emitting diode 1, and diffusing light emitted from the light emitting diode 1; a reflection sheet 4(B5), the reflection sheet 4(B5) having a through hole 41(B53) for disposing the lens 3 therein, being placed on the one surface 2a of the light emitting diode substrate 2, and reflecting light emitted from the light emitting diode 1; a plurality of connectors 5(B4), the plurality of connectors 5(B4) connecting the adjacent light emitting diode substrates 2, 2 to each other; and a support 6(B6), the support 6(B6) being positioned on the side of the other surface 2B of the light-emitting diode substrates 2 and supporting the plurality of light-emitting diode substrates 2.

The light emitting diode substrate 2(B3) has a circuit portion on one surface 2a thereof, and has a rectangular shape (rectangular shape) with a large ratio of length to width. A plurality of light emitting diodes 1 are mounted on one surface 2a of each of the light emitting diode substrates 2 so as to be separated from each other at substantially the same interval in the longitudinal direction. The light emitting diode substrate 2 is a single-sided substrate having a conductive portion on only one side 2 a. A plurality of rectangular light emitting diode substrates 2 are arranged side by side so as to be separated from each other in the longitudinal direction and the width direction on one surface 6a of a substantially rectangular support 6, with the longitudinal direction of the substrates being aligned in the same direction. In fig. 102, the following example is shown: that is, the light emitting diode substrate 2 on which 6 light emitting diodes 1 are mounted is disposed at the center, the light emitting diode substrates 2 on which 5 light emitting diodes 1 are mounted are disposed on both sides thereof, and three light emitting diode substrates 2 connected in a row by this are disposed in 8 rows in the width direction, and the mounting intervals of the light emitting diodes 1 on the light emitting diode substrates 2 are made substantially the same. The light emitting diodes 1 on all the light emitting diode substrates 2 are arranged at substantially the same two-dimensional intervals.

The light-emitting diode substrate 2 has connection portions 21 and 22(B31 and B32) at both ends in the longitudinal direction of the one surface 2 a. Among the three light emitting diode substrates 2 arranged in a row, the connection portions 21, 21 of the adjacent light emitting diode substrates 2 are connected to each other by the connector 5. As will be described later, the connection portion 22 of the light emitting diode substrate 2 located at one end of the column is connected to the power supply circuit substrate via a connector, and the connection portion 22 of the light emitting diode substrate 2 located at the other end of the column is connected to a short-circuit connector.

The connector 5(B4) includes a plug 51 connected to one of the connection portions 21 and a receptacle 52 connected to the other connection portion 21, and the connector 5(B4) has a substantially rectangular parallelepiped shape. The socket 52 is provided with a plurality of pin electrodes 52a facing the longitudinal direction of the light emitting diode substrate 2, and the plug 51 is provided with a plurality of metal fittings 51a into which the pin electrodes 52a of the socket 52 are fitted. The metal fittings 51a of the plug 51 are connected to one of the connection portions 21 by a solder reflow process, and the pin electrodes 52a of the socket 52 are connected to the other connection portion 21 by a solder reflow process. The plug 51 is attached to the socket 52, and the pin electrodes 52a of the socket 52 are fitted into the metal fittings 51a of the plug 51, thereby electrically connecting the two adjacent light emitting diode substrates 2.

The lens 3(B2) includes a light transmitting portion 31(B21) and three positioning protrusions 32(B22), the light transmitting portion 31(B21) is opposed to the top of the light emitting diode 1 separately and has a hemispherical concave portion for diffusing the light emitted by the light emitting diode 1 to the four sides, the positioning protrusions 32(B22) protrude from the surface of the light transmitting portion 31 facing the one surface 2a toward the light emitting diode substrate 2, the lens 3 is positioned with respect to the light emitting diode substrate 2, and the tip ends of the positioning protrusions 32 are attached to the one surface 2a with an adhesive. Light-transmitting portion 31 is formed slightly smaller than through hole 41 of reflection sheet 4.

The reflection sheet 4(B5) is formed of a single synthetic resin sheet having light reflectivity and being substantially rectangular corresponding to the support 6, and has through holes 41 formed in a circular shape having a diameter slightly larger than the light transmission portion 31 and arranged in a lattice shape at portions corresponding to the lenses 3, respectively, and has second through holes 42 formed in a substantially rectangular shape and through which the connectors 5 can be inserted at portions corresponding to the connectors 5.

The support body 6(B6) is formed by molding a metal plate, and includes a plate portion 61(B61) having a substantially rectangular flat plate shape and a frame portion 62(B62) connected to the periphery of the plate portion 61, and accommodates and supports the light emitting diode substrate 2 in a longitudinal direction and a width direction in parallel on one surface 6a of the plate portion 61.

Insertion holes 2c and 2d (B33 and B34) into which rivets 8(B7) are inserted are formed in one end portion and the other end portion of the rectangular light emitting diode substrate 2 in the longitudinal direction, and the rivets 8(B7) support the light emitting diode substrate 2 on the support body 6. One insertion hole 2c (B33) of the two insertion holes 2c, 2d has a smaller size than the other insertion hole 2d (B34). Specifically, one insertion hole 2c is a circular hole having a diameter of 2c1, and the other insertion hole 2d has a dimension 2d1 in the substrate width direction that is larger than the diameter 2c1 of the insertion hole 2c by a predetermined dimension (for example, about 0.2mm to 0.3 mm), and is oblong in the substrate longitudinal direction. Each of the light emitting diode substrates 2 is arranged such that the smaller-sized insertion hole 2c and the larger-sized insertion hole 2d are adjacent to each other at the end portion where the light emitting diode substrates 2 are connected.

A through hole 61a (B64) is provided in the plate portion 61 of the support body 6 so as to correspond to the position of each of the insertion holes 2c and 2d, and a distance k between the centers of the two insertion holes 2c and 2d is equal to the interval between the two through holes 61a corresponding to each of the insertion holes 2c and 2 d. That is, the light emitting diode substrates 2 and the support body 6 are aligned so that the hole positions of the small-sized insertion holes 2c and the corresponding through holes 61a coincide with each other, and at this time, the corresponding through holes 61a are positioned at the center of the large-sized insertion holes 2d, whereby the positional relationship between the insertion holes 2c, 2d of the respective light emitting diode substrates 2 and the respective through holes 61a is determined.

As shown in fig. 109, the rivet 8(B7) includes: a tube member 81(B71) having an outer diameter g1 through which the insertion holes 2c, 2d and the through hole 61a can be inserted, a flange portion 81a (B71a) which cannot be inserted through the insertion holes 2c, 2d and the through hole 61a is provided at one end thereof, and an inner diameter g3 at the other end thereof is smaller than the inner diameter g2 at the one end thereof; and a shaft member 82(B72), the shaft member 82(B72) having a shaft portion 82a that can be inserted into one end of the tubular member 81 and has a diameter larger than the inner diameter g3 of the other end, and a head portion 82B (B82a) that cannot be inserted through the insertion holes 2c, 2d and the through hole 61 a. The barrel member 81 and the shaft member 82 are made of a synthetic resin material.

The reflecting sheet 4(B5) has a third through hole 43(B54) in the form of an elongated hole continuing to the through hole 41 at a portion corresponding to the rivet 8, and the third through hole 43(B54) has a diameter larger than the diameter of the head portion 82B of the shaft member 82.

Next, a step of supporting the three light emitting diode substrates 2 connected in a row on the support body 6 by the rivet 8 will be described. First, after the insertion holes 2c and 2d of the respective light emitting diode substrates 2 are aligned with the respective through holes 61a of the support body 6, the tubular member 81 is inserted through the insertion hole 2c and the through hole 61a having a small size from the side of the one surface 2a of the respective light emitting diode substrates 2, and the flange portion 81a is brought into contact with the one surface 2a of the light emitting diode substrates 2. Next, when the shaft portion 82a of the shaft member 82 is inserted until the head portion 82b thereof comes into contact with the flange portion 81a of the tube member 81, the distal end portion of the tube member 81 is pushed outward by the shaft portion 82a of the shaft member 82. The distal end portion of the tube member 81 that is expanded outward presses and holds the shaft portion 82a of the shaft member 82 inward, and the distal end portion of the tube member 81 cannot be inserted through the through hole 61a of the support body 6, so that each light emitting diode substrate 2 can be fixed to the support body 6 by the rivet 8.

After the rivet 8 is attached to the small insertion hole 2c as described above, the rivet 8 is attached to the large insertion hole 2d in the same manner, and the respective light emitting diode substrates 2 are fixed to the support body 6 by the rivet 8. At this time, when the positions of the two substrates are shifted from the proper positions in the substrate width direction at the time of connection between the adjacent light emitting diode substrates 2 by the connector 5, the through hole 61a of the support body 6 is not positioned at the center of the insertion hole 2d, but the dimension of the insertion hole 2d in the substrate width direction is increased, so that the through hole 61a does not deviate from the range of the insertion hole 2d, and the rivet 8 can be inserted through the insertion hole 2d and the through hole 61a and mounted.

After the rivets 8 are fitted into the insertion holes 2c and 2d of all the light emitting diode substrates 2, the through-holes 41 are inserted through the lenses 3, the second through-holes 42 are inserted through the connectors 5, and the third through-holes 43 are inserted through the rivets 8, and in this state, the reflecting sheet 4 is placed on the light emitting diode substrates 2 so as to face each other.

Fig. 110 is a sectional view showing a structure of a display device including a light source device according to the present invention. The display device includes: a display unit 70(a) having a substantially rectangular parallelepiped shape, the display unit 70(a) having a display surface 72a on the front side thereof; a light source device a (b) disposed at the rear side of the display unit 70; and a housing 71(D) that covers the periphery of the display section 70 and the rear side of the light source device a.

The display unit 70 includes a display panel 72(a1) having a display surface 72a, and an optical sheet 73(C) disposed on the rear side of the display panel 72. The peripheral portion of the display panel 72 is sandwiched forward and backward by the front support frame 74(a2) and the rear support frame 75(A3) to constitute a panel assembly, and the rear support frame 75 is attached to the peripheral portion of the support body 6.

The optical sheet 73 is a laminate in which a thick diffuser plate that diffuses light emitted from the light emitting diode 1 as a light source and a thin synthetic resin sheet including a reflective polarizing plate, a prism sheet, a diffusion sheet, and the like are laminated. The peripheral portion of the optical sheet 73 is sandwiched between the frame portion 62 of the support 6 and the rear holding frame 75.

The housing 71(D) includes a housing front division 71a (D1) that covers the front side of the peripheral portion of the display unit 70, and a deep-disk-shaped housing rear division 71b (D2) that covers the peripheral portion and the rear side of the light source device a, and the housing 71(D) is attached to the frame 62 of the support body 6 by male screws.

Although not shown, a power supply circuit board connected to the connecting electrode portion 22 of the light emitting diode substrate 2 via a second connector (B41) is mounted on one longitudinal side of the other surface 6B of the plate portion 61, and a control circuit board for driving and controlling the display portion is mounted on the other longitudinal side. A signal processing circuit board that processes a video signal displayed on the display surface of the display unit is mounted in the longitudinal center of the other surface of the plate portion 61.

In embodiment 7 described above, the fastener is configured by the rivet 8 formed by the two members of the tubular member 81 and the shaft member 82, but the fastener may be formed by a single member, or may be configured by a screw, a bolt, a nut, or the like other than the rivet.

In embodiment 7 described above, the third through-hole 43 having a diameter larger than the diameter of the head portion 82b of the rivet 8 is provided, and the head portion 82b is disposed in the third through-hole 43 so as to allow the reflection sheet 4 to expand and contract due to thermal expansion, but in addition to this, the following configuration may be adopted: that is, the diameter of the head portion 82b is set larger than the diameter of the third through hole 43, and the outer peripheral portion of the head portion 82b is separated from the periphery of the third through hole 43 of the reflection sheet 4 in the thickness direction and faces the periphery, whereby the reflection sheet 4 can be prevented from being biased in the direction of separating from the light emitting diode substrate 2 by the head portion 82 b.

In embodiment 7, two insertion holes 2c and 2d are provided at both ends in the longitudinal direction of the rectangular light emitting diode substrate 2, but as illustrated in fig. 111A and 111B, three or more insertion holes 2c and 2d may be provided at a plurality of positions in the longitudinal direction of the light emitting diode substrate 2. In fig. 111A, the following case is shown: that is, the insertion holes 2c having a small size are not provided at the end portions of the light emitting diode substrate 2 in the longitudinal direction, but are provided at the inner portions of the light emitting diode substrate 2 in the longitudinal direction, and the insertion holes 2d having a large size are provided at both end portions of the light emitting diode substrate in the longitudinal direction, and fig. 111B shows the following case: that is, the insertion holes 2c having a small size are not provided at the end portions of the light emitting diode substrate 2 in the longitudinal direction, but are provided at the inner portions of the light emitting diode substrate 2 in the longitudinal direction, and the insertion holes 2d having a large size are provided at the other three portions including both end portions in the longitudinal direction. Although not shown, the reflection sheet 4 is provided with through holes having a diameter larger than the diameter of the head portion 82b of the shaft member 82 of the rivet 8 at positions corresponding to the insertion holes 2c and 2 d. In the present embodiment, when a plurality of rectangular light emitting diode substrates 2 are connected in a row, the end portions of the light emitting diode substrates 2 provided with the insertion holes 2d having a large size are arranged adjacent to each other, and the connector connection can more reliably absorb the displacement between the light emitting diode substrates 2.

In embodiment 7 described above, the light source device according to the present invention is applied to illumination of a display panel of a liquid crystal display device, but the light source device can also be applied to illumination of a display panel of a light-emitting display device other than a liquid crystal display device.

Embodiment 8

Fig. 112 is a sectional view showing a main part of the structure of a light source device according to embodiment 8, fig. 113 is a plan view of a part of the light source device, fig. 114 is a plan view obtained by decomposing a part of the light source device, fig. 115 is a plan view of a part of a member of the light source device, fig. 116 is a plan view obtained by enlarging a part of the light source device, fig. 117 is a perspective view showing the structure of a light emitting diode substrate on which a lens is mounted, fig. 118 is a sectional view showing the structure of a rivet, fig. 119 is a plan view at a V-V line of fig. 118, and fig. 120 is a sectional view showing a positional relationship between the rivet and the lens.

The light source device includes: a plurality of light emitting diode substrates 2(B3), the plurality of light emitting diode substrates 2(B3) being arranged in parallel with each other in a spaced apart manner, and a plurality of light emitting diodes 1(B1) being mounted on one surface 2a thereof; a plurality of lenses 3(B2), the plurality of lenses 3(B2) being mounted on the one surface 2a of the light emitting diode substrate 2 so as to face the top of each light emitting diode 1, and diffusing light emitted from the light emitting diode 1; a reflection sheet 4(B5), the reflection sheet 4(B5) having a through hole 41(B53) for disposing the lens 3 therein, being placed on the one surface 2a of the light emitting diode substrate 2, and reflecting light emitted from the light emitting diode 1; and a support 6(B6), the support 6(B6) being positioned on the side of the other surface 2B of the light-emitting diode substrates 2 and supporting the plurality of light-emitting diode substrates 2.

The light emitting diode substrate 2(B3) has a circuit portion on one surface 2a thereof, and has a rectangular shape (rectangular shape) with a large ratio of length to width. A plurality of light emitting diodes 1 are mounted on one surface 2a of each of the light emitting diode substrates 2 so as to be separated from each other at substantially the same interval in the longitudinal direction. The light emitting diode substrate 2 is a single-sided substrate having a conductive portion on only one side 2 a. A plurality of rectangular light emitting diode substrates 2 are arranged side by side so as to be separated from each other in the longitudinal direction and the width direction on one surface 6a of a substantially rectangular support 6, with the longitudinal direction of the substrates being aligned in the same direction. In fig. 114, the following example is shown: that is, the light emitting diode substrate 2 on which 6 light emitting diodes 1 are mounted is disposed at the center, the light emitting diode substrates 2 on which 5 light emitting diodes 1 are mounted are disposed on both sides thereof, and three light emitting diode substrates 2 connected in a row by this are disposed in 8 rows in the width direction, and the mounting intervals of the light emitting diodes 1 on the light emitting diode substrates 2 are made substantially the same. Then, the light emitting diodes 1 on all the light emitting diode substrates 2 are arranged at substantially the same interval in two dimensions.

The light-emitting diode substrate 2 has connection portions 21 and 22(B31 and B32) at both ends in the longitudinal direction of the one surface 2 a. Among the three light-emitting diode substrates 2 arranged in a row, the connection portions 21, 21 of the adjacent light-emitting diode substrates 2 are connected to each other by the connector 5 (B4). As will be described later, the connection portion 22 of the light emitting diode substrate 2 located at one end of the column is connected to the power supply circuit substrate via a connector, and the connection portion 22 of the light emitting diode substrate 2 located at the other end of the column is connected to a short-circuit connector.

The lens 3(B2) includes: a light-transmitting portion 31(B21) which is disposed apart from the one surface 2a of the light-emitting diode substrate 2, faces the top of the light-emitting diode 1 apart from the top thereof, and has a hemispherical concave portion 31a for diffusing the light emitted from the light-emitting diode 1 in the circumferential direction; and three positioning projections 32(B22), the three positioning projections 32(B22) projecting toward the light-emitting diode substrate 2 from the opposing surface 31B of the light-transmitting portion 31 opposing the one surface 2a of the light-emitting diode substrate 2 and positioning the lens 3 with respect to the light-emitting diode substrate 2, the distal ends of the positioning projections 32 being attached to the one surface 2a of the light-emitting diode substrate 2 with an adhesive.

The reflection sheet 4(B5) is formed of a single synthetic resin sheet having light reflectivity and being substantially rectangular corresponding to the support 6, and has through holes 41 formed in a circular shape having a diameter slightly larger than the light transmission portion 31 and arranged in a lattice shape at portions corresponding to the lenses 3, respectively, and second through holes 42 formed in a substantially rectangular shape and through which the connector 5 can be inserted at portions corresponding to the connector 5. The through hole 41 is formed slightly larger than the light transmission portion 31 of the lens 3.

The support body 6(B6) is formed by molding a metal plate, and includes a plate portion 61(B61) having a substantially rectangular flat plate shape and a frame portion 62(B62) connected to the periphery of the plate portion 61, and accommodates and supports the light emitting diode substrate 2 in parallel in the longitudinal direction and the width direction on one surface 6a of the plate portion 61.

Through holes 2c and 2d (B33 and B34) into which rivets 8(B7) are inserted are formed in one end and the other end of the rectangular light emitting diode substrate 2 in the longitudinal direction, and the rivets 8(B7) support the light emitting diode substrate 2 on the support body 6. One through hole 2c (B33) of the two through holes 2c and 2d is a circular hole, and the other through hole 2d (B34) is an oblong shape elongated in the longitudinal direction of the substrate. The plate portion 61 of the support 6 is provided with a through hole 61a (B64) corresponding to the positions of the through holes 2c and 2 d.

The rivet 8(B7) includes: a tube member 81(B71) having an outer diameter g1 through which the through holes 2c and 2d of the light emitting diode substrate 2 and the through hole 61a of the support body 6 can be inserted, a flange portion 81a (B71a) which cannot penetrate the through holes 2c and 2d and the through hole 61a being provided at one end thereof, and an inner diameter g3 at the other end thereof being smaller than the inner diameter g2 at the one end thereof; and a shaft member 82(B72) having a diameter larger than the inner diameter g3 of the other end, the shaft member 82(B72) being insertable into one end of the tubular member 81, and a head 82a (B72a) being provided at one end of the shaft member 82 and being incapable of passing through the through holes 2c and 2d and the through hole 61 a. The head 82a has a disc shape having an annular convex portion protruding toward the shaft member 82 on the outer circumferential side. The barrel member 81 and the shaft member 82 are made of a synthetic resin material.

The head 82a of the rivet 8 is provided with a plurality of grooves 82B (B74) that open toward the outer peripheral portion on the side facing the one surface 2a of the light-emitting diode substrate 2. Specifically, the annular projection is provided with three grooves 82b, and the three grooves 82b are formed radially about a central portion 82 of a head portion 82a connected to the shaft member 82 and at approximately 120 degrees from each other. Each groove 82b has a predetermined width.

The bottom of the groove 82b is located closer to the one surface 2a of the light-emitting diode substrate 2 than the outer peripheral end of the opposing surface 31b of the light-transmitting portion 31 of the lens 3 opposing the one surface 2a of the light-emitting diode substrate 2. Fig. 120 shows an example in which the bottom of groove 82b is located on the side of first surface 2a, and the distance between the bottom of groove 82b and the outer peripheral end of opposing surface 31b of light-transmitting portion 31 is k. Thus, the light emitted from the outer peripheral portion of light-transmitting portion 31 is reflected by the outer surface of head portion 82a of rivet 8 or passes through without being reflected, without entering the inside of groove 82b, to become illumination light.

A third through hole 43(B54) in the form of an elongated hole continuing to the second through hole 42 is opened in the reflection sheet 4 at a portion corresponding to the rivet 8, and the third through hole 43(B54) has a diameter larger than that of the head portion 82 a.

Next, a step of supporting the three light emitting diode substrates 2 connected in a row on the support body 6 by the rivet 8 will be described. First, after the through holes 2c and 2d of the respective light emitting diode substrates 2 and the through holes 61a of the support body 6 are aligned, the tube member 81 is inserted from the side of the one surface 2a of the respective light emitting diode substrates 2 through the through holes 2c and the through holes 61a, and the flange portion 81a is brought into contact with the one surface 2a of the light emitting diode substrates 2. Next, when the shaft member 82 is inserted until the head portion 82a thereof comes into contact with the flange portion 81a of the tube member 81, the distal end portion of the tube member 81 is pushed outward by the distal end side of the shaft member 82. The distal end portion of the tube member 81 that is expanded outward presses and holds the distal end side of the shaft member 82 inward, and the head portion 82a cannot be inserted through the through hole 61a of the support body 6, so that each light emitting diode substrate 2 can be fixed to the support body 6 by the rivet 8. After the rivet 8 is attached to the through-hole 2c having a circular hole as described above, the rivet 8 is also attached to the through-hole 2d having an elongated hole in the same manner, and the respective light emitting diode substrates 2 are fixed to the support body 6 by the rivet 8.

After the rivets 8 are attached to the through holes 2c and 2d of all the light emitting diode substrates 2, the through holes 41 are inserted through the lenses 3, the second through holes 42 are inserted through the connectors 5, and the third through holes 43 are inserted through the rivets 8, and in this state, the reflecting sheet 4 is placed on the light emitting diode substrates 2 so as to face each other, thereby completing the light source device.

Next, a procedure of releasing the state in which each light emitting diode substrate 2 is fixed to the support body 6 by the rivet 8 will be described. For example, as shown in fig. 116, one groove 82b of the three grooves 82b provided in the head 82a is located on the side adjacent to the lens 3, and therefore the lens 3 becomes an obstacle, and a screwdriver cannot be inserted into the groove 82 b. However, since the lens 3 does not act as an obstacle in the two grooves 82b at positions at 120 degrees from the grooves 82b, when a screwdriver is inserted into one of the two grooves 82b and the head 82a is forcibly moved to a side away from the light-emitting diode substrate 2, the distal end portion of the tube member 81, which is expanded outward, returns to the original diameter, and the tube member 81 is inserted through the through hole 61a of the support body 6 and the through holes 2c and 2d of the light-emitting diode substrate 2, thereby releasing the fixed state between the light-emitting diode substrate 2 and the support body 6.

Fig. 121 is a sectional view showing a structure of a display device including the light source device of embodiment 8. The display device includes: a display unit 70(a) having a substantially rectangular parallelepiped shape, the display unit 70(a) having a display surface 72a on the front side thereof; a light source device a (b) disposed at the rear side of the display unit 70; and a housing 71(D) that covers the periphery of the display section 70 and the rear side of the light source device a.

The display unit 70 includes a display panel 72(a1) having a display surface 72a, and an optical sheet 73(C) disposed on the rear side of the display panel 72. The peripheral portion of the display panel 72 is sandwiched forward and backward by the front support frame 74(a2) and the rear support frame 75(A3) to constitute a panel assembly, and the rear support frame 75 is attached to the peripheral portion of the support body 6.

The optical sheet 73 is a laminate in which a thick diffuser plate that diffuses light emitted from the light emitting diode 1 as a light source and a thin synthetic resin sheet including a reflective polarizing plate, a prism sheet, a diffusion sheet, and the like are laminated. The peripheral portion of the optical sheet 73 is sandwiched between the frame portion 62 of the support 6 and the rear holding frame 75.

The housing 71(D) includes a housing front division 71a (D1) that covers the front side of the peripheral portion of the display unit 70, and a deep-disk-shaped housing rear division 71b (D2) that covers the peripheral portion and the rear side of the light source device a, and the housing 71(D) is attached to the frame 62 of the support body 6 by male screws.

Although not shown, a power supply circuit board connected to the connecting electrode portion 22 of the light emitting diode board 2 via a connector (B41) is mounted on one longitudinal side of the other surface 6B of the plate portion 61, and a control circuit board for driving and controlling the display portion is mounted on the other longitudinal side. A signal processing circuit board that processes a video signal displayed on the display surface of the display unit is mounted in the longitudinal center of the other surface 6b of the plate portion 61.

Next, another embodiment of the rivet 8 will be described. Fig. 122 is a plan view showing the back side of the head of a rivet of another light source device according to embodiment 8, and fig. 123 is an enlarged plan view of a part of the another light source device. In this other embodiment, the annular projection of the head 82a of the rivet 8(B7) is provided with two grooves 82c, and the two grooves 82c are formed radially about the central portion 82 of the head 82a continuous with the shaft member 82 and at substantially 90 degrees to each other. As shown in fig. 123, one groove 82c of the two grooves 82c (B74) is located adjacent to the lens 3, and the lens 3(B2) becomes an obstacle and the driver cannot be inserted into the one groove 82c, but even in such a case, the lens 3 does not become an obstacle with respect to the other groove 82c, and the driver can be inserted into the other groove 82 c.

Next, a second another embodiment of the rivet 8 will be described. Fig. 124 is a plan view showing the back side of the head of a rivet of a second another light source device according to embodiment 8. In the second embodiment, the annular projection of the head 82a of the rivet 8(B7) is provided with two grooves 82d, the two grooves 82d being radially formed at approximately 60 degrees from each other with the central portion 82 of the head 82a continuous with the shaft member 82 as the center, and one groove 82d of the two grooves 82d is located on the side adjacent to the lens 3, so that the driver cannot be inserted into the one groove 82d, but even in this case, the driver can be inserted into the other groove 82 d. The angle formed by the plurality of grooves may be any angle other than 120 degrees, 90 degrees, and 60 degrees. In this case, in order to avoid the plurality of grooves from being in a state in which the driver cannot be inserted at the same time, at least one of the plurality of grooves needs to be located at a position deviated from a straight line connecting the center portion of the head portion 82a connected to the shaft portion 82 and the other groove.

In embodiment 8 described above, the third through-hole 43 having a diameter larger than the diameter of the head portion 82a of the rivet 8 is provided, and the head portion 82a is disposed in the third through-hole 43, whereby the reflector sheet 4 can be allowed to expand and contract due to thermal expansion, but in addition to this, the following configuration may be adopted: that is, the diameter of the head portion 82a is set larger than the diameter of the third through hole 43, and the outer peripheral portion of the head portion 82a is separated from the periphery of the third through hole 43 of the reflection sheet 4 in the thickness direction and faces the periphery, thereby preventing the reflection sheet 4 from being biased in the direction of separating from the light emitting diode substrate 2 by the head portion 82 b.

In embodiment 8, the light source device according to the present invention is applied to illumination of a display panel of a liquid crystal display device, but the light source device can also be applied to illumination of a display panel of a light-emitting display device other than a liquid crystal display device.

Embodiment 9

Fig. 125 is a longitudinal sectional view showing a partial structure of a display device 7 including the light source device 1 according to the embodiment of the present invention. The left-right direction in fig. 125 is the same as the front-back direction of the display device 7, and further the front-back direction of the light source device 1.

Fig. 126 and 127A are a horizontal sectional view and a front view showing a structure of a connection portion between the circuit boards 2 and 2 provided in the light source device 1, and fig. 127B is a front view showing a relationship between the circuit boards 2 and 2 provided in the light source device 1 and the mounting member 6. The vertical direction in fig. 126 is the same as the front-rear direction of the display device 7, and further the front-rear direction of the light source device 1 (B). Fig. 126 corresponds to a cross-sectional view taken along line VI-VI in fig. 127A.

Fig. 128 is a perspective view schematically showing a state where the circuit boards 2, and … … are arranged side by side, and shows a state before the reflection sheet 4 is mounted on the mounting member 6.

As shown in fig. 125, the display device 7 includes a display unit 70(a), a housing 71(D), a front side housing 72(a2), a rear side housing 73(A3), and a light source device 1 (B).

Next, the structure of the light source device 1 will be explained first.

As shown in fig. 125 to 128, the light source device 1(B) includes a plurality of circuit boards 2, … … (B3), a reflection sheet 4(B5), and a mounting member 6 (B6).

Each circuit board 2(B3) has a rectangular plate shape elongated in the left-right direction, and a first connection portion (for example, a male connection portion) 21 is attached to the right end portion of the front surface 2a, and a second connection portion (in this case, a female connection portion) 22 is attached to the left end portion of the front surface 2 a. That is, the direction in which the first connection portion 21 and the second connection portion 22 are separated is the left-right direction.

Further, on the upper surface 2a between the first connection portion 21(B31) and the second connection portion 22(B32) on the circuit board 2, a plurality of (five in fig. 128) light emitting portions 23, … … (B1) are mounted at appropriate intervals in the longitudinal direction.

A driver, not shown, for driving the light emitting units 23, and … … is mounted on the circuit board 2.

Here, each light emitting unit 23(B1) uses a light emitting diode.

Further, on the front surface 2a of each circuit board 2, a plurality of lenses 24, … … (B2) are provided in one-to-one correspondence with the light emitting portions 23, … …. Each lens 24 is circular and is disposed to face the top of the light emitting unit 23. The lens 24 diffuses the light emitted from the light emitting section 23.

Mounting member 6(B6) is formed by molding a metal plate, has a rectangular plate shape, and includes a flat plate portion 61(B61) having a rectangular flat plate shape, and a frame portion 62(B62) connected to the periphery of flat plate portion 61. The longitudinal direction (or the short-side direction) of the flat plate portion 61 is the same as the lateral direction (or the vertical direction).

The circuit boards 2, and … … are mounted on the front surface 6a of the flat plate portion 61 in a matrix arrangement. As a result, the light emitting units 23, and … … (B1) are arranged in a matrix. Fig. 128 illustrates a state in which two circuit boards 2, and … … are arranged in the left-right direction and five circuit boards are arranged in the up-down direction.

Further, a power supply circuit board (not shown) for supplying power to the drivers of the circuit boards 2, and … … is mounted on the rear left end of the mounting member 6 (B10 a). Further, a control circuit board for driving and controlling the display unit 70 is mounted on the right end portion of the back surface of the mounting member 6.

On the circuit boards 2 and 2 adjacent to each other in the left-right direction, the first connection portion 21 of the circuit board 2 disposed on the left side is electrically connected to the second connection portion 22 of the circuit board 2 disposed on the right side via the first connector 25(B4) bridging the first connection portion 21 and the second connection portion 22.

Second connection portions 22, and … … of circuit boards 2, and … … mounted on the leftmost end of flat plate portion 61 are electrically connected to the power supply circuit board via second connectors (B41), not shown.

The second connection portions 22, … … of the circuit boards 2, … … mounted on the rightmost end of the flat plate portion 61 are connected to short-circuit connectors, respectively.

The reflection sheet 4(B5) is formed of a synthetic resin sheet, and at least the front surface of the reflection sheet 4 has high reflectivity for reflecting light emitted from the light emitting parts 23, … …. The reflection sheet 4 is rectangular in shape corresponding to the shape of the mounting member 6, and is attached to the front surface side of the mounting member 6.

Circular through holes 41, … … are formed in the reflection sheet 4 at positions corresponding to the positions where the lenses 24, … … are arranged (B53). In addition, rectangular through holes 42, … … are formed in the reflection sheet 4 at positions corresponding to the arrangement positions of the first connectors 25, … ….

The lenses 24, and … … are disposed inside the through holes 41, and … …, and the first connectors 25, and … … are disposed inside the through holes 42, and … …, and in this state, the reflection sheet 4 is laminated on the front surfaces 2a, and … … of the circuit boards 2, and … …, respectively.

Next, the structure of the display device 7 shown in fig. 125 will be described.

The light source device 1(B) illuminates the display unit 70(a), and is disposed on the back surface side of the display unit 70.

The display portion 70 has a rectangular shape and includes a display panel 701(a1) and an optical sheet 702 (C).

The display panel 701 is, for example, a liquid crystal display panel, and the front surface of the display panel 701 constitutes a display surface 7a on which an image is displayed.

The optical sheet 702 is disposed between the display panel 701 and the lenses 24, and … … so as to face the back surface of the display panel 701, and diffuses light emitted from the light emitting units 23, and … …. The optical sheet 702 is a laminate formed by laminating a thick diffusion plate and a thin synthetic resin sheet formed of a reflective polarizing plate, a prism sheet, a diffusion sheet, or the like.

The display panel 701 has a peripheral portion of the display panel 701 sandwiched between the front frame 72 and the rear frame 73 in the front-rear direction, thereby constituting a panel assembly.

The rear frame 73 is attached to the frame 62 of the mounting member 6, and the optical sheet 702 is sandwiched between the rear frame 73 and the frame 62 in the front-rear direction.

The housing 71(D) houses the panel assembly, the optical sheet 702, and the light source device 1 in a state where the display surface 7a is exposed from the front opening and the portion other than the display surface 7a is shielded.

A signal processing circuit board that processes a video signal displayed on the display surface of the display panel 701 is mounted on the central portion in the left-right direction of the rear surface of the flat plate portion 61 of the mounting member 6 (B6).

When manufacturing the light source device 1 of the display device 7 as described above, the manufacturer mounts the circuit boards 2, and … … (B3) on the flat plate portion 61(B61) of the mounting member 6 (B6). When the circuit boards 2 are mounted, the marks 31, 32, and 33(B38 and B35) shown in fig. 126 to 128 are formed on the circuit boards 2, so that the manufacturer can easily and accurately check the left-right direction orientation of the circuit boards 2 (hereinafter, simply referred to as the orientation of the circuit board 2).

The marks 31, 32, and 33 are concave marks indicating the orientation of the circuit board 2.

The markers 31 and 32(B38) are disposed in the vicinity of the first connection portion 21. The mark 31 is a cut-out portion having a rectangular shape and penetrating from the front surface 2a to the back surface of the circuit board 2 at the upper end portion of the circuit board 2. Similarly, the mark 32 is a cut-out portion having a rectangular shape at the lower end portion of the circuit board 2.

The mark 33(B35) is disposed in the vicinity of the second connection portion 22. The mark 33 is a circular hole penetrating from the front surface 2a to the back surface of the circuit board 2 in the vertically central portion of the circuit board 2.

The inner diameter of the marker 33 is larger than the inner dimensions of the markers 31, 32.

The marks 31, 32 and 33 are formed on the right and left ends of the circuit board 2 (in other words, on one side and the other side in the left-right direction of the circuit board 2), respectively, and the number, size and shape thereof are different from each other.

Therefore, the operator can easily and accurately determine that the side of the circuit board 2 on which the marks 31 and 32 are formed is the right side and the side of the circuit board 2 on which the mark 33 is formed is the left side.

Furthermore, the marks 31, 32 and the mark 33 may also have the same size and/or shape. In addition, when the sizes and/or shapes are different, the number of marks formed on the right side of the circuit board 2 may be the same as the number of marks formed on the left side.

On the other hand, on the mounting member 6(B6), the markers 51, 52, 53(B69B, B68) are formed at each mounting position of the circuit substrate 2.

The marks 51, 52, 53 are convex marks indicating the mounting positions of the circuit board 2, and the marks 51, 52, 53 are provided on the front surface 6a of the flat plate portion 61 in a protruding manner. Marks 51, 52, and 53 may be integrally formed on flat plate portion 61, or may be marks formed by fixing a member provided separately from mounting member 6 to front surface 6 a.

The markers 51 and 52(B69B) are arranged near the position where the first connection unit 21 is arranged. The mark 53 is disposed near the position where the second connection portion 22 is disposed. The marks 51, 52, 53 are spaced from each other by a distance corresponding to the spacing of the marks 31, 32, 33 from each other.

The mark 51 (or the mark 52) has a quadrangular prism shape, and the mark 51 (or the mark 52) is embedded in the mark 31 (or the mark 32) to be engaged therewith. The logo 53 is cylindrical and the logo 53 is embedded in the marker 33 to engage therewith. That is, the marks 51, 52, 53 have the number, size, and shape corresponding to the marks 31, 32, 33 to be engaged.

The operator can avoid determining the wrong direction of the circuit board 2 by observing the marks 31, 32, and 33 and touching the marks 31, 32, and 33 with a finger. Further, by directly observing the marks 51, 52, 53 or observing the marks 51, 52, 53 through the marks 31, 32, 33 and bringing the marks 51, 52, 53 into contact with a finger or the circuit board 2, the mounting position of the circuit board 2 can be easily and accurately grasped.

Further, the operator can easily, accurately, and uniquely position the circuit substrate 2 by bringing the circuit substrate 2 into contact with the mounting member 6 to embed the marks 51, 52, 53 into the marks 31, 32, 33.

Therefore, the operator can mount the circuit board 2, which is arranged at the correct position in the correct direction, on the mounting member 6. In this case, the operator fixes the circuit board 2 to the flat plate portion 61 with a plurality of rivets (B7), for example, not shown.

In this case, the circuit board 2 can be mounted with the right and left sides thereof being reversed. This is because the marks 31, 32, and 33 and the marks 51, 52, and 53 on the left and right sides of the circuit board 2 are different in number, size, and shape from each other.

In the case where the mark 33 and the mark 53 are not formed, the outer edge shapes of the right and left end portions of the circuit board 2 may be different from each other to indicate the direction of the circuit board 2, and these may be regarded as the marks 31 and 32. In this case, the operator can easily and accurately determine that the side of the circuit board 2 on which the marks 31 and 32 are formed is the right side and the side of the circuit board 2 on which the marks 31 and 32 are not formed is the left side.

Further, the operator can easily, accurately, and uniquely position the circuit board 2 by bringing the circuit board 2 into contact with the flat plate portion 61 to fit the marks 51, 52 into the marks 31, 32.

In embodiment 9, a configuration in which a plurality of marks and the same number of marks are formed on the circuit board 2 and the mounting member 6 is illustrated, but the present invention is not limited to this. For example, only one of the marks 31, 32, and 33 and any one of the marks 51, 52, and 53 may be formed. In this case, the orientation of the circuit board 2 can be easily and accurately determined, and the circuit board 2 can be positioned.

The mark formed on the circuit board 2 may be configured to be used only for confirming the orientation of the circuit board 2 and not for positioning. In this case, it is not necessary to form a mark for engaging with the mark on the mounting member 6. In addition, the mark may be convex. Alternatively, the mark may be formed such that the corner portion of the right end portion of the circuit board 2 is formed in a right-angled shape and the corner portion of the right end portion is formed in an arc shape, or the right end surface of the circuit board 2 is formed with irregularities and the left end surface is formed smoothly.

In the manufacturing operation of the light source device 1 as described above, and further, in the manufacturing operation of the display device 7, the efficiency of the mounting operation of the circuit substrates 2, … … is improved.

However, the circuit board 2 may be positioned by printing positioning marks on the circuit board 2 and the mounting member 6, respectively. However, in this case, if the mark printed on the mounting member 6 is hidden by the circuit board 2 to be mounted, it is necessary to separate the circuit boards 2 one by one from the mounting position to observe whether or not the mark and/or the print position of the mark is printed on the mounting member 6.

That is, the method of forming the convex marks 51, 52, 53 on the mounting member 6, which can easily grasp the presence and/or the formation position thereof by the tactile sense, is more advantageous for improving the operability.

In general, the colors of the circuit board 2, the mounting member 6, the first connector 25, and the like are colors that can reflect light emitted from the light-emitting portions 23, and … … (for example, white) or colors that do not easily absorb light emitted from the light-emitting portions 23, and … … (for example, cream colors).

The color of the peripheral portions of the marks 31, 32, 33 and the marks 51, 52, 53 in the present embodiment is the same as the color of the circuit board 2 and the mounting member 6, but the color of the peripheral portions of the marks 31, 32, 33 and/or the color of the distal end portions of the marks 51, 52, 53 may be different from the color of the circuit board 2 and the color of the mounting member 6 in order to improve the visibility of the marks. However, the color is limited to a color that reflects light emitted by the light-emitting part 23, … … or a color that does not easily absorb light emitted by the light-emitting part 23, … …. In addition, when the marks 31, 32, and 33 and the marks 51, 52, and 53 are arranged at positions to be covered by the reflection sheet 4, these colors may not be limited.

In embodiment 9, the circuit boards 2, and … … are arranged in a plurality of rows at equal intervals, but the circuit boards 2, and … … may be arranged as follows: that is, the interval dimension on the center side in the arrangement direction is made shorter, and the interval dimension on both sides in the arrangement direction is made longer.

The embodiment 9 disclosed herein is to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined not only by the above meaning but also by the meaning equivalent to the scope of the claims and all modifications within the scope of the claims. For example, the orientation of the circuit board 2 is not limited to the left-right direction, and may be the vertical direction. That is, the first connection portions 21 and 22 may be arranged to be separated from each other in the vertical direction.

As long as the effects of the present invention are obtained, the light source device 1 or the display device 7 may include components not disclosed in embodiment 9.

Embodiment 10

Fig. 129 is a plan view of the lighting device according to the present invention. The illustrated illumination device is configured as a backlight device disposed behind a liquid crystal display panel, for uniformly irradiating the entire surface of the liquid crystal display panel with light, has a rectangular planar shape corresponding to the liquid crystal display panel as an irradiated object, and includes a backlight chassis 1(B6) formed in a shallow box shape, and a plurality of LEDs (light emitting diodes) 2 and 2 … … (B1) as light sources are disposed in a vertical and horizontal manner on the entire surface of a bottom plate 10(B61) inside the backlight chassis 1.

As shown in fig. 129, a plurality of LEDs 2 and 2 … … (B1) (5 or 8 LEDs in the figure) are mounted on the LED boards 20 and 20 … … (B3). The LED board 20(B3) has a rectangular shape with a small width and a long length, and the LEDs 2 and 2 … … are mounted at equal intervals in the longitudinal direction on the widthwise center portion of one surface of the LED board 20.

As shown in fig. 129, for example, the arrangement of the LEDs 2, 2 … … on the chassis 10 of the backlight chassis 1 is such that an LED board 20 on which five LEDs 2, 2 … … are mounted and an LED board 20 on which eight LEDs 2, 2 … … are mounted are arranged in the longitudinal direction, and are arranged in a plurality of rows (nine rows in the figure) at equal intervals. The number of the LED boards 20 and 20 … … and the arrangement of the LED boards on the chassis 10 are not limited to those shown in the drawings, and may be set as appropriate according to the size and shape of the backlight chassis 1. The number of LEDs 2, 2 … … mounted on each LED board 20 is not limited to five or eight as shown, and may be set to an appropriate number.

Fig. 130 is a plan view of the backlight chassis 1, showing a state before the LED substrates 20 and 20 … … are mounted. As shown in the drawing, a plurality of fixing holes 11 and 11 … … (B64), positioning holes 12 and 12 … … (B67), and component mounting holes 13 and 13 … … (B66) are formed in the bottom plate 10 of the backlight chassis 1 so as to penetrate through the front and back thereof.

The fixing holes 11 and 11 … … (B64) are holes for fixing the LED boards 20 and 20 … …, and nine rows of fixing holes are arranged at equal intervals in the width direction of the bottom plate 10, with four fixing holes arranged in the longitudinal direction of the bottom plate 10 as a set, corresponding to the arrangement of the LED boards 20 and 20 … … shown in fig. 129. In fig. 130, the positions of the LED boards 20 and 20 … … are indicated by two-dot chain lines. The four fixing holes 11 and 11 … … in each row are located at the center in the width direction of the two LED boards 20 and 20 in the same row, and are located near both ends of the LED boards 20 and 20 … …, respectively.

When the backlight chassis 1 is manufactured by press molding, the positioning holes 12 and 12 … … (B67) are engaged with projections provided on a molding die to position the raw material plate with respect to the die, and thus the positioning holes 12 and 12 … … (B67) are provided. In the figure, three positioning holes 12, … … are formed in the surface of the base plate 10. In order to position the positioning holes in the plane of the mold, three or more positioning holes 12 and 12 … … are formed, and it is desirable that the forming positions thereof be uniformly set in the plane of the base plate 10 as shown in the drawing.

Component mounting holes 13, 13 … … (B66) are provided for mounting components of the cooling fan, the power supply circuit, various connection cables, and the like, the backlight device, and the liquid crystal display device using the backlight device, and these component mounting holes 13, 13 … … penetrate through the bottoms of recesses 14, 14 … … formed by recessing corresponding positions on the chassis 10 toward the back surface side, respectively. The number and arrangement of the component mounting holes 13, 13 … … can be set as appropriate according to the number and positions of constituent components to be mounted. In the figure, four component mounting holes 13 and 13 … … are randomly arranged in the surface of the base plate 10.

In the lighting device according to the present invention, as described above, the positioning holes 12 and 12 … … and the component mounting holes 13 and 13 … … are provided on a straight line connecting the two fixing holes 11 and 11 provided for the LED boards 20, and are positioned between the fixing holes 11 and 11.

Fig. 131 is a perspective view showing an external appearance of the LED substrate 20. Fig. 132 is a cross-sectional view taken along line XII-XII in fig. 129 showing an enlarged view of the portion where the LED substrate 20 is mounted, and fig. 133 is a cross-sectional view taken along line XIII-XIII in fig. 129.

As shown in these figures, the LEDs 2, 2 … … mounted on the LED board 20 are covered by the light diffusing lenses 3, 3 … … (B2) mounted on the LED board 20, respectively. The lens 3 has a circular planar shape as shown in fig. 131, and is a convex lens having a cross-sectional shape in which one surface is flat and the other surface is curved in a convex shape as shown in fig. 132 and 133. A recess 30(B21) is provided in the center of the flat one surface of the lens 3, and a plurality of support legs 31 and 31 … … (B22) are integrally provided around the recess 30 in a protruding manner. As shown in fig. 132 and 133, in the lens 3 having such a configuration, the flat surface is made to face downward, the LED2 is housed in the central recess 30 to be positioned, and the three support legs 31 and 31 … … are bonded to the LED board 20, respectively, so that the lens 3 is fixed and supported at a position separated from the surface of the LED board 20 by an appropriate length.

As shown in fig. 131, terminal portions 22 and 23 for external connection (B31 and B32) are provided at both ends of the LED board 20. Further, through holes 21, 21(B33, B34) that penetrate the center position in the width direction in the front and back are provided in the vicinity of both ends of the LED board 20, specifically, between the LEDs 2, 2 at both ends and the LEDs 2, 2 adjacent thereto. These through holes 21, 21 correspond to the positions of the fixing holes 11, 11 formed in the chassis 10 of the backlight chassis 1 as described above. The LED boards 20 and 20 … … are placed on the chassis 10 so that the through holes 21 and 21 are aligned with the fixing holes 11 and 11, and as shown in fig. 129, the LED boards 20 and 20 … … are fixed to the backlight chassis 1 by inserting the board holder 6(B7) into the matching portions of the through holes 21 and the fixing holes 11.

As shown in fig. 132, the substrate holder 6(B7) includes a fixing claw 61 protruding from one surface of the pressing plate 60 having a disc shape, and the LED substrate 20 is sandwiched and fixed between the pressing plate 60 and the supporting plate 1 by passing the fixing claw 61 through the through hole 21 of the LED substrate 20 and the fixing hole 11 of the base plate 10 and engaging with the periphery of the rear surface side of the fixing hole 11. The sandwiching is performed through the reflection sheet 5 provided to cover the entire surface of the base plate 10. The reflective sheet 5(B5) is a resin sheet such as polycarbonate having excellent light reflectivity. The upper surface of the LED substrate 20 is also covered with a reflection sheet 5, and the lens 3(B2) covering the mounting position of the LED2 is exposed to the surface of the reflection sheet 5 through each through-hole 51(B53) formed at the corresponding position of the reflection sheet 5. In fig. 129, the reflecting sheet 5 is not shown.

In addition, the substrate holder 6 includes a supporting protrusion 62(B83) vertically provided on the other surface of the pressing plate 60. As described later, the support projection 62 is provided to support the diffuser plate facing the chassis 10 of the backlight chassis 1 from the back surface. Instead of the structure in which all the substrate holders 6 have the supporting projections 62, a structure in which a part of the substrate holders 6 have the supporting projections 62 may be adopted.

As shown in fig. 129, the two LED boards 20 and 20 arranged continuously in the longitudinal direction on the chassis 10 of the backlight chassis 1 are connected to each other by connecting the terminal portions 22 and 22 located at the opposite positions with a connector 4 (B4). The terminal portions 23 and 23 at the other ends are used for connection to an external power supply, and the LEDs 2 and 2 … … mounted on the LED boards 20 and 20 … … emit light by power supplied from the external power supply. The light emission of the LEDs 2 and 2 … … is uniformly dispersed in the plane of the bottom plate 10 of the backlight chassis 1 by the effect of the diffusion by the lenses 3 and 3 … … multiplied by the reflection sheet 5, and is irradiated to the irradiation target disposed to face the bottom plate 10.

In the lighting device according to the present invention, the bottom plate 10 of the backlight chassis 1 has positioning holes 12 and 12 … … (B67) and component mounting holes 13 and 13 … … (B66) that penetrate the bottom plate 10 in the front-back direction. These positioning holes 12, 12 … … and component mounting holes 13, 13 … … have the positional relationship described above with respect to the fixing holes 11, 11 … … for fixing the LED substrate 20, and these positioning holes 12, 12 … … and component mounting holes 13, 13 … … are in a state of being blocked by the LED substrates 20, 20 … … mounted to these fixing holes 11, 11 … … as described above. The component mounting holes 13 and 13 … … are provided inside the recesses 14 and 14 … … provided by recessing the bottom plate 10, but the LED boards 20 and 20 … … block all of the recesses 14 and 14 … ….

Therefore, in the use state, dust is unlikely to enter the inside of the backlight chassis 1 through the positioning holes 12 and 12 … … and the component mounting holes 13 and 13 … …, and optical problems such as insufficient illuminance of the irradiation light, which may be caused by uneven irradiation light due to adhesion and accumulation of the dust on the surfaces of the LEDs 2 and 2 … …, the lenses 3 and 3 … …, and the surface of the reflection sheet 5, can be prevented. In addition, it is also possible to prevent the driving circuits of the LEDs 2 and 2 … … formed on the LED boards 20 and 20 … … from being electrically broken down due to adhesion of conductive dust to the surfaces of the LED boards 20 and 20 … ….

Further, the light emitted from the LEDs 2 and 2 … … does not leak to the outside through the positioning holes 12 and 12 … … and the component mounting holes 13 and 13 … … blocked by the LED boards 20 and 20 … …, and the possibility of giving an uncomfortable feeling to a user who sees the leaked light can be eliminated.

When the backlight chassis 1 is designed, the positioning holes 12 and 12 … … and the component mounting holes 13 and 13 … … are appropriately positioned with respect to the fixing holes 11 and 11 … … of the LED substrates 20 and 20 … …, so that the positioning holes 12 and 12 … … and the component mounting holes 13 and 13 … … can be sealed by the LED substrates 20 and 20 … ….

As shown in embodiment 10, when a rectangular LED substrate 20(B3) is used and the LED substrate 20 is fixed to the chassis 10 by the fixing holes 11, 11 near both ends, the positioning hole 12 and the component mounting hole 13 are formed on a straight line connecting the fixing holes 11, 11 and positioned between the fixing holes 11, and the positioning hole 12 and the component mounting hole 13 can be reliably sealed. The LED substrate 20 has appropriate elasticity, and the LED substrate 20 can be brought into good close contact with the base plate 10 and reliably sealed by only fixing the vicinities of both ends by the substrate holder 6, and the positioning holes 12 and 12 … … and the component mounting holes 13 and 13 … … can be reliably sealed. In addition to positioning holes 12 and 12 … … and component mounting holes 13 and 13 … … being arranged on a straight line connecting two fixing holes 11 and 11 so as to be positioned between these fixing holes 11 and 11, they may be arranged at positions offset in the width direction of LED substrate 20 from the straight line connecting two fixing holes 11 and 11, as long as they can be closed by LED substrate 20.

The recess 14 around the component mounting hole 13 is provided to secure a space on the rear surface side of the LED substrate 20 that closes the component mounting hole 13, and to allow components to be mounted in the component mounting hole 13 by locking, clamping, or the like. The through holes closed by the LED boards 20 and 20 … … are not limited to the positioning holes 12 and 12 … … and the component mounting holes 13 and 13 … …, and may be holes formed for other purposes.

In addition, the shape of the LED boards 20 and 20 … … is not limited to a rectangle, and may be an appropriate shape such as a rectangle, a square, or a circle, and in this case, the positions of the positioning holes 12 and 12 … … and the component mounting holes 13 and 13 … … may be appropriately set with respect to the fixing positions of the LED boards 20 and 20 … … in the design stage of the backlight chassis 1, thereby achieving reliable sealing. However, since the LED boards 20 and 20 … … are formed in a rectangular shape, a plurality of LED boards 20 and 20 … … having a narrow width can be arranged in a plurality of rows in a spaced apart manner, the total area of the LED boards 20 and 20 … … can be reduced, the cost of the LED boards 20 and 20 … … can be reduced, and the cost of the lighting apparatus can be reduced, and the positioning holes 12 and 12 … … and the component mounting holes 13 and 13 … … can be closed by the LED boards 20 and 20 … … regardless of whether or not the LED boards are arranged in a spaced apart manner.

Fig. 134 is a cross-sectional view of a liquid crystal display device according to the present invention including the illumination device having the above-described configuration as a backlight device. The liquid crystal display device includes a liquid crystal display panel 8(a1) as an image display section. In the liquid crystal display panel 8, a plurality of optical sheets 81 and 81 … … (diffusion plate, reflective polarizing plate, prism sheet, diffusion sheet, and the like) (C) are laminated, and the peripheral edge portions of these optical sheets are integrally held by a front holding frame 82(a2) and a rear holding frame 83(A3), thereby constituting a liquid crystal module.

As described above, the LED substrates 20 and 20 … … (B3) are arranged side by side in the backlight chassis 1(B6) formed by erecting the frame portion 15(B62) on the periphery of the bottom plate 10(B61), and the upper portions of these LED substrates are covered with the reflective sheet 5, thereby forming the backlight device (B), and the periphery of the frame portion 15 is fixed to the rear surface of the rear holding frame 83, so that the LEDs 2 and 2 … … arranged on the bottom plate 10 are attached and opposed to the rear surface of the liquid crystal display panel 8 as an irradiation object via the optical sheets 81 and 81 … ….

The substrate holder 6 sandwiches and fixes the LED substrates 20, 20 … … and the reflective sheet 5 between itself and the chassis base 10, the substrate holder 6 including the supporting projections 62. As shown in the drawing, the front ends of the supporting protrusions 62 abut against the optical sheet 81 to restrict the bending of the optical sheet 81 and appropriately maintain the interval between the optical sheet 81 and the LEDs 2, 2 … … on the chassis 10.

The liquid crystal display device adopts the following structure: that is, the liquid crystal module and the backlight device are fixed to the front surface case 80a via the front holding frame 82 and the rear holding frame 83, the front holding frame 82 and the rear holding frame 83 sandwich the periphery of the liquid crystal module and the backlight device, and the rear surface of the front surface case 80a is covered with the rear surface case 80 b. In the liquid crystal display device having such a configuration, light emitted from the LEDs 2 and 2 … … arranged on the chassis 10 of the backlight chassis 1 is uniformly irradiated onto the entire surface of the liquid crystal module disposed to face the chassis 10, and a desired image is displayed on the display surface of the liquid crystal display panel 8 exposed to the front surface opening of the front surface case 80a through the optical sheets 81 and 81 … … and the liquid crystal display panel 8.

It is to be noted that the liquid crystal display device described above is one application example of the illumination device according to the present invention, and it is needless to say that the illumination device according to the present invention can be applied to various applications in which it is necessary to uniformly irradiate light on the entire surface of a planar irradiation target.

In the above embodiment, the box-shaped base 1 in which the bottom plate 10 and the frame portion 15 are integrated is used, but the base 1 may be flat. Fig. 135 is a cross-sectional view showing another embodiment of the liquid crystal display device according to the present invention. The illustrated liquid crystal display device includes a flat plate-like chassis 1.

A frame 16 is fixed to the peripheral portion of the chassis 1, and the frame 16 is erected on one surface (the surface on which the LED boards 20 and 20 … … are arranged side by side). The frame 16 shown in the figure is fixed by the rivet 17, but the fixation may be achieved by an appropriate method such as bolt fixation or adhesion. In the chassis 1 having such a configuration, the LEDs 2, 2 … … arranged on the one surface are mounted so as to face the back surface of the liquid crystal display panel 8 as the irradiation object via the optical sheets 81, 81 … … by fixing the periphery of the frame 16 to the back surface of the rear holding frame 83.

The other configurations and operations of the liquid crystal display device shown in fig. 135 are the same as those of the liquid crystal display device shown in fig. 134, and the corresponding components are denoted by the same reference numerals as those of fig. 134, and the configurations and operations will not be described.

Embodiment 11

The present invention will be described in detail below with reference to the drawings showing a display device according to an embodiment.

Fig. 136 is a sectional view showing a part of the structure of a display device including a backlight device according to the present invention, fig. 137 is a sectional view showing a part of the structure of the backlight device according to the present invention in an enlarged manner, fig. 138 is a sectional view showing a structure of a rivet of the backlight device according to the present invention, fig. 139 is a plan view showing a part of the backlight device according to the present invention omitted, fig. 140 is a schematic perspective view showing a part of the backlight device according to the present invention in an exploded manner, and fig. 141A and 141B are plan views showing a part of the structure of a reflection sheet of the backlight device according to the present invention in an enlarged manner.

As shown in fig. 136, the display device includes: a display unit 10(a) having a substantially rectangular parallelepiped front side and having a display surface for displaying an image; a light source device a (b) disposed at the rear side of the display unit 10; and a housing 11(D) that covers the periphery of the display section 10 and the rear side of the light source device a, the housing 11 (D). The housing 11 houses a plurality of circuit boards (not shown) (B10) such as a power supply circuit board for supplying power to the display unit 10, a terminal circuit board for processing an image displayed on the display unit 10, and a control circuit board for controlling the display unit 10, and drives an LED1(B1) and a display panel 12(a1) described later based on outputs from these circuit boards.

The display unit 10(a) includes a display panel 12(a1) having a display surface, and an optical sheet 13(C) disposed behind the display panel 12. The peripheral portion of the display panel 12 is sandwiched forward and backward by the front holding frame 14(a2) and the rear holding frame 15(A3) to constitute a panel assembly. The rear holding frame 15 is attached to the peripheral portion of the support member 7 (B6).

The optical sheet 13(C) is a laminate in which a thick diffusion plate that uniformly diffuses light emitted from the light emitting elements, i.e., the LEDs 1, serving as the light source, and a thin resin sheet including a reflective polarizing plate, a prism sheet, a diffusion sheet, and the like are laminated.

The support member 7(B6) has a plate portion 71(B61) and a frame portion 72(B62) connected to the periphery of the plate portion 71, and supports the peripheral edge portion of the diffusion plate on the frame portion 72.

The backlight device a (b) according to the present invention includes: a plurality of LEDs 1(B1), the plurality of LEDs 1(B1) being arranged in a matrix as a light source; a plurality of LED boards 2(B3) on which the LEDs 1 are mounted on one surface 2a of the LED boards 2(B3) and which are arranged in parallel in two longitudinal and transverse directions; a plurality of connectors 3(B4), the plurality of connectors 3(B4) connecting the adjacent LED substrates 2, 2 to each other; a support pin 4(B8) for supporting the optical sheet 13, the support pin 4 (B8); a plurality of lenses 5(B2), the plurality of lenses 5(B2) being mounted on the one surface 2a of the LED board 2 so as to face the top of the LED1 and dispersing light emitted from the LED 1; a reflection sheet 6(B5) that faces the one surface 2a of the LED substrate 2, the reflection sheet 6(B5) reflecting light emitted from the lens 5; a support member 7(B6) for supporting the LED board 2, the support member 7 (B6); and a plurality of rivets 8(B7) for fixing the reflection sheet 6 to the support member 7 by the plurality of rivets 8(B7) to prevent the reflection sheet 6 from floating.

The LED board 2(B3) has a rectangular shape having a circuit portion on one surface 2a, and the LED boards 2(B3) are arranged in a plurality of rows in the longitudinal and transverse directions on one surface of the substantially rectangular support member 7. As shown in the drawing, a plurality of LEDs 1 are mounted on one surface 2a of each LED substrate 2 so as to be adjacent to each other in the longitudinal direction, and connection portions 21 and 22(B31 and B32) having terminals are provided at both ends in the longitudinal direction of the one surface 2 a.

As shown in fig. 139, for example, 5 or 6 LEDs 1(B1) are mounted separately in the longitudinal direction of the LED substrate 2, and 5 or 6 lenses 5 corresponding to the LEDs 1 are mounted on the one surface 2a with an adhesive.

In the LED substrates 2(B3) arranged side by side, the adjacent two connection portions 21, 21(B31, B32) of one row of the LED substrates 2 in the longitudinal direction are connected to each other by the connector 3(B4), the connection portion 22 of one LED substrate 2 is connected to the power supply circuit substrate by the second connector (B41), and the connection portion 22 of the other LED substrate 2 is connected to the short-circuit connector. A support pin insertion hole 23(B36) is opened in a portion of the LED substrate 2 corresponding to the support pin 4, and a rivet insertion hole 24(B36) is opened in a portion corresponding to the rivet 8.

The connector 3(B4) is substantially rectangular, and has terminals corresponding to the connection portions 21, 21 provided at both longitudinal ends of one surface thereof, and when connected to the connection portions 21, the connector 3(B4) overlaps the one surface 2a of the LED board 2.

The lens 5(B2) includes a light-transmitting portion 51(B21) and three positioning protrusions 52(B22), the light-transmitting portion 51(B21) is opposed to and separated from the top of the LED1, and has a hemispherical concave portion for diffusing the light emitted from the LED1 in the circumferential direction, the positioning protrusions 52(B22) protrude from the surface of the light-transmitting portion 51 facing the one surface 2a toward the LED substrate 2, the light-transmitting portion 51 is positioned with respect to the LED substrate 2, and the tips of the positioning protrusions 52 are attached to the one surface 2a with an adhesive.

The positioning projection 52 is provided so that the distance between the light transmitting portion 51 and the LED substrate 2 is slightly longer than the thickness of the reflection sheet 6, thereby absorbing the thermal expansion of the reflection sheet 6.

The reflection sheet 6(B5) is formed of a single synthetic resin sheet having high reflectivity and a substantially rectangular shape corresponding to the support member 7, and has through holes 61(B53) at positions corresponding to the lenses 5, through holes 62 at positions corresponding to the connectors 3, first through holes as support pin holes 63(B55) at positions corresponding to the support pins 4, and second through holes as rivet holes 64(B55) at positions corresponding to the rivets 8. Further, the support pin hole 63 has a larger diameter than the support pin insertion hole 23, and the rivet hole 64 has a larger diameter than the rivet insertion hole 24. As shown in fig. 141, a small hole 65(B55a) is provided as a mark for identification in the peripheral portion of the support pin hole 63.

The through holes 61 are arranged in a matrix shape in a circular shape having a diameter slightly larger than the light transmission portion 51(B21) of the lens 5. The light transmitting portion 51 of the lens 5 is disposed in the through hole 61. The through hole 62 is substantially rectangular, and the connector 3 is fitted therein. The support pin hole 63 has a circular shape larger than the mounting portion 43 of the support pin 4 and smaller than the brim portion 42, through which the mounting portion 43 is inserted, and the rivet hole 64 has a circular shape larger than the elastic portion 82b of the rivet 8 and smaller than the head portion 81a, through which the elastic portion 82b is inserted.

The support member 7(B6) is formed by molding a metal plate, and includes a plate portion 71(B61) having a substantially rectangular flat plate shape and a frame portion 72(B62) connected to the periphery of the plate portion 71, and accommodates and supports the LED substrate 2 in a row in the longitudinal direction and the width direction on one surface of the plate portion 71.

A plurality of through holes 73(B65) are opened in the support member 7 at positions corresponding to the support pin insertion holes 23. The diameter of the through hole 74 is substantially the same as the diameter of the rivet insertion hole 24.

The support pin 4(B8) includes: a pillar portion 41(B83) which protrudes from the LED substrate 2 toward the one surface 2a, and whose tip end contacts the optical sheet 13 to restrict bending of the optical sheet 13 (B83); a brim 42 extending outward in the horizontal direction from the peripheral side of the base end of the cylindrical portion 41; and a mounting portion (foot) 43, which mounting portion (foot) 43 protrudes from the brim 42 in the direction opposite to the columnar portion 41, and is inserted into the support pin insertion hole 23 and the through hole 73.

The cylindrical portion 41 is substantially conical and is integrally formed with the brim portion 42. The attachment portion 43 includes a columnar coupling portion 43a facing in a direction opposite to the columnar portion 41 from the brim portion 42, and two claw portions 43b connected to the tip end of the coupling portion 43a and clamped to the hole edge portion of the through hole 74. The mounting portion 43 is inserted into the insertion hole 23, and the support pin 4 is mounted on the LED substrate 2 and the support member 7. The support pin 4 is opposed to the optical sheet 13 at a position opposed to the optical sheet 13 by a distance only to the extent that the tip of the columnar portion 41 is in contact with one surface of the optical sheet 13, thereby restricting the bending of the optical sheet 13 to ensure uniform distance between the optical sheet 13 and the LED substrate 2.

When the support pins 4 are attached to the LED board 2 and the support member 7, the outer peripheral portion of the brim 42 extends to the small hole 65 outside the support pin hole 63 provided in the reflective sheet 6. The eaves 42 do not contact the reflective sheet 6, and a slight gap is provided therebetween. Thus, when the support pin 4 is attached, the small hole 65 formed outside the support pin hole 63 is not visible.

As shown in fig. 138, the support member 7 has a plurality of through holes 74(B65) formed at positions corresponding to the rivet insertion holes 24. The diameter of the through hole 74 is substantially equal to the diameter of the rivet insertion hole 24.

The rivet 8(B7) is formed of, for example, a metal or carbon material, and is inserted into the rivet insertion hole 24 and the through hole 74. The LED substrate 2 is fixed to the support member 7 by the rivet 8. The rivet 8 includes a receiving rivet 82(B71), and an inserting rivet 81 (B72).

The receiving rivet 82(B71) includes an annular locking portion 82a (B71a) having a diameter slightly larger than the diameter of the rivet insertion hole 24, and an outer peripheral portion of the locking portion 82a is located outside the rivet insertion hole 24 and inside the rivet hole 64 formed in the reflection sheet 6, and is locked to an edge portion of the rivet insertion hole 24. A plurality of elastic portions 82b are provided in parallel in the circumferential direction on the inner peripheral portion of the locking portion 82 a. The elastic portion 82b protrudes in the axial direction of the locking portion 82a, and is inserted through the rivet insertion hole 24 and the through hole 74. The axial dimension of the elastic portion 82b is larger than the axial dimensions of the rivet insertion hole 84 and the through hole 74, and the projecting end portion of the elastic portion 82b projects from the through hole 74 in the axial direction. An abutting portion 82c that protrudes radially inward of the locking portion 82a is provided integrally with the elastic portion 82b at the protruding end portion of the elastic portion 82b, and a gap is provided between the abutting portions 82c, 82 c.

The contact portion 82c is in contact with a leg portion 81b described later on the inner side, and the elastic portion 82b is bent outward by the contact of the leg portion 81b, so that the elastic portion 82b is in contact with the edge portion of the through hole 74. Therefore, the LED substrate 2 and the support member 7 are sandwiched between the locking portion 82a and the elastic portion 82b in the front-rear direction.

The insertion rivet 81(B72) has a head 81a (B72a) having a larger diameter than the insertion hole 11B, and a cylindrical leg 81B perpendicular to the head 81a is provided at the center of the head 81 a. A tapered portion 81ba is formed at the tip of the leg portion 81b, and the diameter of the leg portion 81b is gradually reduced toward the tip. The diameter of the leg 81b near the head 81a is substantially the same as the inner diameter of the locking portion 82a, and is larger than the dimension between the abutting portions 82c when the leg 81b is not inserted. Further, an edge portion of the head portion 81a protrudes toward the leg portion 81b, and a protruding width of the edge portion of the head portion 81a is smaller than an axial dimension of the engaging portion 82 a. The diameter of the head 81a is smaller than the diameter of the brim 42 of the support pin 4.

The leg 81b of the insertion rivet 81 is inserted into the engagement portion 82a, and the tip of the leg 81b is inserted into the gap between the abutting portions 82 c. A tapered portion 81ba is formed at the tip of the leg portion 81b, and the gap is widened by inserting the leg portion 81 b. The elastic portion 82b is bent outward and abuts against the edge portion of the through hole 74. The support member 7 and the LED substrate 2 are sandwiched by the elastic portion 82b and the locking portion 82a with an appropriate pressure, and the LED substrate 2 is brought into close contact with the support member 7.

The head 81a is in contact with the locking portion 82a and does not contact the reflection sheet 6. Between the edge portion of the head portion 81a protruding to the leg portion 81b side and the reflection sheet 6, a slight gap is provided. The reflective sheet 6 is held by the edge portion of the head portion 81 a. This prevents the reflecting sheet 6 from being lifted up from the LED substrate 2.

In the backlight device having the above-described configuration, the plurality of LEDs 1 are mounted on the one surface 2a with the open side facing upward, with the support member 7 placed on the console, the LED boards 2 on which the lenses 5 facing the tops of the LEDs 1 are mounted are arranged on the one surface of the plate portion 72 of the support member 7, the LED boards 2 are moved toward each other in the lateral direction and separated from each other in the longitudinal direction, and the LED boards 2 adjacent in the lateral direction are connected to each other by the connector 3. Then, the reflecting sheet 6 is placed on the one surface 2a of each LED substrate 2 so as to face each other.

At this time, the light-transmitting portion 51 of the lens 5 passes through each through-hole 61 of the reflection sheet 6, and the connector 3 passes through each through-hole 62. Further, the support pin holes 63 of the reflective sheet 6, the support pin insertion holes 23 of the LED substrate 2, and the through holes 73 of the support member 7 are positionally aligned, and the rivet holes 64 of the reflective sheet 6, the rivet insertion holes 24 of the LED substrate 2, and the through holes 74 of the support member 7 are positionally aligned.

After the reflection sheet 6 is incorporated, the support pins 4 and the rivets 8 are attached. Specifically, the mounting portion 43 of the support pin 4 is fitted into and clamped to the support pin insertion hole 23 of the LED substrate 2 and the through hole 73 of the support member 7 through the support pin hole 63 of the reflection sheet 6, thereby fixing the support pin 4 to the support member 7. After the receiving rivet 82 of the rivet 8 is inserted into the rivet insertion hole 24 of the LED substrate 2 and the through hole 74 of the support member 7 through the rivet hole 64 of the reflection sheet 6, the leg portion 81b of the insertion rivet 81 is inserted into the locking portion 82a of the receiving rivet 82, and the tip portion of the leg portion 81b is inserted into the gap between the abutting portions 82c, whereby the rivet 8 is fixed to the support member 7.

As shown in fig. 140, the difference in the outer dimensions between the support pin hole 63 and the rivet hole 64 is small, and is difficult to visually recognize and distinguish from each other, but the identification mark is formed around the support pin hole 63 by the small hole 65, so that the support pin 4 and the rivet 8 can be visually recognized without any error in attachment.

As shown in fig. 141A, in the backlight device according to the present invention, the diameter of the head 81A of the rivet 8 is smaller than the diameter of the brim 42 of the support pin 4. The identification small hole 65 formed around the support pin hole 63 is provided at a position not covered by the rivet 8 but covered by the support pin 4. The small hole 65 is provided so that when the support pin 4 is inserted into the support pin hole 63, the small hole 65 is hidden by the brim 42 of the support pin 4, and when the rivet 8 is inserted into the support pin hole 63, at least a part of the small hole 65 is visible. Thus, when the rivet 8 is erroneously mounted to the support pin hole 63, the small hole 65 is visible, so that the error can be immediately recognized, and the support pin 4 can be reliably mounted. Conversely, if the support pins 4 are erroneously attached to the rivet holes 64, the number of the support pins 4 increases, and therefore the optical sheet 13 can be more reliably supported, and the reflection sheet can be held.

In the backlight device according to embodiment 11, the identification mark is formed by the pinhole 65(B55 a). The support pin holes 63 may be formed simultaneously with the formation of the small holes 65 in the reflection sheet 6. Therefore, the identification mark can be reliably added without requiring a special process or number of steps for adding the identification mark. The identification mark is not limited to the small hole 65 formed in the reflection sheet 6, and may be visually distinguished from the support pin hole 63 and the rivet hole 64 when the support pin 4 and the rivet 8 are attached.

In the backlight device according to embodiment 11, the support pins 4 are inserted into the support pin holes 63 and fixed to the LED substrate 2 and the support member 7, and the rivets 8 are inserted into the rivet holes 64 and fixed to the LED substrate 2 and the support member 7, but the invention is not limited thereto. For example, the support pins 4 and the rivets 8 may be fixed only to the LED substrate 2. Further, the reflecting sheet 6 may be provided with a support pin hole 63 and a rivet hole 64 at a portion where the LED substrate 2 is not formed, and the support pin 4 and the rivet 8 may be inserted into the support pin hole 63 and the rivet hole 64, respectively, and fixed to the support member 7.

In addition, in the backlight device according to embodiment 11, the description has been given of the case where the small holes 65 for identification are provided in the reflection sheet 6 to prevent the rivet 8 from being erroneously attached, but in addition to this, the following configuration may be adopted: that is, the resist around the rivet hole 64 into which the rivet 8 is inserted is removed from the resist covering the one surface 2a of the LED substrate 2 to expose the substrate base. In this configuration, since the substrate base around the hole can be hidden when the rivet 8 is inserted into the rivet hole 64 and can be seen when the rivet 8 is not inserted into the rivet hole 64, it can be easily found that the mounting rivet 8 has been forgotten.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the embodiments, and various modifications can be made within the scope of the gist of the present invention.

Embodiment mode 12-1

Next, a display device according to embodiment 12-1 will be described in detail based on the drawings shown. Fig. 142 is a longitudinal sectional view schematically showing the display device.

In the figure, reference numeral 1 denotes a rectangular display panel having liquid crystal, and the display panel 1(a1) has the following structure: that is, the voltage applied to the liquid crystal is controlled to adjust the transmittance of light, thereby displaying a video. The peripheral portion of the display panel 1 is held between the front holding frame 2(a2) and the rear holding frame 3(A3), and is housed in the front case 4(D1) having a rectangular frame shape. The front housing 4 is disposed around the front holding frame 2 and the rear holding frame 3. The front case 4 has a rectangular opening having a size corresponding to that of the display panel 1. A plurality of optical sheets 5(C) are provided on the rear side of the display panel 1, and the plurality of optical sheets 5(C) focus Light of an LED (Light Emitting Diode) 9, which is a Light source to be described later, toward the display panel 1.

A diffusion plate 6 is provided on the rear side of the optical sheet 5, and the diffusion plate 6 uniformly diffuses the light from the LEDs 9. The diffusion plate 6 is supported by an edge portion of a support plate 7 formed in a deep disk shape by metal. A plurality of LED boards 8(B3) are arranged side by side on the front surface of the support plate 7(B6), and a film-like heat dissipation pattern 8a made of a heat conductive material, for example, metal is formed on the rear surface of the LED board 8.

A plurality of LEDs 9, 9, … …, and 9(B1) are mounted on the front surface of the LED board 8(B3), and lenses 10, … …, and 10(B2) for diffusing light are disposed on the front sides of the LEDs 9, 9, … …, and 9, respectively. Three protrusions 10a, and 10a (B22) protruding toward the LED substrate 8 are provided in parallel in the circumferential direction on the peripheral portion of the lens 10, and the tip of the protrusion 10a is firmly bonded to the front surface of the LED substrate 8 with an adhesive.

Support bases (not shown) for supporting the deep-dish-shaped reflection sheet 11(B5) are provided on the left and right sides of the support plate 7, respectively. A plurality of holes 11a into which the lenses 10 are inserted are opened in the bottom surface of the reflection sheet 11 (B53). Each lens 10 protrudes to the front side through the hole 11 a.

The rear side of the support plate 7 is provided with a deep-disc-shaped rear housing 12 (D2). The longitudinal and transverse dimensions of the rear housing 12 are substantially the same as those of the front housing 4, and the edge portion of the rear housing 12 and the edge portion of the front housing 4 are opposed to each other. The front case 4 and the rear case 12 are fixed to the rear case 12 by providing, at edge portions of the front case 4 and the rear case 12, engaging convex portions and engaging concave portions, not shown, respectively, and engaging the engaging concave portions with the engaging convex portions.

Fig. 143 is a schematic rear view of the support plate 7 viewed from the rear side, and fig. 144 is a perspective view schematically showing through holes formed in the vicinity of the edge of the support plate.

The support plate 7(B6) has a pyramid part 7a (protruding part) near its edge, which is formed by extruding and drawing a part of the support plate 7 to protrude rearward. A rectangular through hole 7c (B61a) penetrating in the front-rear direction is opened in the top surface portion 7B of the pyramid part 7a, and two notches (engagement recesses) 7d, 7d (B61B) are formed at each edge portion of the through hole 7c in the longitudinal direction with an appropriate length therebetween. The size between the notches 7d, 7d formed in one edge portion is different from the size between the notches 7d, 7d formed in the other edge portion. A fastening hole 7e (B61c) is opened in the top surface portion 7B outside one end edge of the through hole 7c in the longitudinal direction. The later-described fastening projection 41(B91d) is fastened to the fastening hole 7 e.

As shown in fig. 143, a power supply circuit board 20 (B10 a) for supplying power to the display panel 1, the LED board 8, and the like, a control circuit board 21(B10B) for driving and controlling the display panel 1, and a signal processing circuit board 22(B10c) for processing video signals displayed on the display surface of the display panel 1 are provided on the rear surface of the support plate 7. A plurality of linear conductors 25(B40) are connected to the power circuit board 20, and the conductors 25 are inserted through the through holes 7c and connected to the LED board 8. Between the power circuit board 20 and the through-hole 7c, a plurality of conductors 25 are bundled by a band 26. Further, the conductor 25 is covered with an insulator.

The protective tube 30 for protecting the edge portion of the conductor 25 separated from the through hole 7c is fitted into the through hole 7c (B91). The axial dimension of the protection cylinder 30 is short, and the cross section of the protection cylinder 30 perpendicular to the axial direction is rectangular corresponding to the through hole 7 c. The cover 50 is attached to the protective tube 30 (B92). The protective tube 30 is formed with a recess 30B (B91a) described later, and when the cover 50 is attached to the protective tube 30, the conductor 25 is inserted between the recess 30B and the cover 50.

Fig. 145 is a plan view schematically showing the protective sleeve 30 fitted in the through hole 7c, fig. 146 is a schematic sectional view taken along line VII-VII in fig. 145, fig. 147 is a schematic sectional view taken along line VIII-VIII in fig. 145, and fig. 148 is a schematic sectional view taken along line IX-IX in fig. 145.

As shown in fig. 146 and 147, on one side in the longitudinal direction, both side surfaces of the protection cylinder 30 in the longitudinal direction are narrower in width in the axial direction of the protection cylinder 30 having a prism shape, the width of the middle portion is gradually widened toward one end in the axial direction (downward in fig. 146 and 147), and the width is wider toward the other end.

As shown in fig. 145, one end portion in the longitudinal direction of the protection tube 30 is open, and a connecting plate 30a connected to both side surfaces of the protection tube 30 in the longitudinal direction is provided at the one end portion. The connecting plate 30a is relatively flat, and as shown in fig. 145 and 148, the connecting plate 30a and the both side surfaces form a recess 30B (B91 a). An inclined plate 30c is provided at an edge portion of the recess 30b on the side opposite to the one end portion, and the inclined plate 30c is connected to an intermediate portion where the axial width of the protection cylinder 30 gradually expands. Between the inclined plate 30c and the other end portion in the longitudinal direction of the protection tube 30, a reinforcing plate 30d having a narrow width perpendicular to the axial direction of the protection tube 30 projects from the inner peripheral surface of the protection tube 30 by an appropriate length. The protection cylinder 30 has a notch 30e formed in a reinforcing plate 30d connected to the other end in the longitudinal direction of the protection cylinder 30.

The dimensions of the protective tube 30(B91) in the longitudinal direction and the width direction are slightly shorter than the rectangular through hole 7c, and the protective tube 30(B91) is fitted into the through hole 7 c. As shown in fig. 146 and 147, the portion of the protective tube 30 fitted into the through hole 7c, which portion has a gradually expanding axial width, and the portion having a wider width are located between one surface (the lower surface in fig. 146 and 147) of the top surface portion 7b of the pyramid part 7a and the front surface of the support plate 7.

As shown in fig. 146, two positioning plates 31, 31 (positioning portions) are provided side by side in the longitudinal direction on one side surface of the protective tube 30 in the longitudinal direction, and the two positioning plates 31, 31 (positioning portions) protrude from the one side surface and are parallel to the radial direction of the through hole 7 c. The positioning portions 31 and 31 are located on the other surface side (upper side in fig. 146) of the top surface portion 7 b. Further, two plate-like engaging pieces (engaging convex portions) 32, 32(B91B) are provided side by side in the longitudinal direction on one side surface of the protective tube 30 in the longitudinal direction, and the two engaging pieces (engaging convex portions) 32, 32(B91B) are parallel to the radial direction of the through hole 7 c. The engaging pieces 32, 32 are arranged alternately with the positioning plates 31, 31 in the longitudinal direction, and are positioned on one surface side (lower side in fig. 146) of the top surface portion 7b of the pyramid part 7 a. The dimension between the positioning plates 31, 31 and the engaging pieces 32, 32 is slightly longer than the thickness dimension of the top surface portion 7b of the pyramid part 7 a.

Further, a claw portion 33 projecting outward is provided on the one side surface of the protective tube 30, and the claw portion 33 is located on the other surface side of the top surface portion 7b at an appropriate distance from the positioning plates 31, 31 in the longitudinal direction. Further, at a corner portion of the one side surface of the protective tube 30 located on the other surface side of the top surface portion 7B at the one end portion side in the longitudinal direction, an L-shaped abutting portion 34(B91c) is provided as viewed from the side and projecting outward along the corner portion. The contact portion 34 contacts a bent portion 55(B92a) described later.

On the other hand, as shown in fig. 147, two positioning plates 35, 35 are provided side by side in the longitudinal direction on the other side surface of the protective tube 30 in the longitudinal direction, and these two positioning plates 35, 35 are parallel to the radial direction of the through hole 7 c. The positioning portions 35, 35 are located on the other surface side (upper side in fig. 147) of the top surface portion 7 b. Further, two plate-like engaging pieces 36, 36(B91B) are provided side by side in the longitudinal direction on the other side surface of the protective tube 30 in the longitudinal direction, and these two engaging pieces 32, 32(B91B) are parallel to the radial direction of the through hole 7 c. The engaging pieces 36, 36 are arranged alternately with the positioning plates 35, 35 in the longitudinal direction, and are positioned on one surface side (lower side in fig. 147) of the top surface portion 7b of the pyramid part 7 a. The engaging pieces 36, 36 and the engaging pieces 32, 32 provided on the one side surface of the protective tube 30 in the longitudinal direction are disposed at positions that are not symmetrical in the width direction of the protective tube 30. The dimension between the engaging pieces 36, 36 is longer than the dimension between the engaging pieces 32, 32. When the cover 50 is attached to the protective tube 30, the positions of the engagement pieces 32, 32 and the engagement pieces 36, 36 correspond to the four notches 7 d.

Further, on the other side surface of the protective tube 30, a claw portion 37 projecting outward is provided, and the claw portion 37 is located on the other surface side (upper side in fig. 147) of the top surface portion 7b at an appropriate distance from the positioning plates 35, 35 in the longitudinal direction. The claw portions 37 and the claw portions 33 provided on the one side surface of the protective cylinder 30 in the longitudinal direction are arranged at symmetrical positions in the width direction of the protective cylinder 30. The dimension between the positioning plates 35, 35 and the engaging pieces 36, 36 is slightly longer than the thickness dimension of the top surface portion 7b of the pyramid part 7 a. Further, at a corner portion of the other side surface of the protection tube 30 located on the other surface side of the top surface portion 7B at the one end portion side in the longitudinal direction, an L-shaped abutting portion 38(B91c) is provided as viewed from the side and projecting outward along the corner portion. The contact portion 38 contacts a curved portion 55(B92a) described later.

As shown in fig. 146 and 147, the coupling plate 30a is provided with a locking portion 39 that protrudes from the coupling plate 30a toward one end in the axial direction. The engaging portion 39 is engaged with the edge portion of the through hole 7c in the width direction. A tongue-shaped projecting portion 40 projecting in the longitudinal direction is provided on the outer side surface of the other end portion in the longitudinal direction of the protective tube 30. The extension portion 40 is positioned on one surface side of the top surface portion 7B, and a fastening projection 41(B91d) projecting to one surface side of the other surface is provided at an extension end portion of the extension portion 40 so as to correspond to the fastening hole 7e (B61 c). The protection tube 30 is positioned in the radial direction of the through hole 7c by clamping the clamping protrusion 41 to the clamping hole 7e formed in the top surface portion 7 b.

At both corners of the other end in the longitudinal direction of the protective tube 30, positioning plates (positioning portions) 42, 42 are provided which extend from the side surface in the longitudinal direction and the side surface in the width direction. The positioning plates 42 and 42 are positioned on one surface side of the top surface portion 7b, perpendicular to the penetrating direction of the through hole 7 c. The positioning plates 42, 42 are located at substantially the same positions as the above-described positioning plates 31, 35 in the penetrating direction. Therefore, the positioning plates 31, 35, 42 and the engaging pieces 32, 36 are disposed on both sides of the top surface of the pyramid part 7a, and the protective tube 30 is positioned in the penetrating direction of the through hole 7 c.

In addition, the engagement pieces 32 and 36 are disposed at positions corresponding to the notches 7d, and the protective tube 30 is fitted into the through hole 7c, and in this case, the engagement pieces 32 and 36 are engaged with the notches 7d, so that the engagement pieces 32 and 36 are positioned on one surface side of the top surface portion 7 b. Then, with the positioning plates 31, 35, and 42 in contact with the top surface portion 7b, the protective tube 30 is slid toward the other end portion side in the longitudinal direction, the chucking projections 41 are chucked to the chucking holes 7e, and the positioning plates 31, 35, and 42 and the engaging pieces 32 and 36 are disposed on both surfaces of the top surface portion 7b, respectively. At this time, as shown in fig. 146 and 147, the positioning plates 31, 35, and 42 are in contact with the top surface portion 7b, and the portion of the protective tube 30 fitted in the through hole 7c, in which the axial width is gradually widened, and the portion of the wide width are located on the rear side of the front surface of the support plate 7.

The lid 50 is disposed in a portion of the protection cylinder 30 protruding toward the other surface of the top surface portion 7 b. Fig. 149 is a plan view schematically showing the lid 50, fig. 150 is a schematic side view when viewed from the direction F1 shown in fig. 149, fig. 151 is a schematic side view when viewed from the direction F2 shown in fig. 149, fig. 152 is a schematic cross-sectional view taken along the line XI-XI shown in fig. 149, and fig. 153 is a schematic side view when viewed from the direction F3 shown in fig. 149.

The cover 50(B92) includes a rectangular closed plate 51 placed on the protective tube 30, side surface portions 52, 52 that extend from one end portion in the longitudinal direction across an intermediate portion and are connected to the edge portion of the closed plate 51, and a side surface portion 53 that is connected to the edge portion of the closed plate 51 in the width direction. As shown in fig. 149, notches 54, 54 are formed at both corner portions of one end portion in the longitudinal direction of the closed plate portion 51. The notches 54 and 54 are provided with bent portions 55 and 55(B92a), and the bent portions 55 and 55(B92a) are connected to the side surface portions 52 and 52, bent in an L shape, and recessed on the notch 54 side. The bent portion 55 protrudes toward one end in the longitudinal direction of the closed plate portion 51, and a space is formed by the bent portion 55 and the notch 54. As shown in fig. 153, an elastic member 70 that protrudes toward the bent portion 55 side and extends in the width direction is provided between the notches 54 and 54 in the closed plate portion 51.

The other end portion in the longitudinal direction of the closed plate portion 51 is slightly narrower than the intermediate portion. Hook-shaped engaging portions 56, 56(B91e) are provided at the edge portions in the longitudinal direction at the other end portions in the longitudinal direction of the closing plate portion 51, and the engaging portions 56, 56(B91e) protrude in the same direction as the elastic member 70 (see fig. 151). As shown in fig. 150 and 152, locking holes 56a and 56a are opened in portions of the locking portions 56 and 56 on the side of the closed plate portion 51.

Next, the mounting of the lid 50 to the protection tube 30 will be described. Fig. 154 and 155 are explanatory views for explaining the attachment of the cover 50 to the protective tube 30. Note that in fig. 154, the description of the conductor 25 is omitted.

As shown in fig. 154, when the cover 50 is attached to the protective tube 30, the plurality of conductors 25 are first inserted into the protective tube 30 and arranged in the recess 30 b. Next, as shown in fig. 154, the lid 50 is set in an inclined posture with respect to the top surface portion 7b, and the abutting portions 34 and 38 are inserted into the space formed by the curved portion 55 and the notch 54, so that the abutting portions 34 and 38 are brought into contact with the inner corner portions of the curved portions 55 and 55. Then, the cover 50 is brought close to the protective tube 30 with the contact portions 34 and 38 as fulcrums, and the engagement portions 56 and 56 are brought into contact with the claw portions 33 and 37 to be elastically deformed. Then, the lid 50 is brought closer to the protection tube 30, and the claw portions 33 and 37 are locked in the locking holes 56a and 56 a. At this time, as shown in fig. 155, the conductor 25 is sandwiched between the elastic member 70 and the coupling plate 30a in the recess 30 b. The connecting plate 30a is flat, and the plurality of conductors 25 are regularly and closely arranged in the recess 30 b.

In the display device according to embodiment 12-1, since the plurality of conductors 25 inserted through the through-holes 7c are disposed in the concave portion 30b, when the protective cylinder 30 is closed with the lid portion 50, the plurality of conductors 25 are held in the concave portion 30b, whereby the conductors 25 can be collected in the concave portion 30b in a short time, and dust can be prevented from entering from the through-holes 7 c.

Further, since the conductor 25 is sandwiched between the elastic member 70 and the connecting plate 30a, the conductor 25 is closely gathered by the elastic force of the elastic member 70, and the gap in the concave portion 30b is filled, the conductor 25 can be gathered in the concave portion 30b in a short time, and the entry of dust from the through hole 7c can be reliably prevented.

In addition, since the conductors 25 can be easily and regularly arranged in the recess 30b by the flat connecting plate 30a, and the conductors can be easily and closely collected, the conductors 25 can be reliably bundled in the recess 30 b.

As described above, the dimension between the notches 7d and 7d formed in one edge portion is different from the dimension between the notches 7d and 7d formed in the other edge portion, and the dimension between the engaging pieces 36 and 36 is longer than the dimension between the engaging pieces 32 and 32 according to the different dimension. Therefore, only when the protection tube 30 is disposed in the through hole 7c in a predetermined direction, the engagement pieces 32 and 36 formed on the outer peripheral portion of the protection tube 30 can be engaged with the notch 7d formed on the edge portion of the through hole 7 c. This prevents the operator from mistakenly recognizing the orientation of the protective tube 30 when assembling the display device, and the protective tube 30 is fitted into the through hole 7c, thereby enabling the display device to be assembled quickly and reliably.

Further, since the positioning plates 31, 35, 42 are in contact with the top surface portion 7b by fitting the protective cylinder 30 into the through hole 7c provided in the pyramid part 7a, and the portion of the protective cylinder 30 fitted into the through hole 7c, in which the axial width is gradually widened, and the portion having the wider width are located on the rear side of the front surface of the support plate 7, the protective cylinder 30 does not come into contact with a component provided on the front surface side of the support plate 7, and the assembly of the display device is not hindered by fitting the protective cylinder 30 into the through hole 7 c.

Further, since the retaining hole 7e and the retaining projection 41 are provided in the support plate 7 and the protective cylinder 30 to position the protective cylinder 30 in the radial direction of the through hole 7c, the protective cylinder 30 can be reliably attached to the through hole 7 c.

Further, since the protective cylinder 30 is positioned by the positioning plates 31, 35, 42 in the penetrating direction of the through hole 7c, the protective cylinder 30 can be reliably fixed to the through hole 7 c.

Further, when the cover 50 is attached to the protective tube 30, the abutting portions 34 and 38 are brought into abutment with the inner corners of the curved portions 55 and 55, and the cover 50 is rotated toward the protective tube 30 with the abutting portions 34 and 38 as fulcrums, so that the operator can easily attach the cover 50 to the protective tube 30, and the display device can be efficiently manufactured in a short time.

Further, since the lid 50 is fixed to the protection tube 30 by locking the claw portions 33, 37 to the locking holes 56a, the attached lid 50 can be prevented from coming off the protection tube 30.

Further, since the support plate 7 is not formed into a complicated shape, for example, a groove shape, for inserting the conductor 25 without being damaged, the support plate 7 can be manufactured in a short time. In addition, the protective tube 30 can prevent the conductor 25 from being damaged by the edge of the through hole 7 c.

In the display device according to embodiment 12-1, the notch 7d is formed in the through hole 7c, and the engagement pieces 32 and 36 are provided in the protective tube 30, but the engagement piece may be provided in the through hole 7c, and the engagement recess 30b into which the engagement piece engages may be provided on the outer periphery of the protective tube 30. Further, the protruding portion 40 is provided with the locking projection, and the top surface portion 7b is provided with the locking hole 7e, but the top surface portion 7b may be provided with the locking projection, and the protruding portion 40 may be provided with the locking hole 7 e. Further, although only the concave portion 30b is formed in the protective tube 30, the concave portion 30b may be formed in the lid 50, or the concave portions 30b facing each other may be formed in two components of the lid 50 and the protective tube 30.

Further, the display device according to embodiment 12-1 uses the LED9 as a light source, but a fluorescent tube may be used as a light source. In this case, the fluorescent tube is attached to the support plate 7 via the tube holder. Further, the following structure may be adopted: that is, a panel which emits light by itself, for example, an organic EL panel is used as a display panel without using a light source such as an LED or a fluorescent tube, and a control signal is input to the display panel from the signal processing circuit 21.

Embodiment mode 12-2

Next, a display device according to embodiment 12-2 will be described in detail based on the drawings shown. Fig. 156 and 157 are explanatory views explaining mounting of the cover 50 to the protective tube 30 of the display device, and fig. 158 is an enlarged perspective view schematically showing the vicinity of the engagement axis. Note that in fig. 156, the description of the conductor 25 is omitted.

As shown in fig. 156, two claw portions 80, 80 are provided on both side surfaces of the protection cylinder 30 in the longitudinal direction, and the claw portions 80, 80 are positioned on the other surface side of the top surface portion 7 b. Side surface portions 58 formed so as to extend from the other end portion to the intermediate portion are provided on both edge portions of the closing plate portion 51 in the longitudinal direction, and two locking holes 58a, 58a corresponding to the claw portions 80, 80 are opened in the side surface portions 58. The other end of the closing plate portion 51 is a thin elastic plate portion 51a, and contact shafts (contact portions) 51b, 51b protruding in the width direction are provided at both corners of the elastic plate portion 51 a. On one end side of the protective tube 30, L-shaped bent portions 45, 45 are provided which extend outward in the longitudinal direction from both side surfaces of the protective tube 30.

When the cover 50 is attached to the protective tube 30, the plurality of conductors 25 are first inserted through the protective tube 30 and disposed in the recess 30 b. Next, as shown in fig. 156, the lid 50 is inclined with respect to the top surface portion 7b, and as shown in fig. 158, the contact shaft 51b is brought into contact with the inner corner portions of the curved portions 45, 45. Then, the cover 50 is brought close to the protective tube 30 with the contact portion 51b as a fulcrum, and the side surface portion 58 is brought into contact with the claw portions 80, 80 to be elastically deformed. The lid 50 is brought closer to the protection tube 30, and the claw portions 80, 80 are locked in the locking holes 58a, 58 a. At this time, as shown in fig. 157, the conductor 25 is sandwiched between the elastic plate portion 51a and the connecting plate 30a in the recess 30 b. The connecting plate 30a is flat, and the plurality of conductors 25 are regularly and densely arranged in the recess 30 b. Further, the elastic plate portion 51a may be provided with an elastic member 70, and the conductor 25 may be sandwiched between the elastic member 70 and the connecting plate 30 a.

In the configuration of the display device according to embodiment 12-2, the same components as those in embodiment 12-1 are denoted by the same reference numerals, and detailed description thereof is omitted.

Description of the reference symbols

(embodiment mode 1-1 to embodiment mode 1-5)

1 luminous diode (light source)

2 light-emitting diode base plate (Circuit base plate)

5 reflective sheet

51 flat part

51a corner

52 frame part

52a corner

53(53a, 53b) second fold line

53c bent part

54 cut-out

55 double-sided tape (Combined component)

56 eave part

57 cut-out

58 cuts

6 support shell

70 display part

A light source device

(embodiment mode 2-1 to embodiment mode 2-6)

1 luminous diode (light source)

2 light-emitting diode base plate (Circuit base plate)

21 connecting part

3 connector

5 reflective sheet

52 incision

52a long side

52b short side

54 second incision

54a long side

54b short side

55 third cut

55a long side

55b short side

56 cut

56a long side

56b short side

57 fourth incision

57a long side

57b short side

50. 58, 59 cuts

70 display part

A light source device

(embodiment mode 3-1 to embodiment mode 3-2)

1 display panel

6 diffusion plate

7 support plate

7a through hole

7b, 8b locating hole

8 LED substrate (base plate)

8a substrate hole

9 LED (luminous element)

11 reflective sheet

11a sheet hole

11b, 11c, 11d are inserted into the through holes

20 rivet

21. 31, 41 inserting rivet

21a, 31a, 41a head

21b, 31b, 41b foot

22 receiving rivet

22a locking part

22b elastic part

22c contact part

30 location rivet

31c positioning part

40 support rivet

41c support part

(embodiment mode 4)

1 luminous diode (luminous element)

2 light-emitting diode base plate (Circuit base plate)

2A LED substrate (Circuit substrate)

2a one side

2b another side

2c insertion hole

2d insertion hole

2e1 through hole

2e2 through hole

2e3 through hole

2e4 through hole

2e5 through hole

2e6 through hole

4 reflection sheet (reflection component)

4A reflection sheet (reflection component)

43 third through hole (opening)

6 support body

61a through hole

8 rivet (fittings)

81 barrel component

81a flange part

82 shaft member

82a head

70 display part

72a display surface

A light source device

(embodiment mode 5-1 and embodiment mode 5-2)

1 display panel

7 support plate

7a second through hole (through hole)

8 base plate

8a first through hole (through hole)

9 luminous diode (luminous element)

10 lens

11 reflective sheet

11a sheet hole

11b hole

11c insertion hole

20 rivet (fixed component)

21 insert rivet

21a head

21b foot part

22 receiving rivet

30 screw

30a head

30b shaft part (foot)

31 gasket

(embodiment mode 6-1 to embodiment mode 6-4)

A display part

B light source unit

3 luminous diode (light source)

4 light-emitting diode base plate (Circuit base plate)

7 light reflection sheet

71 Flat part

74 through hole

75. 78 Long hole

76 second hole

8 support body

84 first position setting hole

85 second position setting hole

9 first shaft (first position setting part)

91b setting shaft part

9b screw part (setting shaft part)

10 second shaft body (second position setting part)

10c eave part (setting shaft part)

10g Medium diameter shaft part (setting shaft part)

(embodiment 7)

1 luminous diode (luminous element)

2 light-emitting diode base plate (Circuit base plate)

2a one side

2b another side

2c, 2d into the hole

21 connecting part

5 connector

51 plug (connector part)

51a Metal fitting

52 socket (connector part)

52a needle electrode

6 support body

61a through hole

8 rivet (fittings)

81 barrel component

81a flange part

82 shaft member

82a head

70 display part

72a display surface

A light source device

(embodiment mode 8)

1 luminous diode (luminous element)

2 light-emitting diode base plate (Circuit base plate)

2a one side

2b another side

2c, 2d through hole

3 lens

31b opposite surface

6 support body

61a through hole

8 rivet

81 barrel component (shaft part)

81a flange part

82 shaft member (shaft portion)

82a head

82b, 82c, 82d grooves (recesses)

70 display part

72a display surface

A light source device

(embodiment mode 9)

1 light source device

2 Circuit Board

21 first connection part

22 second connection part

23 light emitting part

31. 32, 33 marks

51. 52, 53 mark

6 mounting member

7 display device

7a display surface

70 display part

(embodiment mode 10)

1 backlight source base (base)

2 LED (solid luminous element)

3 lens

8 liquid crystal display panel

10 base plate

11 fixed hole

12 location hole (through hole)

13 parts mounting hole (through hole)

14 recess

20 LED substrate

(embodiment mode 11)

A backlight source device

1 LED (luminous element)

2 LED substrate

4 support pin

41 cylindrical part

42 eaves

43 mounting part

6 reflective sheet

63 support pin hole (first through hole)

64 rivet hole (second through hole)

65 pore

7 support member

8 rivet

81a head

81b foot

13 optical sheet

(embodiment mode 12-1 and embodiment mode 12-2)

1 display panel

9 LED (light source)

7 support plate

7a pyramid part (projection)

7c through hole

7d notch (concave fastening)

7e clamping hole

20 power supply substrate

21 Signal processing substrate (Circuit Board)

22 control substrate

25 conductor

30 protective cylinder

30b recess

31. 42 locating plate (locating plate)

32 engaging piece (engaging convex part)

33. 80 claw part

34. 38 abutting portion

41 clamping projection

45. 55 bending part

50 cover part

51b contact shaft (contact part)

56a, 58a locking hole

70 elastic member

Claims (26)

1. A light source device comprising:

a circuit board on which a light emitting section is mounted and which has a first connection section and a second connection section that are separately provided for supplying power to the light emitting section; and

a mounting member on which the circuit board is mounted,

it is characterized in that the preparation method is characterized in that,

the circuit board is provided with a concave or convex mark indicating the direction of the mounting position of the mounting member.

2. The light source device according to claim 1,

the mark is in a concave shape, and the mark is provided with a concave shape,

a convex mark is formed on a portion of the mounting member opposite to the mark.

3. A light source device comprising:

a circuit board on which a light emitting portion, and a first connecting portion and a second connecting portion that are separately arranged are mounted; and

a mounting member on which the circuit board is mounted,

it is characterized in that the preparation method is characterized in that,

the circuit board has a concave or convex mark formed thereon, the mark indicating an orientation in a direction in which the first and second connection portions of the circuit board are separated from each other.

4. The light source device according to claim 3,

the circuit board is provided with a notch-shaped portion or a hole penetrating from one surface of the circuit board to the opposite surface of the one surface as the mark,

The mounting member is formed with a convex mark that engages with the mark.

5. The light source device according to claim 4,

the marks are respectively formed on one side and the other side of the circuit substrate in the separation direction, at least one of the number, the size and the shape of the marks on the two sides is different,

the logo has a number, size, and shape corresponding to the mark to be engaged.

6. The light source device according to any one of claims 1 to 5,

the outer edge shape of the circuit substrate at one end in the separation direction is made different from the outer edge shape of the circuit substrate at the other end, thereby forming the mark.

7. A display device, comprising:

a display unit having a display surface on one side; and

the light source device according to any one of claims 1 to 6, which is disposed on the other side of the display portion.

8. A lighting device in which an element substrate on which a plurality of solid-state light-emitting elements are mounted is mounted in parallel on a base, and light emitted from each solid-state light-emitting element is irradiated onto an object to be irradiated which is disposed so as to face the base,

The base comprises a through hole which is penetrated in the front and the back,

the element substrate is mounted at a position where the through hole is closed.

9. The illumination device of claim 8,

the through hole is a positioning hole for positioning the base with respect to a molding die of the base.

10. The illumination device of claim 8,

the through hole is a component mounting hole formed in a recess provided in a part of the base, and the element substrate is mounted at a position closing the entire recess.

11. A lighting device as recited in any one of claims 8-10,

and mounting the element substrate so that the element substrate is in close contact with the base near a position where the through hole is closed.

12. A lighting device as recited in any one of claims 8-11,

the element substrate has a rectangular shape in which a plurality of solid state light emitting elements are mounted side by side in a longitudinal direction, and the through hole is formed between fixing holes provided in the chassis for fixing the vicinity of both end portions of the element substrate.

13. A liquid crystal display device in which a backlight device is disposed behind a liquid crystal display panel for displaying an image, and the liquid crystal display panel modulates and transmits light emitted from the backlight device to display the image on the front surface of the liquid crystal display panel,

Use of the illumination device of any one of claims 8 to 12 as the backlight device.

14. A backlight device comprising: a substrate having a plurality of light-emitting elements mounted on one surface thereof; a support member that supports the other surface of the substrate; a reflective sheet that covers the one surface of the substrate and reflects light emitted from the light-emitting element; and an optical sheet which is opposed to the reflection sheet and diffuses light, characterized by comprising:

a first through hole and a second through hole provided on the reflecting sheet;

a support pin including a foot portion inserted through the first through hole and attached to at least one of the substrate and the support member, and a columnar portion protruding from the foot portion so as to protrude from the reflection sheet and supporting the optical sheet;

a rivet which includes a head portion larger than the second through hole and a leg portion extending from the head portion, is attached to at least one of the substrate and the support member by inserting the leg portion from one surface side of the substrate into the second through hole, and holds the reflection sheet by the head portion; and

And the identification part is arranged on the reflector plate and is positioned near the first through hole.

15. The backlight apparatus of claim 14,

the cylindrical portion of the support pin has a larger brim than the head,

the identification portion is provided such that the identification portion is hidden by the brim when the foot portion of the support pin is inserted into the first through hole, and at least a part of the identification portion is visible when the foot portion of the rivet is inserted into the first through hole.

16. The backlight apparatus of claim 14 or 15,

the identification part is a hole formed in the reflector plate.

17. A display device characterized by comprising the backlight device according to any one of claims 14 to 16.

18. A display device, comprising: a support plate having one surface side supporting a light source for irradiating light to the display panel; a circuit board disposed on the other surface side of the support plate, for driving the display panel or the light source; and a through-hole provided in the support plate and through which a conductor connected to the circuit board is inserted, the through-hole including:

A protective cylinder fitted in the through hole to protect the conductor;

a cover portion that faces the protection cylinder in a penetrating direction of the through hole and blocks the protection cylinder; and

a recess formed on a portion where the cover and the protection cylinder face each other.

19. The display device of claim 18,

the support plate includes a protrusion protruding to one side of the other face,

the through hole is provided in the protruding portion.

20. The display apparatus according to claim 18 or 19,

the inside of the recess has an elastic member opposing the bottom surface of the recess.

21. The display device according to any one of claims 18 to 20,

the bottom surface of the recess is flat.

22. The display device according to any one of claims 18 to 21, comprising:

an engaging concave portion (or an engaging convex portion) formed at an edge portion of the through hole; and

and an engaging convex portion (or an engaging concave portion) formed on an outer peripheral portion of the protective cylinder and engaging with the engaging concave portion (or the engaging convex portion) when the protective cylinder is disposed in the through hole in a predetermined direction.

23. The display device according to any one of claims 18 to 22, comprising:

a fastening hole (or a fastening protrusion) provided around the through hole; and

and the clamping protrusion (or the clamping hole) is arranged on the extending part extending outwards from the protective cylinder and clamped in the clamping hole (or the clamping protrusion).

24. The display device according to any one of claims 18 to 23, comprising:

and a positioning portion provided at an outer peripheral portion of the protection cylinder, the positioning portion positioning the protection cylinder in a penetrating direction of the through hole.

25. The display device according to any one of claims 18 to 24, comprising:

a bent portion provided on one of an edge portion of the cover portion and an outer peripheral portion of the protective cylinder; and

and an abutting portion provided on the other of the edge portion of the cover portion and the outer peripheral portion of the protection cylinder and abutting against the inside of the bent portion.

26. The display device according to any one of claims 18 to 25, comprising:

A claw portion (or a locking hole) provided at an edge portion of the lid portion; and

and a locking hole (or a claw portion) which is provided in an outer peripheral portion of the protection cylinder and locks the claw portion (or the locking hole).