JP2014029804A - Lighting device, display device and television receiver - Google Patents

Abstract

Provided is a lighting device in which occurrence of luminance unevenness due to a gap formed between adjacent light source substrates is suppressed.
A lighting device 12 of the present invention includes a light source array L1 in which a plurality of light sources 16 are arranged in a line, a light incident surface 19c facing the light source array L1, a light guide plate 19 having a light exit surface 19a, and a light source. Each is assigned to each of the sub-light source rows L11 and L12 so that the row L1 is divided into a plurality of sub-light source rows L11 and L12, each having a mounting surface 17a on which the light source 16 is mounted and facing the light incident surface 19c. A plurality of light source boards 17 arranged in a row so that a gap is formed between the joined ends, and a pair of adjacent light source boards 17 and 17 are extended to one end 171 and mounted. The other light source has a light reflecting surface 22b that faces the light incident surface 19c and reflects light at a position deeper than 17a, and a part of the light reflecting surface 22b is exposed from the gap S1 between the light source substrates 17 and 17. Light superimposed on the end 172 of the substrate 17 And a Innovative portion 22.
[Selection] Figure 4

Description

  The present invention relates to a lighting device, a display device, and a television receiver.

  Liquid crystal panels are used in display devices such as televisions, mobile phones, and portable information terminals. The liquid crystal panel needs to use external light in order to display an image. Therefore, as shown in Patent Document 1, this type of display device includes a liquid crystal panel and an illumination device (so-called backlight device) for supplying light to the liquid crystal panel. This illuminating device is arranged on the back side of the liquid crystal panel, and is configured to irradiate light spread in a planar shape toward the back side of the liquid crystal panel.

  As the illuminating device, as disclosed in Patent Document 1, a so-called edge light including a light guide plate made of a transparent plate member and a light source unit arranged to face an end surface of the light guide plate. A type (or side light type) is known. The end surface of the light guide plate is a light incident surface on which light emitted from the light source unit is incident, and the front surface of the light guide plate emits light incident from the light incident surface. It is a surface. In recent years, in this type of lighting device, a light source unit in which a plurality of LEDs (Light Emitting Diodes) are mounted on a long LED substrate (hereinafter referred to as an LED unit) has been widely used. A light reflecting layer (light reflecting film) that reflects light is formed on the surface of the LED substrate.

  By the way, with a large illuminating device or the like, a plurality of LED units may be arranged to face the light incident surface in a state where they are arranged in a line. In this case, a slight gap is secured between adjacent LED units in order to allow thermal expansion of the LED substrate, dimensional tolerance of the LED substrate, mounting tolerance of the LED substrate, and the like.

JP 2009-224301 A

  Like the lighting device described above, when a plurality of LED units are arranged in a line and opposed to the light incident surface of the light guide plate, the front of the gap formed between adjacent LED units (LED substrates) There is a problem that the brightness of the portion is lower than the brightness of the surrounding portions. The gap is not provided with a light reflection layer that is formed on the surface of the LED substrate. For this reason, even if light enters the gap, the light cannot efficiently travel toward the light incident surface. As a result, the portion of the light incident surface of the light guide plate that faces the gap has a smaller amount of incident light than the other portions, so when the light guide plate is viewed from the front side, the front of the gap On the light guide plate (light emitting surface) of the portion, a dark portion having a stripe shape along the light emitting direction of the LED appears lower than the surrounding brightness. When such a dark portion appears in the light guide plate, luminance unevenness occurs in the planar light emitted from the light emitting surface of the illumination device, which in turn causes display unevenness in the display device.

  An object of the present invention is to provide an illumination device or the like in which generation of luminance unevenness derived from a gap formed between adjacent light source substrates is suppressed.

  The illumination device according to the present invention includes a light source array in which a plurality of light sources are arranged in a row while maintaining a distance from each other, and a plate-like member, which is composed of an end surface of the plate-like member and faces the light source row. A light guide plate having a light incident surface on which light from a light source is incident, a light emitting surface which is composed of a plate surface on the front side of the plate-like member and emits light incident from the light incident surface, and the light source array Each is assigned to each of the sub light source rows so as to be divided into a plurality of sub light source rows, each of which has a mounting surface on which the light source is mounted and faces the light incident surface, and a gap between adjacent end portions. A plurality of light source substrates arranged in a row so as to be formed, and of the pair of adjacent light source substrates, the end of one of the light source substrates is extended, and the shape is separated from the light incident surface. Opposite the light incident surface in a place deeper than the mounting surface A light reflection extending portion that overlaps an end portion of the other light source substrate in a form in which a part of the light reflection surface is exposed from a gap formed between the pair of light source substrates. Is provided. When the illuminating device has such a configuration, the light that has entered the gap formed between the pair of light source substrates is reflected on the light incident surface of the light guide plate by the light reflecting surface exposed from the gap. Will be reflected to the side. As a result, the difference in the amount of light incident between the portion of the light incident surface of the light guide plate facing the gap and the other portion is reduced, and the gap is not reflected in the light emitted from the light exit surface of the light guide plate. It is possible to suppress the occurrence of luminance unevenness derived from the above.

  The illuminating device may include a housing portion that is provided on the opposite side of the mounting surface at the end portion of the other light source substrate and that houses the light reflection extending portion. When the lighting device includes the housing portion, the position of the light reflection extending portion can be adjusted along the thickness direction of the light source substrate. That is, the position of the light reflecting surface formed in the light reflecting extension portion can be adjusted in the front-rear direction. In addition, by providing the accommodating portion, it is possible to reduce the thickness of a portion where the light reflection extending portion and the end portion of the other light source substrate on which the accommodating portion is provided are overlapped.

  In the illuminating device, the housing portion may have a shape recessed from the opposite side of the mounting surface so that the thickness of the end portion of the other light source substrate is reduced. It is easy to accommodate the light reflection extending portion when the accommodating portion has such a concave shape.

  In the illuminating device, the accommodating portion has a size such that a gap is formed between the opposite side of the end portion of the other light source substrate and the light reflecting surface of the light reflecting extension portion. You may have. When the housing portion has such a size, the housing portion is provided even when the pair of light source substrates expands and contracts due to the influence of thermal expansion or the like and each end portion moves. It is suppressed that the edge part of the said light source substrate which contacts the light reflection extension part. Therefore, it is suppressed that the edge part of the said light source substrate in which the accommodating part is provided contacts, and a light reflection layer peels off and damages.

  In the lighting device, the mounting surface may include a light reflecting film in a region where the light source is not mounted. When the mounting surface of the light source substrate includes the light reflecting film, the light emitted from the light source is reflected by the mounting surface, and the amount of light incident on the light incident surface can be increased.

  In the lighting device, the lighting device may be arranged in parallel to the mounting surface. In this way, when the light reflecting surface is arranged in parallel to the mounting surface, the mounting surface of the light source substrate and the light reflecting surface are directed in the same direction (that is, the light incident surface side), and light As with the mounting surface, the reflecting surface efficiently reflects light toward the light incident surface side.

  In the illuminating device, the light source may be mounted on the mounting surface at the end of the other light source substrate so as to overlap the housing portion.

  In the lighting device, the light reflecting surface may be set to have a light reflectance higher than that of the mounting surface of the light source substrate. The light reflecting surface is farther from the light incident surface of the light guide plate than the mounting surface of the light source substrate, and the light reflecting efficiency is low in position. Therefore, the light that has entered the gap is reflected with high efficiency by the light reflecting surface (particularly, the light reflecting surface exposed from the gap), so that the reflected light is incident on the light incident surface that faces the gap. It is easy to be done. As a result, the difference in the amount of light incident between the portion of the light incident surface of the light guide plate facing the gap and the other portion is reduced, and the gap is not reflected in the light emitted from the light exit surface of the light guide plate. It is possible to further suppress the occurrence of luminance unevenness due to.

  In the illumination device, one light source substrate and the other light source substrate may be shared. In the illuminating device, when one of the light source substrates and the other light source substrate are shared, the types of the light source substrates can be reduced, and the manufacturing cost and the like can be reduced.

  In the illumination device, the light reflecting surface may be made of an insulating light reflecting film. When the light reflecting surface is made of an insulating light reflecting film, the light reflecting extending portion provided at the end of one of the light source substrates is in contact with the other light source substrate, and is unnecessary. The occurrence of energization is suppressed.

  The display device according to the present invention includes the illumination device and a display panel that performs display using light from the illumination device.

  In the display device, the display panel may be a liquid crystal panel in which liquid crystal is sealed between a pair of substrates.

  The television receiver which concerns on this invention is provided with the said display apparatus.

  ADVANTAGE OF THE INVENTION According to this invention, the illuminating device etc. by which generation | occurrence | production of the brightness nonuniformity originating in the clearance gap formed between adjacent light source substrates was suppressed can be provided.

1 is an exploded perspective view showing a schematic configuration of a television receiver according to Embodiment 1 of the present invention. Exploded perspective view showing schematic configuration of liquid crystal display device Sectional drawing which shows the cross-sectional structure along the short side direction of a liquid crystal display device (A-A 'line sectional drawing of FIG. 2) Top view of lighting device Top view of a pair of adjacent LED units Enlarged view of FIG. Front view of FIG. The enlarged top view of the adjacent part in a pair of LED unit utilized with the illuminating device which concerns on Embodiment 2. FIG. The enlarged top view of the adjacent part in a pair of LED unit utilized with the illuminating device which concerns on Embodiment 3. FIG. The top view of a pair of LED unit utilized with the illuminating device which concerns on Embodiment 4. FIG. The enlarged top view of the adjacent part in a pair of LED unit utilized with the illuminating device which concerns on Embodiment 5. FIG.

<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to FIGS. In the present embodiment, the lighting device 12, the liquid crystal display device 10 including the lighting device 12, and the television receiver TV including the liquid crystal display device 10 are illustrated. In each drawing, an X axis, a Y axis, and a Z axis are shown. 2 and 3 is the front side, and the lower side is the back side, and the lighting device 12 and the like are used.

  FIG. 1 is an exploded perspective view illustrating a schematic configuration of the television receiver TV according to the first embodiment. As shown in FIG. 1, the television receiver TV of the present embodiment mainly includes a liquid crystal display device (display device) 10, front and back cabinets Ca and Cb that are stored so as to sandwich the liquid crystal display device 10, and a power source P. And a tuner T and a stand S. The liquid crystal display device 10 is supported by the stand S so that its display surface is along the vertical direction (Y-axis direction).

  FIG. 2 is an exploded perspective view showing a schematic configuration of the liquid crystal display device 10. FIG. 3 is a cross-sectional view (a cross-sectional view taken along line A-A ′ in FIG. 2) illustrating a cross-sectional configuration along the short side direction of the liquid crystal display device 10. As shown in FIG. 2, the liquid crystal display device 10 has a horizontally long rectangular shape when viewed from the front side, and includes a liquid crystal panel (display panel) 11 and a back surface 11 b side of the liquid crystal panel 11. And a frame-shaped bezel 13 that covers the front side (display surface 11a side) of the liquid crystal panel 11. These are integrally held by attaching the bezel 13 or the like to the lighting device 12. The bezel 13 is made of a metal material or the like.

  As shown in FIG. 2, the liquid crystal panel 11 has a horizontally long rectangular shape when viewed from the front side. The liquid crystal panel 11 mainly includes a pair of transparent glass substrates facing each other and a liquid crystal layer sealed between these substrates. Among these substrates, one glass substrate disposed on the back surface 11b side (back side) is a so-called thin film transistor (hereinafter, TFT) array substrate, and the other glass substrate disposed on the display surface 11a side (front side). Is a so-called color filter (hereinafter referred to as CF) substrate.

  The TFT array substrate is mainly composed of a plurality of TFTs as switching elements and a plurality of transparent pixel electrodes connected to the drain electrodes of each TFT in a matrix (matrix) on a transparent glass plate. It consists of what is provided. Individual TFTs and pixel electrodes are provided for each pixel, and are partitioned by a plurality of gate wirings and a plurality of source wirings provided on the glass plate so as to cross each other. . Note that the gate electrode in each TFT is connected to the gate wiring, and the source electrodes thereof are connected to the source wiring.

  The CF substrate is mainly formed on a transparent glass plate so that the CF composed of each color such as red (R), green (G), and blue (B) corresponds to each pixel of the TFT array substrate. It consists of what was provided in matrix form. Each CF is partitioned by a light-shielding black matrix (BM) provided in a lattice pattern on the glass plate. A transparent counter electrode or the like facing the pixel electrode of the TFT array substrate is provided on the CF and the BM.

  The liquid crystal panel 11 is configured to supply image data and various control signals necessary for displaying an image from the drive circuit substrate to the above-described source wiring, gate wiring, counter electrode, and the like. Drives in a matrix system. The liquid crystal panel 11 is provided with polarizing plates (not shown) on the display surface 11a side and the back surface 11b side so as to sandwich the pair of glass substrates.

  The illumination device 12 is a so-called edge light type (side light type), and mainly includes a chassis 14, an optical sheet 15, an LED unit (light source unit) LU, a light guide plate 19, a reflection sheet 20, and a frame 21. And.

  The chassis 14 has a shallow box shape with an open top, and is formed by pressing a plate material made of a metal material such as an aluminum-based material. The chassis 14 has a bottom portion 14a that is a horizontally long rectangle when viewed from the front side, a pair of wall portions 14c and 14d that are erected on an edge in the long side direction of the bottom portion 14a, and a short portion of the bottom portion 14a. And a pair of walls 14e and 14f provided upright on the side edge.

  The LED unit LU mainly includes a plurality of LEDs (light sources) 16 and an LED substrate (light source substrate) 17. The LED unit LU has a longitudinal shape as a whole, and is arranged on each long side of the lighting device 12. On each long side, two LED units LU are arranged along the walls 14c and 14d in a state where the two LED units LU are arranged in a line. That is, in the lighting device 12, a total of four LED units LU are used.

  The LED 16 is composed of a plurality of LED chips, which are light emitting elements, sealed in a housing with a resin material or the like (so-called LED package), and is configured to emit white light. For example, the LED 16 includes three types of LED chips having different main emission wavelengths. Specifically, each LED chip emits red (R), green (G), and blue (B) in a single color. It is configured as follows. In addition, as LED16, it is not restricted to such a structure, Another structure may be sufficient. Other configurations of the LED 16 include, for example, an LED chip that emits blue (B) in a single color, a phosphor having an emission peak in the red (R) region, and an emission peak in the green (G) region. The LED chip may be covered with a resin mixed with a phosphor (for example, a silicon-based resin). Further, as another configuration, a resin (for example, a silicon-based resin) in which an LED chip that emits blue (B) in a single color is incorporated and a phosphor that emits yellow light such as YAG (yttrium, aluminum, garnet) phosphor is mixed. ), The LED chip may be covered.

  The LED board 17 has a plate shape (long shape) that is elongated along the long side direction (X-axis direction) of the chassis 14 as a whole. The LED board 17 is housed in the chassis 14 with the front surface (mounting surface) 17a of the LED board 17 along the X-axis direction and the Z-axis direction (that is, the posture orthogonal to the plate surface 19a of the light guide plate 19). Has been. The LED board 17 is fixed to the wall part 14c (or wall part 14d) with screws (screws) or the like not shown in the state where the plate surface 17b on the back side is in contact with the wall part 14c (or wall part 14d) of the chassis 14. It is fixed by means.

  The LED substrate 17 is mainly formed on a long (band-shaped) base material made of a metal material such as an aluminum-based material, an insulating layer made of a synthetic resin formed on the base material, and the insulating layer. A wiring pattern made of a metal film such as copper foil and a reflective layer (reflective film) made of a white insulating film formed on the insulating layer so as to cover the wiring pattern. For convenience of explanation, the base material, the insulating layer, the wiring pattern, and the reflective layer in the LED substrate 17 are integrally shown in each drawing.

  A plurality of LEDs 16 are surface-mounted on a front surface (mounting surface) 17 a of the LED substrate 17. The LEDs 16 are arranged in a line along the longitudinal direction (X-axis direction) of the LED substrate 17 on the plate surface 17a. The LEDs 16 have the same shape (appearance shape) with each other on the plate surface (mounting surface) 17a and are arranged at equal intervals. Each LED 16 is connected to each other in series by the wiring pattern for each LED substrate 17. Further description of the LED unit LU will be described later.

  The reflection sheet 20 has a horizontally long rectangular shape as in the bottom portion 14a of the chassis 14 when viewed from the front side. The reflective sheet 20 of the present embodiment is a white foamed plastic sheet (for example, a foamed polyethylene terephthalate sheet). The reflection sheet 20 is accommodated in the chassis 14 so as to be placed on the bottom portion 14 a so as to cover the plate surface 19 f on the back side of the light guide plate 19. That is, the reflection sheet 20 is sandwiched between the light guide plate 19 and the bottom 14 a of the chassis 14.

  Similar to the liquid crystal panel 11 and the chassis 14, the light guide plate 19 has a horizontally long rectangular shape when seen in a plan view, and is made of a plate-like member having a predetermined thickness. The light guide plate 19 is manufactured from a synthetic resin material having a refractive index harder than air and substantially transparent (for example, an acrylic resin such as PMMA or a polycarbonate resin). The light guide plate 19 has a plate shape that is thicker than the optical sheet 15. The light guide plate 19 has a major side (front side plate surface 19a, rear side plate surface 19b) whose long side direction coincides with the X-axis direction, its short side direction coincides with the Y-axis direction, and the main surface (plate In each drawing, the thickness direction perpendicular to the surfaces 19a, 19b) is shown to coincide with the Z-axis direction. The light guide plate 19 is accommodated in the chassis 14 so that the plate surface 19b on the back side faces the bottom portion 14a with the reflection sheet 20 interposed therebetween.

  LED units LU are arranged on the outer sides of the two end surfaces 19c and 19d on the long side of the light guide plate 19, respectively. The LEDs 16 of the LED unit LU are opposed to the end surfaces 19c and 19d while maintaining a predetermined interval. The end surfaces 19c and 19d of the light guide plate 19 are light incident surfaces 19c and 19d on which light emitted from the LED 16 is incident. The light guide plate 19 has a function of raising and emitting light incident from the light incident surfaces 19c and 19d so as to be directed toward the front side while propagating inside. The front-side plate surface 19a of the light guide plate 19 serves as a light emitting surface 19a that emits light incident from the light incident surfaces 19c and 19d toward the liquid crystal panel 11 (optical sheet 15).

  The light incident surfaces 19c and 19d are arranged in parallel along the X-axis direction and the Z-axis direction (main plate surface 17a of the LED substrate 17), respectively, and are substantially orthogonal to the light emitting surface 19a. Further, the two end surfaces 19e and 19f on the short side of the light guide plate 19 are arranged in parallel along the Y-axis direction and the Z-axis direction, respectively, and are substantially orthogonal to the light emitting surface 19a.

  At least one of the light exit surface 19a and the back plate surface 19b of the light guide plate 19 is a reflective portion (not shown) that reflects the light inside the light guide plate 19, or a scattering portion that scatters the light inside the light guide plate 19. (Not shown) is patterned to have a predetermined in-plane distribution. Accordingly, the light emitted from the light emitting surface 19a is adjusted to have a uniform distribution in the surface.

  As shown in FIG. 2 and the like, the optical sheet 15 has a horizontally long rectangular shape when viewed from the front side, like the liquid crystal panel 11 and the like. The optical sheet 15 includes a laminate of a diffusion sheet 15a, a lens sheet 15b, and a reflective polarizing sheet 15c. The optical sheet 15 is placed on the plate surface 19 a so as to cover the front plate surface (light emitting surface) 19 a of the light guide plate 19. The size of the optical sheet 15 is set to be approximately the same as the size of the plate surface 19 a of the light guide plate 19.

  The frame 21 is a frame-like (frame-like) member along the periphery of the liquid crystal panel 11 and the light guide plate 19 and is made of synthetic resin or the like. The frame 21 is black and has a light shielding property. The frame 21 presses the end of the light guide plate 19 from the front side through the optical sheet 15 over substantially the entire circumference. The frame 21 is covered from the upper end side of each wall part 14c, 14d, 14e, 14f of the chassis 14 in which the light guide plate 19 and the like are accommodated. The frame 21 is fixed to each wall portion 14c, 14d, 14e, 14f of the chassis 14 by fixing means (not shown) such as screws. The peripheral edge of the liquid crystal panel 11 is placed on the inner peripheral edge of the frame 21.

  The liquid crystal panel 11 is attached to the chassis 14 with its peripheral edge sandwiched between the frame 21 and the above-described bezel 13 covered from the front side of the frame 21. The bezel 13 is fixed to the walls 14c, 14d, 14e, and 14f of the chassis 14 together with the frame 21 and the like by fixing means (not shown) such as screws.

  Next, the LED unit LU will be described in detail. FIG. 4 is a plan view of the lighting device 12. FIG. 4 shows the illumination device 12 with the frame 21 and the optical sheet 15 removed. As shown in FIG. 4, a pair (two) of LED units LU <b> 1 and LU <b> 2 arranged in a row are arranged so as to face one light incident surface 19 c of the light guide plate 19. A gap S1 is formed between adjacent LED units LU1 and LU2 (between adjacent LED substrates 17). The gap S1 is provided to allow thermal expansion of the LED board 17, dimensional tolerance of the LED board 17, and mounting tolerance of the LED board 17. A light incident surface 19c is disposed in front of the gap S1, and the gap S1 is opposed to the light incident surface 19c. The portion of the light incident surface 19c that faces the gap S1 is located at the approximate center in the long side direction of the light incident surface 19c. The size (width) of the gap S1 in the longitudinal direction (X-axis direction) of the LED substrate 17 is appropriately set.

  Each LED 16 provided in one LED unit LU1 and each LED 16 provided in the other LED unit LU2 form one LED row (light source row) L1 connected in a row. The LED row L1 is opposed to the light incident surface 19c while maintaining a space in a state of extending along the X-axis direction. Among the LEDs 16 constituting the LED row L1, a plurality of LEDs 16 assigned to the LED unit LU1 form a sub LED row (sub light source row) L11 on the LED substrate 17 of the LED unit LU1. Further, among the LEDs 16 constituting the LED row L1, the plurality of LEDs 16 assigned to the LED unit LU2 form another sub LED row (sub light source row) L11 on the LED substrate 17 of the LED unit LU2. . In the case of this embodiment, the LED row L1 is configured by a total of 20 LEDs 16. The 20 LEDs 16 constituting the LED array L1 are assigned to the LED units LU1 and LU2 for each of the sub LED arrays L11 and L12 each including 10 LEDs 16. The interval P1 between the LEDs 16 constituting the sub LED row L11 and the interval (pitch) between the LEDs 16 constituting the sub LED row L12 are both set to the same interval (size). The distance between the LED 16 mounted on the end 171 on the LED unit LU1 side and the LED 16 mounted on the end 172 on the LED unit LU2 side is substantially the same as the above-described distance P1. Is set as follows.

  On the other hand, as shown in FIG. 4, another pair (two) of LED units LU3 and LU4 arranged in a row is arranged so as to face the other light incident surface 19d of the light guide plate 19. ing. A gap S2 similar to the above-described gap S1 is also formed between adjacent LED units LU3 and LU4 (between adjacent LED substrates 17). A light incident surface 19d is disposed in front of the gap S2, and the gap S2 faces the light incident surface 19d. Moreover, each LED16 with which one LED unit LU3 is provided, and each LED16 with which the other LED unit LU4 is provided form one LED row (light source row) L2 connected to one row. That is, the illuminating device 12 of this embodiment is provided with two LED rows L1 and L2. The LED array L2 faces the light incident surface 19d while maintaining a space in a state of extending along the X-axis direction.

  Among the LEDs 16 constituting the LED row L2, the plurality of LEDs 16 assigned to the LED unit LU3 form a sub LED row (sub light source row) L21 on the LED substrate 17 of the LED unit LU3. In addition, among the LEDs 16 constituting the LED row L2, the plurality of LEDs 16 assigned to the LED unit LU4 form another sub LED row (sub light source row) L22 on the LED substrate 17 of the LED unit LU4. . The LED row L2 is also composed of a total of 20 LEDs 16 like the LED row L1. The 20 LEDs 16 constituting the LED array L2 are allocated to the LED units LU3 and LU4 for each of the sub LED arrays L21 and L22 each including 10 LEDs 16. The interval (pitch) between the LEDs 16 constituting the sub LED row L21 and the interval (pitch) between the LEDs 16 constituting the sub LED row L22 are both set to the same interval (P1).

  Here, a pair of LED units LU1 and LU2 constituting the LED array L1 disposed on the light incident surface 19c side of the light guide plate 19 will be described as an example. 5 is a top view of a pair of adjacent LED units LU1, LU2, FIG. 6 is an enlarged view of FIG. 5, and FIG. 7 is a front view of FIG. FIG. 5 shows the states of the LED units LU1 and LU2 arranged in the chassis 14 when the illumination device 12 (see FIG. 4) is viewed from the front side. One LED unit LU1 is shown on the left side of FIG. 5, and the other LED unit LU2 is shown on the right side thereof. As shown in FIGS. 5 and 6, the mounting surface 17a of the LED substrate 17 in one LED unit LU1 and the mounting surface 17a of the LED substrate 17 in the other LED unit LU2 are arranged on substantially the same plane. Yes. A reflective layer (reflective film) made of a white insulating film is formed on the outermost surface of each mounting surface 17a. This reflection layer is formed in a portion (area) where the LED 16 is not mounted in each mounting surface 17a.

  Of the pair of adjacent LED units LU1 and LU2, a light reflection extending portion 22 that reflects light entering the gap S1 is provided at the end 171 of one LED unit LU1. And the accommodating part 23 which accommodates the light reflection extending part 22 is provided in the edge part 172 of the other LED unit LU2.

  As shown in FIG. 6 and the like, the light reflection extending portion 22 has a plate-like piece having a thickness smaller than that of the end portion 171 at the end portion 171 of the LED substrate 17 on the LED unit LU1 side. It has a shape extending outward along the direction (X-axis direction). And the light reflection extending part 22 is provided in the edge part 171 of LED unit LU1 in the form which retracts in the back | inner side (opposite side to the mounting surface 17a) rather than the mounting surface 17a in LED unit LU1. Since the light reflection extending portion 22 is formed at the end portion 171 in such a manner that it is retracted to the back side, in front of the light reflection extending portion 22 (direction in which the light reflection extending portion 22 faces the light guide plate 19). A space is formed. In this space, the end 172 of the other LED unit LU2 is arranged.

  The light reflection extending portion 22 is provided on the support main body portion 22a provided integrally and continuously on the base material of the LED substrate 17, and on the surface of the support main body portion 22a (surface facing the light incident surface 19c side). And a light reflection layer (light reflection surface) 22b to be formed. The support main body portion 22a is made of the same material as the base material of the LED substrate 17, and is set to be thinner than the thickness of the base material of the LED substrate 17 (the thickness of the base material of the portion where the LED 16 is mounted). . In the case of the present embodiment, the thickness of the support main body portion 22a is set to about one third of the thickness of the base material in the LED substrate 17. A white light reflection layer (light reflection film) 22b is formed on the front surface (front surface) of the support body 22a facing the light guide plate 19 (light incident surface 19c). The surface of the light reflecting layer 22b becomes a light reflecting surface that reflects the light that has entered the gap S1 toward the light incident surface 19c. As the light reflection layer 22b that provides such a light reflection surface, for example, the same reflection layer (white insulating film) formed on the mounting surface 17a of the LED substrate 17 may be used, or Other light reflective coatings may be used. In the case of this embodiment, the light reflection layer 22b is formed so as to cover the entire surface (front surface) of the support main body 22a.

  The light reflection extending portion 22 is disposed on the back surface 17b side (the opposite side of the mounting surface 17a) of the end portion 172 in the other LED unit LU2 adjacent to the LED unit LU1. That is, the light reflection extension 22 on the LED unit LU1 side and the end 172 on the LED unit LU2 side overlap each other in the thickness direction (Y-axis direction). Then, the light reflection layer 22b of the light reflection extending portion 22 is formed between the end portion 171 of the LED substrate 17 on the LED unit LU1 side and the end portion 172 of the LED substrate 17 on the LED unit LU2 side (that is, the gap S1). Is exposed to the light incident surface 19 c side of the light guide plate 19. The light reflection extending portion 22 is disposed on the back surface 17b side of the end portion 172 on the LED unit LU2 side, so that the light reflection extending portion 22 does not interfere with the end portion 172 on the LED unit LU2 side. A space (space) for accommodating the light reflection extending portion 22 is provided on the back surface 17b side of the end portion 172 on the LED unit LU2 side. This space serves as the accommodating portion 23.

  The accommodating portion 23 has a shape in which the back surface 17b side of the end portion 172 on the LED unit LU2 side is recessed toward the mounting surface 17a side. The housing portion 23 has a shape extending along the longitudinal direction (X-axis direction) and the lateral direction (Z-axis direction) of the LED substrate 17. The accommodating part 23 can be formed by notching the base material part of the LED board 17 to a predetermined shape. Note that the end 172 on the LED unit LU2 side has a plate-like shape that protrudes along the longitudinal direction of the LED substrate 17 on the outside. It is smaller than the substrate 17). In the case of the present embodiment, the thickness at the end 172 on the LED unit LU2 side is set to about one third of the thickness of the LED substrate 17 in the portion where the accommodating portion 23 is not formed.

  The LED unit LU2 side end 172 and the LED unit LU1 side light reflection extension 22 are arranged in the thickness direction of the LED substrate 17 (Y-axis direction) when the light reflection extension 22 is accommodated in the accommodation unit 23. ) In a state of being overlapped while maintaining a gap (gap) T between each other. When such an interval T is formed when they are overlapped with each other, the LED units LU1 and LU2 expand and contract due to the influence of thermal expansion or the like, and the respective end portions 171 and 172 along the longitudinal direction (X-axis direction). Is moved, it is suppressed that the end portion 172 on the LED unit LU2 side comes into contact with the light reflection extending portion 22 provided on the end portion 171 of the LED unit LU1. Therefore, the end portion 172 on the LED unit LU2 side comes into contact with the light reflecting layer 22b and is prevented from being damaged by being peeled off.

  As shown in FIG. 6 and the like, in this embodiment, the LED 16 is also mounted on the end 172 on the LED unit LU2 side where the thickness is reduced. That is, in the thickness direction (Y-axis direction) of the LED substrate 17, the LED 16 on the LED unit LU2 side and the housing portion 23 are partially overlapped. Note that an electrode portion 161 of the LED 16 is also mounted on the end portion 172.

  As shown in FIG. 7, a gap S1 is formed between the end 171 of the LED board 17 on the LED unit LU1 side and the end 172 of the LED board 17 on the LED unit LU2 side. This gap S1 Therefore, the light reflection layer (light reflection surface) 22b formed on the light reflection extending portion 22 is exposed. The gap S1 is narrowed when the LED units LU1 and LU2 are thermally expanded, and is widened when the LED units LU1 and LU2 are thermally contracted. In addition, the size of the gap S1 changes as appropriate due to the effects of mounting errors, dimensional errors, and the like of the LED units LU1, LU2. Therefore, regardless of the size of the gap S1, the light reflecting layer (light reflecting surface) 22b is subjected to light reflecting and spreading so that the light reflecting layer (light reflecting surface) 22b is reliably exposed from the gap S1. It is necessary to form on the support main body part 22a of the installation part 22. FIG.

  A portion corresponding to the accommodating portion 23 provided in the end portion 172 of the LED unit LU2 is formed in the end portion 173 of the LED unit LU1 in which the light reflection extending portion 22 is not provided. Further, a portion corresponding to the light reflection extending portion 22 of the LED unit LU1 is formed at the end 174 of the LED unit LU2 where the housing portion 23 is not provided. In the case of this embodiment, there is no problem even if the end portion 173 of the LED unit LU1 is formed with a portion corresponding to the housing portion 23, and there is no problem with the end portion 174 of the LED unit LU2 and the light reflection extension portion 22. There is no problem even if the corresponding portion is formed. The LED unit LU1 and the LED unit LU2 of the present embodiment have a common structure, so that the types of components can be reduced and the manufacturing cost can be reduced.

  The pair of LED units LU3 and LU4 arranged on the light incident surface 19d side of the light guide plate 19 has the same configuration as the LED units LU1 and LU2 described above.

  When the liquid crystal display device 10 displays an image on the display surface 11a of the liquid crystal panel 11, each LED 16 of each LED unit LU included in the illumination device 12 emits light (lights up). When each LED 16 emits light, light enters the light guide plate 19 from the end surface (light incident surface) 19 c of the light guide plate 19. The incident light is reflected by the reflecting sheet 20 laid on the back side of the light guide plate 19, the reflecting portion formed on the back surface 19 b or the front surface 19 a of the light guide plate 19, and the like while traveling through the light guide plate 19. The light is emitted from the front side plate surface (light emitting surface) 19a. The light emitted from the plate surface 19a passes through the optical sheet 15 and spreads into a planar shape, and illuminates the liquid crystal panel 11 from the back surface 11b. The liquid crystal panel 11 displays an image on the display surface 11a using the light from the illumination device 12.

  The illuminating device 12 according to the present embodiment includes LED rows (light source rows) L1 and L2 in which a plurality of light sources are arranged in a row while keeping a distance from each other, and a plate-like member, from the end face of the plate-like member The light incident surfaces 19c and 19d that face the LED rows (light source rows) L1 and L2 and receive light from the LED (light source) 16 and the plate surface 19a on the front side of the plate member, Each of the light guide plate 19 having a light exit surface 19a for emitting light incident from 19d and the LED rows (light source rows) L1 and L2 are divided into a plurality of sub light source rows L11, L12, L21, and L22. An LED (light source) 16 is mounted for each of the sub-light source rows L11, L12, L21, and L22, and has mounting surfaces 17a and 17a that face the light incident surfaces 19c and 19d, respectively, and adjacent end portions 171, Among the plurality of LED boards (light source boards) 171 that are arranged in a row so that gaps S1 and S2 are formed between 72 and a pair of adjacent LED boards (light source boards) 171, one of the LED boards 171 A light reflecting surface 22b that extends from the end portion 171 and faces the light incident surfaces 19c and 19d and reflects light at a position deeper than the mounting surface 17a away from the light incident surfaces 19c and 19d. A light reflection extending portion 22 that overlaps an end portion 172 of the other LED substrate 171 in such a manner that a part of the light reflection surface 22b is exposed from the gaps S1 and S2 formed between the LED substrates 171 and 171.

  When the illuminating device 12 of this embodiment is provided with such a configuration, the light that has entered the gaps S1 and S2 formed between the pair of LED substrates 17 and 17 reflects light that is exposed from the gaps S1 and S2. The light is reflected toward the light incident surfaces 19c and 19d of the light guide plate 19 by the surface 22b. As a result, the difference in the amount of light incident between the portions of the light incident surfaces 19c and 19d of the light guide plate 19 facing the gaps S1 and S2 and the other portions is reduced, and the light exit surface 19a of the light guide plate 19 is reduced. The occurrence of luminance unevenness due to the gaps 19c and 19d in the light emitted from the light is suppressed.

  Moreover, the illuminating device 12 of this embodiment is provided with the accommodating part 23 in which the light reflection extension part 22 is accommodated provided in the other side of the mounting surface 17a in the edge part 172 of the other LED board. Thus, when the accommodating part 23 is provided in the other side of the mounting surface 17a in the edge part 172 of the other LED unit LU2, the position of the light reflection extending part 22 is set in the thickness direction (Y axis of the LED substrate 171). Direction). That is, the position of the light reflection surface 22b formed in the light reflection extending portion 22 can be adjusted in the front-rear direction (Y-axis direction). Further, by providing the accommodating portion 23, the thickness of the portion where the light reflection extending portion 22 and the end portion 172 on the LED unit LU2 side overlap can be reduced.

  Further, the lighting device 12 of the present embodiment has a shape in which the housing portion 23 is recessed from the opposite side 17b of the mounting surface 17a so that the thickness at the end portion 172 of the LED substrate 17 on the LED unit LU2 side is reduced. Yes. As the accommodating part 23, it is easy to accommodate the light reflection extension part 22 as it is such a concave shape.

  In the illumination device 12 of the present embodiment, the housing portion 23 has a gap between the opposite side 17b of the end portion 172 of the LED substrate 17 on the LED unit LU2 side and the light reflecting surface 22b of the light reflecting extension portion 22. The size is such that T is formed. If the housing portion 23 has such a size, the LED units LU1 and LU2 expand and contract due to the effects of thermal expansion and the like, and the end portions 171 and 172 move along the longitudinal direction (X-axis direction). Even in this case, the end 172 on the LED unit LU2 side is prevented from coming into contact with the light reflection extending portion 22 provided on the end 171 of the LED unit LU1. Therefore, the end portion 172 on the LED unit LU2 side comes into contact with the light reflecting layer 22b and is prevented from being damaged by being peeled off.

  In the illumination device 12 of the present embodiment, the mounting surface 17a includes a light reflecting film in a region where the LEDs 16 are not mounted. As described above, when the mounting surface 17a of the LED substrate 17 includes the light reflecting film on the outermost surface, the light emitted from the LED 16 is reflected by the mounting surface 17a and enters the light incident surfaces 19c and 19d. You can increase the amount of light. The material used for the light reflecting film can be used as the material for the light reflecting surface 22b formed on the light reflecting extension 22.

  In the illumination device 12 of the present embodiment, the light reflecting surface 22b is arranged in parallel to the mounting surface 17a. Thus, when the light reflecting surface 22b is arranged in parallel to the mounting surface 17a, the mounting surface 17a and the light reflecting surface 22b of the LED substrate 17 are in the same direction (that is, the light incident surfaces 19c and 19d side). The light reflecting surface 22b is likely to efficiently reflect light toward the light incident surfaces 19c and 19d in the same manner as the mounting surface 17a.

  In the illumination device 12 of the present embodiment, the LED 16 is mounted on the mounting surface 17a of the end portion 172 of the LED substrate 17 on the LED unit LU2 side so as to overlap in the thickness direction of the housing portion 23 and the LED substrate 17. Yes. As described above, the LED 16 may be mounted on the end portion 172 of the LED substrate 17 so as to overlap the housing portion 23. That is, in the lighting device 12 of the present embodiment, the LEDs 16 are appropriately mounted on the end portion 172 so as to overlap the housing portion 23, and the interval (pitch) between the adjacent LEDs 16 is set narrow. Can do.

  In the illumination device 12 of the present embodiment, the LED board 171 in one LED unit LU1 and the LED board 171 in the other LED unit LU2 are shared. That is, the LED board 171 in one LED unit LU1 and the LED board 171 in the other LED unit LU2 have the same structure and can be shared. Similarly, the LED units LU3 and LU4 have the same structure and can be shared. Therefore, in the present embodiment, the types of LED units LU (LED substrates 171) that are necessary can be reduced, and the manufacturing cost and the like can be reduced.

<Embodiment 2>
Next, Embodiment 2 of the present invention will be described with reference to FIG. In the following embodiments, the same parts as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and detailed description thereof is omitted. FIG. 8 is an enlarged top view of adjacent portions in the pair of LED units LU1A and LU2A used in the lighting apparatus according to the second embodiment. In the LED units LU1A and LU2A of the present embodiment, the interval P2 between the LEDs 16 mounted on the mounting surface 17a of the LED substrate 17 is set larger than that of the first embodiment (interval P1). And LED16 is mounted in the form which overlaps with the accommodating part 23 in the edge part 172 by the side of LED unit LU2A. In the present embodiment, the range (part) in which the LED 16 overlaps the housing portion 23 is smaller than that in the first embodiment. As described above, the range in which the LEDs 16 overlap with the housing portion 23 can be appropriately set according to the required interval P2 between the LEDs 16 or the like. The interval between the LED 16 mounted on the end 171 of the LED unit LU1A and the LED 16 mounted on the end 172 of the LED unit LU2A is set to be substantially the same as the above-described interval P2. ing.

<Embodiment 3>
Next, Embodiment 3 of the present invention will be described with reference to FIG. FIG. 9 is an enlarged top view of adjacent portions in the pair of LED units LU1B and LU2B used in the lighting apparatus according to the third embodiment. In the LED units LU1B and LU2B of the present embodiment, the interval P3 between the LEDs 16 mounted on the mounting surface 17a of the LED substrate 17 is set larger than that of the first embodiment (interval P2). That is, the interval P3 is set larger than that of the first embodiment (interval P1). And LED16 is mounted in the form which overlaps with the accommodating part 23 in the edge part 172 by the side of LED unit LU2B. In the present embodiment, the range (part) in which the LED 16 overlaps the housing portion 23 is further smaller than that in the second embodiment. In the case of the present embodiment, a part of the electrode portion 161 on the side portion (side portion in the X-axis direction) of the LED 16 is overlapped with the housing portion 23. That is, the portion that emits light is not mounted on the end 172. As described above, the range in which the LEDs 16 overlap with the housing portion 23 can be appropriately set according to the required interval P3 between the LEDs 16 as in the second embodiment. The interval between the LED 16 mounted on the end 171 of the LED unit LU1B and the LED 16 mounted on the end 172 of the LED unit LU2B is set to be substantially the same as the above-described interval P3. ing.

<Embodiment 4>
Next, Embodiment 4 of the present invention will be described with reference to FIG. FIG. 10 is a top view of a pair of LED units LU1C and LU2C used in the lighting apparatus according to the fourth embodiment. Each LED unit LU1C, LU2C of the present embodiment includes portions corresponding to the light reflection extending portion 22 and the accommodating portion 23 as in the first embodiment, at the respective end portions 173C, 174C that are not adjacent to each other. Not. Each of the end portions 173C and 174C of the LED units LU1C and LU2C has the same thickness as that of the other LED substrate 17, and has a flat end surface. In the present embodiment, the LED unit LU1C and the LED unit LU2C have no common structure. Thus, the LED unit LU1C and the LED unit LU2C may have different structures.

<Embodiment 5>
Next, Embodiment 5 of the present invention will be described with reference to FIG. FIG. 11 is an enlarged top view of adjacent portions in the pair of LED units LU1D and LU2D used in the lighting apparatus according to the fifth embodiment. The light reflection extension 22D provided at the end 171 of the LED unit LU1D includes a support body 22Da similar to that of the first embodiment. However, in the case of the present embodiment, the light reflectivity of the light reflecting layer 22Db formed on the surface of the support main body 22Da (the surface facing the light incident surface 19c side of the light guide plate 19) is in each of the LED units LU1D and LU2D. It is set higher than the light reflectance of the mounting surface 17a. As in the first embodiment, a reflective layer made of a white insulating film is formed on the mounting surface 17a. A predetermined amount of white pigment is added to the insulating film. The light reflection layer (light reflection surface) 22Db formed in the light reflection extending portion 22D is made of a white insulating film similar to the mounting surface 17a, but the amount of the white pigment added to the insulating film However, it is more than what is formed on the mounting surface 17a, and the light reflectance is increased. The light reflection layer (light reflection surface) 22Db is farther from the light incident surface 19c of the light guide plate 19 than the mounting surface 17a of the LED substrate 171, and the light reflection efficiency is low in position. Therefore, in this embodiment, the light that has entered the gap S1 is reflected with high efficiency by the light reflecting layer 22Db (particularly, the portion of the light reflecting layer 22Db exposed from the gap S1). Reflected light is easily incident on the light incident surface 19C. As a result, the difference in the amount of light incident between the portion of the light incident surface 19c of the light guide plate 19 facing the gap S1 and the other portion is reduced, and the light is emitted from the light output surface 19a of the light guide plate 19. In other words, the occurrence of uneven brightness due to the gap 19c is further suppressed.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

  (1) In the above embodiment, one LED row (light source row) L1 is composed of two sub LED rows (sub light source rows) L11 and L12. One LED row may be composed of three or more sub LED rows. That is, a structure in which three or more LED substrates are arranged in a line may be arranged to face the light incident surface of the light guide plate 19.

  (2) In the above embodiment, the pair of adjacent LED substrates 17 have the same thickness. However, in other embodiments, for example, the thickness of the LED substrate on one LED unit LU1 side is set. Alternatively, it may be set larger than the thickness of the LED substrate on the other LED unit LU2 side. And the accommodating part 23 does not need to be formed in the edge part 172 by the side of LED unit LU2. That is, in the LED unit LU2 of the first embodiment, the thickness of the end portion 171 of the portion where the accommodating portion 23 is formed (the portion where the thickness is thin) is set as the thickness of the entire LED substrate of the LED unit LU2. It may be. With such a configuration, there is no need to provide the accommodating portion 23 for accommodating the light reflection extending portion 22 on the LED unit LU2 side.

  (3) In the above embodiment, the interval between the LEDs 16 forming the LED row (light source row) L1 is set to be substantially constant (substantially equidistant). However, in other embodiments, the interval between the LEDs 16 is constant. Not necessarily.

  (4) In the above embodiment, the support main body portion 22a of the light reflection extending portion 22 is provided in a state of being continuously integrated with the base material of the LED substrate 17, but in other embodiments, the present invention is provided. As long as the purpose is not impaired, the base material of the LED substrate 17 may be a separate member. And you may connect the support main-body part 22a of the light reflection extension part 22 to the base material of the LED board 17 using well-known connection techniques, such as an adhesive agent and welding.

  (5) In the above embodiment, the LED 16 is used as the light source. However, in other embodiments, a light source other than the LED 16 may be used.

  (6) In another embodiment, for example, a configuration in which an LED (LED unit) faces only one end surface of the light guide plate may be used.

  (7) In the above embodiment, the LED unit LU is fixed at the chassis wall, but in other embodiments, for example, the LED unit LU is fixed to a heat dissipating member (heat spreader). The structure attached to a chassis may be sufficient.

  (8) When the light reflection surface (light reflection layer) formed on the light reflection extension portion is made of an insulating light reflection film, the light reflection extension portion provided at the end of one LED substrate is: It is possible to prevent unnecessary energizations from occurring due to contact with the end portion of the other LED substrate.

  (9) In the above embodiment, the liquid crystal panel and the chassis are vertically placed with the short side direction aligned with the vertical direction, but the liquid crystal panel and chassis have the long side direction aligned with the vertical direction. What was made into the vertically placed state made into the above is also contained in this invention.

  (10) In the above embodiment, the TFT is used as the switching element of the liquid crystal display device. However, the present invention can also be applied to a liquid crystal display device using a switching element other than the TFT (for example, a thin film diode (TFD)). In addition to a liquid crystal display device that performs color display, the present invention can also be applied to a liquid crystal display device that performs monochrome display.

  (11) In the above embodiment, a liquid crystal display device using a liquid crystal panel as the display panel has been illustrated, but the present invention can also be applied to a display device using another type of display panel.

  (12) In the above embodiment, the television receiver provided with the tuner is exemplified, but the present invention can also be applied to a display device not provided with the tuner.

  DESCRIPTION OF SYMBOLS 10 ... Liquid crystal display device (display device), 11 ... Liquid crystal panel (display panel), 12 ... Illumination device, 13 ... Bezel, 14 ... Chassis, 15 ... Optical sheet (optical member), 16 ... Light source (LED), 17 ... LED substrate (light source substrate), 19 ... light guide plate, 19a ... front side plate surface (light emitting surface), 19c, 19d ... light incident surface, 20 ... reflective sheet, 21 ... frame, 22 ... light reflecting extension, 22a ... support main body part, 22b ... light reflecting surface (light reflecting layer), 23 ... housing part, 171, 172 ... end of LED substrate, L1, L2 ... LED row (light source row), L11, L12, L21, L22 ... Sub LED row (sub light source row), S1, S2 ... gap, T ... gap, TV ... TV receiver

Claims (13)

A light source array in which a plurality of light sources are arranged in a row while maintaining a gap between them,
A plate-shaped member, which is composed of an end surface of the plate-shaped member and is opposed to the light source array and is incident with light from the light source; A light guide plate having a light exit surface for emitting light incident from
Each of the light source columns is assigned to each sub light source column so that the light source column is divided into a plurality of sub light source columns, each of which has a mounting surface on which the light source is mounted and faces the light incident surface. A plurality of light source substrates arranged in a row so that a gap is formed between the parts;
Of the pair of light source substrates adjacent to each other, the light is extended to an end portion of one of the light source substrates and is opposed to the light incident surface at a position deeper than the mounting surface away from the light incident surface. A light reflection extending portion that has a light reflection surface to be reflected and overlaps an end portion of the other light source substrate so that a part of the light reflection surface is exposed from a gap formed between the pair of light source substrates; A lighting device comprising:   The illuminating device according to claim 1, further comprising an accommodating portion that is provided on the opposite side of the mounting surface at the end of the other light source substrate and accommodates the light reflecting extension portion.   The lighting device according to claim 2, wherein the housing portion has a shape recessed from an opposite side of the mounting surface so that a thickness at the end portion of the other light source substrate is reduced.   The said accommodating part has a magnitude | size that a clearance gap is formed between the said opposite side in the said edge part of the said other light source board | substrate, and the said light reflection surface of the said light reflection extending part. The lighting device according to claim 3.   The lighting device according to any one of claims 1 to 4, wherein the mounting surface includes a light reflection film in a region where the light source is not mounted.   The lighting device according to claim 1, wherein the light reflecting surface is arranged in parallel to the mounting surface.   The illuminating device according to any one of claims 2 to 6, wherein the light source is mounted on the mounting surface at the end of the other light source substrate so as to overlap the housing portion.   The lighting device according to any one of claims 1 to 7, wherein the light reflecting surface is set to have a higher light reflectance than the mounting surface of the light source substrate.   The lighting device according to any one of claims 1 to 8, wherein the one light source substrate and the other light source substrate are shared.   The lighting device according to any one of claims 1 to 9, wherein the light reflecting surface is made of an insulating light reflecting film.   A display device comprising: the illumination device according to any one of claims 1 to 10; and a display panel that performs display using light from the illumination device.   The display device according to claim 11, wherein the display panel is a liquid crystal panel in which liquid crystal is sealed between a pair of substrates.   A television receiver comprising the display device according to claim 11.

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