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WO2013069598A1 - Dispositif d'éclairage, dispositif d'affichage et dispositif de réception de télévision - Google Patents

Dispositif d'éclairage, dispositif d'affichage et dispositif de réception de télévision Download PDF

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Publication number
WO2013069598A1
WO2013069598A1 PCT/JP2012/078593 JP2012078593W WO2013069598A1 WO 2013069598 A1 WO2013069598 A1 WO 2013069598A1 JP 2012078593 W JP2012078593 W JP 2012078593W WO 2013069598 A1 WO2013069598 A1 WO 2013069598A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
light source
plate
guide plate
incident surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2012/078593
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English (en)
Japanese (ja)
Inventor
寺島　健太郎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Publication of WO2013069598A1 publication Critical patent/WO2013069598A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0091—Positioning aspects of the light source relative to the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/003—Lens or lenticular sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package

Definitions

  • the present invention relates to a lighting device, a display device, and a television receiver.
  • the liquid crystal display device requires a backlight device as a separate illumination device because the liquid crystal panel used for this does not emit light.
  • a backlight device an edge light type backlight device in which a light incident surface is provided on a side surface of a light guide plate and a light source such as an LED is disposed on a side surface side of the light guide plate is known.
  • an uneven surface is provided on an end surface other than the light incident surface of the light guide plate housed in the chassis as a housing, and the uneven surface can be fitted to the uneven surface of the side plate of the chassis.
  • a configuration with irregularities is known.
  • the light guide plate can be positioned in the chassis by fitting the unevenness provided on the light guide plate side with the unevenness provided on the side plate of the chassis.
  • a gap is generated between the concaves and convexes fitted to each other, so that there is a problem that the light guide plate is shaken in the plate surface direction due to vibration or the like.
  • Patent Document 1 discloses a backlight device in which the light guide plate housed in the chassis is suppressed from shaking in the plate surface direction due to vibration or the like.
  • a rib is disposed between the light guide plate and the side plate of the chassis so as to have a spring property. For this reason, it can suppress that a light-guide plate shakes in the plate
  • An object of the technology disclosed in the present specification is to provide a technology capable of preventing a light-emitting surface of a light source from being damaged by a light guide plate.
  • the technology disclosed in this specification includes a light source, a light guide plate in which at least one side surface is a light incident surface, and the light incident surface is disposed to face the light source, the light source, and the light incident surface. And a translucent member that regulates a distance between the light incident surface and the light source and transmits light from the light source to the light incident surface side.
  • the light transmission member prevents light from being changed in the distance between the light guide plate and the light source while realizing a configuration in which light from the light source is guided to the light incident surface side by the light transmission member. Can do. For this reason, it can prevent that a light-guide plate rattles, and can prevent that the light-incidence surface of a light-guide plate and the light emission surface of a light source contact
  • the light incident surface may have a rectangular shape
  • the translucent member may have a cylindrical shape with the long side direction of the light incident surface as an axial direction. According to this configuration, the translucent member comes in contact with the light incident surface of the light guide plate and the light exit surface of the light source at one point of the cross section of the light transmissible member, so the translucent member is displaced in the plate surface direction of the light guide plate. By doing so, it is possible to reduce damage to the light exit surface of the light source.
  • the front end of the contact member on the light incident surface side may be positioned closer to the light incident surface than the light exit surface of the light source. According to this configuration, the cylindrical light-transmitting member is less likely to be disturbed by the light source when abutting the abutting member against the abutting member, so that the abutting member can be easily abutted.
  • the part of the contact member that contacts the light transmitting member may be an inclined surface that is inclined with respect to the plate surface of the light source substrate. According to this configuration, the cylindrical light-transmitting member can be easily brought into contact with the contact member.
  • the inclined surface may be inclined so as to form an angle of 45 ° with respect to the plate surface of the light source substrate. According to this configuration, the cylindrical translucent member can be more easily brought into contact with the contact member.
  • the translucent member may be formed of a glass material. According to this structure, the specific structure of the translucent member excellent in translucency and durability is realizable.
  • the contact member may be formed of a metal material. According to this structure, the specific structure of the contact member excellent in light reflectivity and durability is realizable.
  • the contact member may be formed by cutting. According to this configuration, the shape of the contact member can be easily designed.
  • the light guide plate further comprising: a bottom plate; and a side plate that rises from an edge of the bottom plate to one surface side of the bottom plate, and that accommodates at least the light guide plate, the light source, and the light transmissive member.
  • a convex portion that partially protrudes toward the other side is provided on any one of the side surface other than the light incident surface and the side plate of the housing member, and the convex portion is provided on the other side.
  • a concave portion that is opposed and partially recessed may be provided, and the convex portion and the concave portion may be fitted.
  • the technology disclosed in this specification can also be expressed as a display device including a display panel that performs display using light from the above-described lighting device.
  • a frame member that accommodates the light source, the light source substrate, the display panel, and the light guide plate is further provided between the chassis and the chassis opposite to the display panel side with respect to the light guide plate. It may be arranged on the side. According to this configuration, a display device that does not include a cabinet can be realized.
  • a display device in which the display panel is a liquid crystal panel using liquid crystal is also new and useful.
  • a television receiver provided with the above display device is also new and useful.
  • FIG. 1 is an exploded perspective view of a television receiver TV according to Embodiment 1.
  • FIG. An exploded perspective view of the liquid crystal display device 10 is shown.
  • the top view of the backlight apparatus 24 is shown.
  • a cross-sectional view of the liquid crystal display device 10 is shown.
  • the principal part sectional view of liquid crystal display 10 is shown.
  • FIG. 4 is a cross-sectional view of a main part of a liquid crystal display device 110 according to a second embodiment.
  • FIG. 5 is a cross-sectional view of a main part of a liquid crystal display device 210 according to Embodiment 3.
  • FIG. 1 is an exploded perspective view of the television receiver TV according to the first embodiment.
  • FIG. 2 is an exploded perspective view of the liquid crystal display unit LDU constituting the liquid crystal display device 10.
  • FIG. 3 is a plan view of the backlight device 24.
  • FIG. 4 is a cross-sectional view of the cross section along the short side direction of the liquid crystal display device 10.
  • a part of each drawing shows an X-axis, a Y-axis, and a Z-axis, and each axis direction is drawn in a common direction in each drawing.
  • the Y-axis direction coincides with the vertical direction
  • the X-axis direction coincides with the horizontal direction.
  • the vertical direction is used as a reference for upper and lower descriptions.
  • the television receiver TV includes a liquid crystal display unit LDU, various substrates PWB, MB, CTB attached to the back side (back side) of the liquid crystal display unit LDU, and main substrates PWB, MB, A cover member CV attached to cover the CTB and a stand ST are provided, and the display surface of the liquid crystal display unit LDU is held by the stand ST along the vertical direction (Y-axis direction).
  • the liquid crystal display device 10 according to the present embodiment is obtained by removing at least a configuration for receiving a television signal (such as a tuner portion of the main board MB) from the television receiver TV having the above-described configuration. As shown in FIG.
  • the liquid crystal display unit LDU has a horizontally long rectangular shape (rectangular shape, longitudinal shape) as a whole, and includes a liquid crystal panel 16 that is a display panel and a backlight device 24 that is an external light source. These are configured to be integrally held by the frame 14 and the chassis 22 which are appearance members constituting the appearance of the liquid crystal display device 10.
  • the chassis 22 according to the present embodiment constitutes a part of the appearance member and a part of the backlight device 24.
  • the various substrates PWB, MB, and CTB include a power supply substrate PWB, a main substrate MB, and a control substrate CTB.
  • the power supply substrate PWB can be said to be a power supply source of the liquid crystal display device 10 and can supply driving power to the other substrates MB and CTB, the LED light source 28 of the backlight device 12, and the like. . Therefore, it can be said that the power supply substrate PWB also serves as the “LED drive substrate for driving the LED light source 28”.
  • the main board MB has at least a tuner unit capable of receiving a television signal and an image processing unit (not shown) for processing the received television signal, and controls the processed image signal as follows. Output to the substrate CTB is possible.
  • the main board MB receives an image signal from the image reproduction device when the liquid crystal display device 10 is connected to an external image reproduction device (not shown). It can be processed and output to the control board CTB.
  • the control board CTB has a function of converting an image signal input from the main board into a liquid crystal driving signal and supplying the converted liquid crystal driving signal to the liquid crystal panel 16.
  • the liquid crystal display unit LDU that constitutes the liquid crystal display device 10 has its main components between the frame 14 that forms the front side appearance and the chassis 22 that forms the back side appearance. It is assumed that it is housed in a space.
  • the main components housed in the frame 14 and the chassis 22 include at least the liquid crystal panel 16, the optical member 18, the light guide plate 20, and the LED unit 32. Among these, the liquid crystal panel 16, the optical member 18, and the light guide plate 20 are held in a state of being sandwiched between the front frame 14 and the rear chassis 22 in a stacked state.
  • the backlight device 24 includes the optical member 18, the light guide plate 20, the LED unit 32, and the chassis 22, and is configured by removing the liquid crystal panel 16 and the frame 14 from the liquid crystal display unit LDU.
  • the LED unit 32 that constitutes the backlight device 24 is disposed in the frame 14 and the chassis 22 so as to face one side of the light guide plate 20 in the short side direction (Y-axis direction).
  • the LED unit 32 is arranged on the LED substrate 30, an LED light source 28 that is a light source, an LED substrate 30 on which the LED light source 28 is mounted, a heat sink (heat spreader, light source attachment member) 34 to which the LED substrate 30 is attached.
  • Contact members 32a and 32b, and a translucent member 36 disposed between the LED substrate 30 and the light incident surface 20a of the light guide plate 20. The configurations of the contact members 32a and 32b and the translucent member 36 will be described in detail later. Hereinafter, each component will be described.
  • the chassis 22 is made of a metal such as an aluminum material, for example, and has a bottom plate 22a having a rectangular shape in a plan view, side plates 22b and 22c rising from outer edges of both long sides of the bottom plate 22a, and both short sides of the bottom plate 22a. It is comprised from the side plates 22d and 22d which stand up from the outer edge.
  • the side plates 22d and 22d on both short sides of the chassis 22 are respectively provided with recesses 22t that open to the side facing the light guide plate 20 (inside the chassis 22).
  • a space facing the LED unit 32 and the one side plate 22 c in the chassis 22 is a housing space for the light guide plate 20.
  • the liquid crystal panel 11 has a horizontally long rectangular shape (rectangular shape, longitudinal shape) in a plan view, and a pair of glass substrates having excellent translucency are separated by a predetermined gap.
  • the liquid crystal is sealed between both substrates.
  • One substrate array substrate
  • a switching element for example, TFT
  • the other substrate CF substrate
  • a color filter or counter electrode in which colored portions such as R (red), G (green), and B (blue) are arranged in a predetermined arrangement, and an alignment film. ing.
  • the liquid crystal panel 16 is placed in a stacked manner on the front side of the optical member 18 described below, and the back side surface (the outer surface of the polarizing plate on the back side) is in close contact with the optical member 18 with almost no gap. . This prevents dust and the like from entering between the liquid crystal panel 16 and the optical member 18.
  • the display surface of the liquid crystal panel 16 includes a display area on the center side of the screen where an image can be displayed, and a non-display area having a frame shape (frame shape) surrounding the display area on the outer peripheral edge side of the screen. .
  • the liquid crystal panel 16 is connected to a control board CTB via a driver part for driving liquid crystal or a flexible board, and an image is displayed in a display area on the display surface 11a based on a signal input from the control board CTB. It has become so.
  • a polarizing plate is disposed on the outside of both substrates. Note that elastic members 15 having elasticity are respectively arranged on a part of the surface exposed to the liquid crystal panel 16 side of the frame 14 (see FIG. 4).
  • the optical member 18 is formed by laminating a diffusion sheet 18a, a lens sheet 18b, and a reflective polarizing plate 18c in order from the light guide plate 20 side.
  • the diffusion sheet 18a, the lens sheet 18b, and the reflective polarizing plate 18c have a function of converting light emitted from the LED unit 32 and passing through the light guide plate 20 into planar light.
  • a liquid crystal panel 16 is installed on the upper surface side of the reflective polarizing plate 18 d, and the optical member 18 is disposed between the light guide plate 20 and the liquid crystal panel 16.
  • the LED unit 32 has a configuration in which LED light sources 28 that emit white light are arranged in a row on a resin-made rectangular LED board 30.
  • the LED substrate 30 is disposed in a state where the surface opposite to the surface on which the LED light source 28 is disposed is in contact with the heat radiating plate 34.
  • the LED light source 28 may emit white light by applying a phosphor having a light emission peak in a yellow region to a blue light emitting element.
  • the blue light emitting element may emit white light by applying a phosphor having emission peaks in the green and red regions.
  • a phosphor having a light emission peak in a green region may be applied to a blue light emitting element, and white light may be emitted by combining a red light emitting element.
  • the LED light source 28 may emit white light by combining a blue light emitting element, a green light emitting element, and a red light emitting element. Further, a combination of an ultraviolet light emitting element and a phosphor may be used. In particular, an ultraviolet light-emitting element may emit white light by applying a phosphor having emission peaks in blue, green, and red, respectively.
  • the light guide plate 20 is a rectangular plate-like member, is formed of a highly transparent (highly transparent) resin such as acrylic, is in contact with the reflective sheet 26 and is supported by the chassis 22. Yes. As shown in FIGS. 2 and 3, the light guide plate 20 faces the light emitting surface 20b, which is the main plate surface, toward the diffusion sheet 18a so that one side faces the LED units 32, 32, and is opposite to the light emitting surface 20b.
  • the opposite plate surface 20c which is the plate surface on the side, is arranged so as to face the reflection sheet 26 side.
  • the light incident surface 20a has a rectangular shape in which the horizontal direction (X-axis direction) is the long side direction and the thickness direction (Z-axis direction) of the light guide plate 20 is the short side direction (see FIG.
  • the light generated from the LED unit 32 enters from the light incident surface 20 a of the light guide plate 20 and exits from the light exit surface 20 b facing the diffusion sheet 18 a,
  • the liquid crystal panel 16 is irradiated from the back side.
  • the light guide plate 20 and the optical member 18 are disposed directly below the liquid crystal panel 16 and the LED unit 32 that is a light source is disposed on the side end of the light guide plate 20.
  • the so-called edge light method (side light method) is adopted.
  • convex portions 20 s that partially protrude corresponding to the concave portions 22 t provided on the side plate 22 d in the short side direction of the chassis 22 are respectively provided. Is provided.
  • the convex portion 20s is formed in a size that can be fitted into a concave portion 22t provided in the side plate 22d of the chassis 22.
  • the light guide plate 20 is positioned with respect to the chassis 22 by fitting the concave portions 22t and the convex portions 20s.
  • the reflection sheet 26 has a rectangular shape, is made of synthetic resin, has a white surface with excellent light reflectivity, and is placed on the front side of the bottom plate 22 a of the chassis 22.
  • the reflection sheet 26 has a reflection surface on the front side, and this reflection surface is in contact with the opposite plate surface 20 c on the opposite side of the light output surface 20 a of the light guide plate 20.
  • the reflection sheet 26 can reflect light leaking from the LED unit 32 or the light guide plate 20.
  • the heat dissipating member 34 is a plate-like member having an L shape in cross section and having a heat dissipating property higher than that of the LED substrate 30.
  • the heat dissipating member 34 is arranged along the long side direction of the chassis 22. (See FIG. 5).
  • the bottom surface portion 34 a has a rectangular shape in plan view (see FIG. 2), extends from the side plate side 22 b of the chassis 22 to the end portion side of the light guide plate 20, and extends along the bottom plate 22 a of the chassis 22. It is arranged in contact with 22a. One end of the bottom surface portion 34 a is in contact with the side plate 22 b of the chassis 22.
  • the standing wall portion 34b has a plate shape from the edge of the bottom surface portion 34a on the side contacting the side plate 22b of the chassis 22 and rises perpendicularly to the bottom plate 22a of the chassis 22, and one surface (outer surface) is While contacting the side plate 22b of the chassis 22 and a part of the frame 14, the other surface (inner surface) is in contact with the plate surface of the LED substrate 30 opposite to the side where the LED light source 28 is disposed.
  • FIG. 5 is a cross-sectional view of a main part of the liquid crystal display device 10 and shows an enlarged cross-sectional view of the vicinity of the light transmitting member 36 in FIG.
  • the LED substrate 30 the surface facing the light incident surface 20a of the light guide plate 20
  • it is formed of a metal material such as aluminum.
  • a pair of abutting members 32a and 32b are arranged.
  • the pair of abutting members 32a and 32b are respectively disposed along the long side direction of the LED substrate 30 in the upper and lower portions of the LED substrate 30 in the cross-sectional view of FIG.
  • An inclined surface is provided on a part of the surface. These inclined surfaces are formed by cutting and are inclined so as to face the inside of the tips of the contact members 32a and 32b (center side in the thickness direction (Z-axis direction) of the light guide plate 20), and the plate of the LED substrate 30.
  • the angles A and B made with respect to the surface are each set to 45 °.
  • the front end surface of the LED substrate 30 is located closer to the light incident surface 20 a side of the light guide plate 20 than the light exit surface 28 a of the LED light source 28.
  • the translucent member 36 has a cylindrical shape whose axial direction is the long side direction of the light incident surface 20a (see FIG. 2), and the side surfaces thereof are the light exit surface 28a of the LED light source 28 and the light incident surface 20a of the light guide plate 20. And abutting surfaces of the abutting members 32a and 32b, respectively (the respective abutting locations are indicated by reference numerals 28a1, 20a1, 32a1 and 32b1 in FIG. 5). As shown in FIG.
  • the translucent member 36 is in point contact with each member in a cross-sectional view. Moreover, the translucent member 36 is in contact with each member so as to be pressed from the light incident surface 20a side toward the LED light source 28 side. For this reason, the light-transmitting member 36 is held between the light guide plate 20 and the LED light source 28 without bonding or the like between the members, and the light-emitting surface of the LED light source 28 is transmitted by the light-transmitting member 36. The distance between 28a and the light incident surface 20a of the light guide plate 20 is restricted. With such a translucent member 36, the light emitted from the LED light source 28 is transmitted through the translucent member 36 and reaches the light incident surface 20 a of the light guide plate 20. .
  • the light transmitting member 36 and the light guide plate 20 are realized while realizing the configuration in which the light from the LED light source 28 is guided to the light incident surface 20a side by the light transmitting member 36. It is possible to prevent the distance from the LED light source 28 from changing. For this reason, it can prevent that the light-guide plate 20 rattles, and can prevent that the light-incidence surface 20a of the light-guide plate 20 and the light emission surface 28a of the LED light source 28 contact
  • the light incident surface 20a of the light guide plate 20 has a rectangular shape.
  • the translucent member 36 has a cylindrical shape with the long side direction (X-axis direction) of the light incident surface 20a of the light guide plate 20 as the axial direction.
  • the light transmitting member 36 comes into contact with the light incident surface 20a of the light guide plate 20 and the light output surface 28a of the LED light source 28 at one point of the cross section of the light transmitting member 36. It is possible to reduce damage to the light exit surface 28a of the LED light source 28 by being displaced in the plate surface direction.
  • the backlight device 24 includes an LED substrate 30 having a light source disposed on a plate surface facing the light incident surface, and an LED light source 28 on the plate surface on which the LED light source 28 of the LED substrate 30 is disposed. Further provided are contact members 32 a and 32 b which are disposed in the portions not disposed, protrude toward the light incident surface 20 a, and contact the light transmitting member 36. In the backlight device 24, the contact members 32 a and 32 b are provided as described above, so that the columnar light transmitting member 36 can be easily disposed between the LED light source 28 and the light guide plate 20.
  • the tips of the contact members 32 a and 32 b on the light incident surface 20 a side of the light guide plate 20 are positioned closer to the light incident surface 20 a than the light exit surface 28 a of the LED light source 28. Yes. For this reason, when the column-shaped translucent member 36 is brought into contact with the contact members 32a and 32b, the LED light source 28 is unlikely to be disturbed, so that it is easy to come into contact with the contact members 32a and 32b.
  • the inclined surfaces are inclined so that the portions of the contact members 32 a and 32 b that are in contact with the light transmitting member 36 form an angle of 45 ° with respect to the plate surface of the LED substrate 30. It is said that. For this reason, it becomes the structure which is easy to make the cylindrical translucent member 36 contact
  • the backlight device 24 further includes a heat radiating plate 34 that has heat radiating properties, and a part of which is in contact with the other plate surface of the LED substrate 30.
  • a heat radiating plate 34 that has heat radiating properties, and a part of which is in contact with the other plate surface of the LED substrate 30.
  • FIG. 6 is a cross-sectional view of a main part of the liquid crystal display device 110 according to the second embodiment.
  • the shape of the translucent member 136 is different from that of the first embodiment. Since the other configuration is the same as that of the first embodiment, the description of the structure, operation, and effect is omitted.
  • the part obtained by adding the numeral 100 to the reference numeral in FIG. 5 is the same as the part described in the first embodiment.
  • the translucent member 136 has an octagonal shape in sectional view, and has a prismatic shape with the long side direction of the light incident surface 120 a as the axial direction. As shown in FIG. 6, the translucent member 136 is in surface contact with each member in a sectional view. Even if the translucent member 136 has such a shape, the translucent member 36 can prevent the distance between the light guide plate 120 and the LED light source 128 from changing, so the light guide plate The light guide plate 120 can prevent the light output surface 128a of the LED light source 128 from being damaged or the like.
  • FIG. 7 is a cross-sectional view of a main part of the liquid crystal display device 210 according to the third embodiment.
  • the shape of the contact members 232a and 232b is different from that of the first embodiment. Since the other configuration is the same as that of the first embodiment, the description of the structure, operation, and effect is omitted.
  • a part obtained by adding the numeral 200 to the reference numeral in FIG. 5 is the same as the part described in the first embodiment.
  • the inclined surfaces provided on the front end surfaces of the contact members 232a and 232b are curved surfaces.
  • the curved surface follows the shape of the side surface of the light transmitting member 236 having a cylindrical shape.
  • the translucent member 236 is in surface contact with the contact members 232a and 232b in a sectional view. Even if the inclined surfaces of the contact members 232a and 232b have such a shape, the light transmitting member 36 can prevent the distance between the light guide plate 120 and the LED light source 228 from changing. Therefore, the light guide plate 120 can be prevented from rattling, and the light output surface 228a of the LED light source 228 can be prevented from being damaged by the light guide plate 220.
  • LED light sources 28, 128, 228, and 328 are examples of “light sources”.
  • the backlight devices 24, 124, 224, and 324 are examples of “illumination devices”.
  • the LED substrates 30, 130, and 230 are examples of “light source substrates”.
  • the liquid crystal display devices 10, 110, and 210 are examples of the “display device”.
  • the configuration in which the light-transmitting material is formed of a glass material is exemplified, but the light-transmitting material may be formed of another material.
  • a resin material such as acrylic may be used.
  • the configuration in which the contact member is formed of a metal material such as aluminum is exemplified.
  • the contact member may be formed of another material such as ceramic.
  • a metal material having high thermal conductivity is preferable.
  • the configuration in which the inclined surface of the contact member is formed by cutting is exemplified, but it may be processed by other methods. For example, die casting such as aluminum may be used.
  • the configuration in which the backlight device includes the heat radiating plate and the LED light source is arranged on the surface of the heat radiating plate is exemplified, but the configuration may be provided that does not include the heat radiating plate.
  • the LED board may be directly attached to the side plate of the chassis.
  • TV TV receiver
  • LDU liquid crystal display unit
  • PWB power supply substrate
  • MB main substrate
  • CTB control substrate
  • CV cover member
  • ST stand
  • 26, 126, 226 Reflective sheet
  • 28, 128, 228 LED light source, 30, 130, 230: LED substrate, 32a, 32b, 132a, 1323b, 232a, 232b: Abutting members, 34, 134, 234: heat sinks, 36, 136, 236: translucent members

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

L'invention porte sur un dispositif de rétroéclairage (24), lequel dispositif comprend : une source de lumière à diodes électroluminescentes (28) ; une plaque de guidage de lumière (20), dont un côté est une surface d'entrée de lumière (20a), disposé de telle sorte que la surface d'entrée de lumière (20a) fait face à la source de lumière à diodes électroluminescentes (28) ; et un élément de transmission de lumière (36), disposé entre la source de lumière à diodes électroluminescentes (28) et la surface d'entrée de lumière (20a), pour restreindre la distance entre la surface d'entrée de lumière (20a) et la source de lumière à diodes électroluminescentes (28), l'élément de transmission de lumière étant apte à transmettre de la lumière à partir de la source de lumière à diodes électroluminescentes (28) jusqu'à la surface d'entrée de lumière (20a). Comme l'élément de transmission de lumière (36) peut empêcher la plaque de guidage de lumière (20) de cliqueter, la surface d'entrée de lumière (20a) de la plaque de guidage de lumière (20) et la surface de sortie de lumière (28a) de la source de lumière à diodes électroluminescentes (28) peuvent être empêchées de venir en contact entre elles. En résultat, la surface de sortie de lumière (28a) de la source de lumière à diodes électroluminescentes (28) peut être empêchée d'être endommagée ou abimée d'une autre façon par la plaque de guidage de lumière (20).
PCT/JP2012/078593 2011-11-07 2012-11-05 Dispositif d'éclairage, dispositif d'affichage et dispositif de réception de télévision Ceased WO2013069598A1 (fr)

Applications Claiming Priority (2)

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JP2011-243465 2011-11-07
JP2011243465 2011-11-07

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006302566A (ja) * 2005-04-18 2006-11-02 Toshiba Matsushita Display Technology Co Ltd 面光源装置
JP2010002745A (ja) * 2008-06-20 2010-01-07 Hitachi Displays Ltd 液晶表示装置
JP2011108366A (ja) * 2009-11-12 2011-06-02 Nec Lcd Technologies Ltd 面発光装置
JP2011119272A (ja) * 2004-06-30 2011-06-16 Three M Innovative Properties Co ロングパス反射体を有する蛍光体による照明システムおよびその作製方法
JP2011198769A (ja) * 2011-06-15 2011-10-06 Mitsubishi Electric Corp 面状光源装置および表示装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011119272A (ja) * 2004-06-30 2011-06-16 Three M Innovative Properties Co ロングパス反射体を有する蛍光体による照明システムおよびその作製方法
JP2006302566A (ja) * 2005-04-18 2006-11-02 Toshiba Matsushita Display Technology Co Ltd 面光源装置
JP2010002745A (ja) * 2008-06-20 2010-01-07 Hitachi Displays Ltd 液晶表示装置
JP2011108366A (ja) * 2009-11-12 2011-06-02 Nec Lcd Technologies Ltd 面発光装置
JP2011198769A (ja) * 2011-06-15 2011-10-06 Mitsubishi Electric Corp 面状光源装置および表示装置

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