JP2014041761A - Lighting device, display device and television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device in which the occurrence of brightness irregularity originated from a gap formed between light source substrates adjacent to each other is suppressed.SOLUTION: A lighting device 12 includes: a light source array L1 made by arranging a plurality of light sources 16 side by side; a light guiding plate 19 having a light incident surface 19c to which light from the light source 16 is made incident and a light effluent surface 19a from which light is made effluent; a plurality of light source substrates 17 which are respectively assigned at every sub light source arrays L11, L12 such that the light source arrays L1 is divided to a plurality of sub light source arrays L11, L12, respectively have mounting surfaces 17a which allow the light sources 16 mounted thereon and are opposed to the light incident surface 19c, and are arrayed such that a gap S1 is formed between edge parts 171, 172 adjacent to each other; and a regulation reflective member 22 having a main body part 22a which is arranged between the light source substrate 17 and the light incident surface 19c so as to cover the gap S1, assumes a form of extending to the light incident surface 19c side from the light sources 16 and regulates an interval between the light source 16 and the light incident surface 19c, and light reflection surface 22b which reflects light toward the light incident surface 19c.

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. Are arranged between the light source substrate and the light incident surface so as to cover the gap, and closer to the light incident surface side than the light source. It has a protruding shape and regulates the distance between the light source and the light incident surface. Includes a body portion, and the regulating reflecting member having a light reflecting surface for reflecting light toward the light incident surface disposed on the surface of the body portion.

  In the illuminating device, the regulation reflecting member is disposed between the light source substrate and the light incident surface, and has a shape protruding from the light source toward the light incident surface, and the light source and the light incident surface. It has the main-body part which regulates the space | interval between. The main body is disposed between the light source substrate and the light incident surface so as to cover a gap formed between end portions of adjacent light source substrates, and light from the light source enters the gap. That is restrained. Further, a light reflecting surface is disposed on the surface of the main body, and light is reflected toward the light incident surface of the light guide plate by the light reflecting surface. Therefore, in the illuminating device, light can be prevented from entering the gap by the main body portion of the regulating reflecting member, and light can be reflected toward the light incident surface by the light reflecting surface. As a result, in the illuminating device, the amount of light incident on the light incident surface of the portion facing the gap increases, and between the portion of the light incident surface facing the gap and the other portion. The difference in the amount of incident light is reduced, and the occurrence of uneven brightness due to the gap is suppressed in the light emitted from the light exit surface of the light guide plate.

  In the illuminating device, the light reflecting surface may be a surface of a coating film having light reflectivity formed on the surface of the main body. When the light reflecting surface is formed from a coating film having light reflectivity, the light reflectance of the light reflecting surface is appropriately adjusted by appropriately changing the composition of the coating film and the thickness of the coating film. It becomes possible. In addition, when the light reflecting surface is formed from a coating film having light reflectivity, the light reflecting surface may be appropriately provided on the surface of the main body regardless of the surface shape of the main body (for example, planar or curved). it can.

  In the lighting device, the main body may be made of an elastic material. If the main body is made of an elastic material, the light incident surface is elastically deformed even if the light incident surface of the light guide plate contacts the restricting reflective member. Damage to the member is suppressed. The elastic material is preferably a white elastic material. If it consists of such a white elastic material, it will become possible to utilize the surface of the said main-body part as a light reflection surface as it is. In addition, when the light-reflective coating film is formed on the surface of the main body portion, the white main body portion is exposed from the lower side even if the coating film is peeled off. Can be used as a part of

  In the lighting device, the main body has a column shape extending along the thickness direction of the light guide plate so as to cover all the gaps, and the light reflecting surface is arranged on a peripheral surface of the main body having a column shape. It may be a thing. When the main body portion has such a configuration, the light from the light source is reliably suppressed from entering the gap.

  In the illuminating device, the main body may be disposed in contact with each end of the light source substrate so as to cover the gap so that each end of the adjacent light source substrates can be extended. Good. When the main body portion has such a configuration, each end portion of the light source substrate expands due to the influence of heat or the like, even if the main body portion of the regulation reflecting member is arranged to cover the gap. Is allowed to do.

  In the lighting device, the mounting surface may have an insulating light reflection film, and the light reflection surface may have the same light reflectance as the light reflection film. When the light reflecting surface has the same light reflectance as the light reflecting film on the mounting surface, between the light reflected by the mounting surface and the light reflected by the light reflecting surface of the regulation reflecting member Variation in brightness can be suppressed.

  In the lighting device, the main body may be made of a metal material, and the light reflecting surface may be made of a surface of the main body. When the main body portion of the regulation reflecting member is made of a metal material, the surface of the main body portion can be used as it is as the light reflecting surface.

  In the illuminating device, the light reflecting surface may have a curved surface or a flat surface at a portion facing the light incident surface. When the light reflecting surface has a curved surface or a flat surface at a portion facing the light incident surface, even if the main body portion of the regulation reflecting member contacts the light incident surface, the contact portion is Since it has a curved surface or a flat shape, contact with the light incident surface is alleviated, and the light incident surface is suppressed from being damaged.

  In the illuminating device, a chassis having a plate-like bottom portion arranged so as to cover a plate surface on the back side of the light guide plate, and a wall portion standing on the periphery of the bottom portion and arranged outside the light source substrate. The regulation reflecting member may be fixed so that the main body portion is connected to the wall portion.

  In the illuminating device, the regulation reflecting member may include a connection fixing portion that connects the main body portion and the wall portion so as to pass through the gap. When the regulation reflecting member is fixed to the wall portion using a connection fixing portion that couples the main body portion and the wall portion so as to pass through the gap, the attachment structure of the regulation reflection member is small. It becomes.

  The lighting device includes a chassis having a plate-like bottom portion that is arranged to cover a plate surface on the back side of the light guide plate, and the regulation reflecting member is fixed so that the main body portion is connected to the bottom portion. It may be done.

  The lighting device includes a heat radiating member disposed on an opposite side of the mounting surface of the light source substrate, and the regulation reflecting member is fixed in such a manner that the main body is connected to the heat radiating member. Also good. When the regulation reflecting member is fixed in a form connected to the heat radiating member, the heat received by the regulation reflecting member can be moved to the heat radiating member and released.

  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 Plan view (top view) of the regulation reflecting member Front view of the regulation reflecting member viewed from the LED side of the LED unit The top view (top view) of the control reflective member concerning Embodiment 2 The front view of the control reflective member which concerns on Embodiment 2 seen from the LED side of the LED unit The top view (top view) of the control reflective member concerning Embodiment 3 The front view of the control reflective member which concerns on Embodiment 3 seen from the LED side of the LED unit The top view (top view) of the control reflective member concerning Embodiment 4 The front view of the control reflective member which concerns on Embodiment 4 seen from the LED side of the LED unit The top view (top view) of the control reflective member concerning Embodiment 5 The front view of the control reflective member which concerns on Embodiment 5 seen from the LED side of the LED unit The top view (top view) of the control reflective member concerning Embodiment 6 The front view of the control reflective member which concerns on Embodiment 6 seen from the LED side of the LED unit The front view of the control reflective member which concerns on Embodiment 7 seen from the LED side of the LED unit The top view (top view) of the control reflective member concerning Embodiment 8

<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 6. 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 a regulation reflecting member 22. 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.

  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 has a structure (so-called LED package) in which an LED chip is sealed with a resin material on a substrate portion fixed to the LED substrate 17. The LED chip mounted on the substrate unit has a single main emission wavelength. Specifically, those that emit blue light in a single color are used as LED chips. In the resin material that seals the LED chip, a phosphor that emits a predetermined color when excited by blue light emitted from the LED chip is dispersed and blended. The resin material is generally configured to emit white light. As the phosphor, for example, a suitable combination of a yellow phosphor that emits yellow light, a green phosphor that emits green light, and a red phosphor that emits red light may be used. They may be used alone. The LED 16 is a so-called top-emitting type in which a surface opposite to the mounting surface with respect to the LED substrate 17 is a main light emitting surface 16a.

  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.

  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 (for example, acrylic resin such as PMMA or polycarbonate resin) having a refractive index higher than that of air and substantially transparent. 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. 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. In addition, among the LEDs 16 constituting the LED array L1, a plurality of LEDs 16 assigned to the LED LU2 form another sub LED array (sub light source array) L12 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). Further, 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. Set to

  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 is opposed to the light incident surface S2. 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 array L2, a plurality of LEDs 16 allocated to the LED unit LU4 form another sub LED array (sub light source array) L22 on the LED board 17 of the LED unit LU4. Yes. 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).

  The regulation reflecting member 22 is disposed between the LED substrate 17 and the light incident surfaces 19 c and 19 d of the light guide plate 19 so as to cover the gaps S <b> 1 and S <b> 2 formed between the adjacent LED substrates 17. One restriction reflecting member 22 is assigned to each of the gaps S1 and S2. The regulation reflecting members 22 and 22 assigned to the gaps S1 and S2 have the same structure. Here, the regulation reflection member 22 will be described in detail by taking the regulation reflection member 22 disposed on the gap S1 side as an example.

  FIG. 5 is a plan view of the regulation reflecting member 22. FIG. 5 shows the upper surface of the restrictive reflecting member 22 when viewed from the front side of the lighting device 12. FIG. 6 is a front view of the regulation reflecting member 22 as viewed from the LED 16 side of the LED unit LU. The regulation reflecting member 22 has a function of regulating the distance (distance) between the light incident surface 19c and the LED 16 so that the light incident surface 19c of the light guide plate 19 does not come into contact with the LED 16, and transmits light to the light incident surface 19c. It has a function of reflecting toward the side.

  The regulation reflecting member 22 mainly includes a main body portion 22a and a light reflecting surface 22b. The main body 22a covers the gap S1 formed between the adjacent LED units LU1 and LU2 from the side of the plate surface 17a of the LED board 17, and the LED boards 17 and 17 of the LED units LU1 and LU2 The portion disposed between the light incident surface 19c of the light guide plate 19 (see FIG. 4). The main body 22a has a triangular prism shape extending along the direction (Z-axis direction) in which the LED board 17 stands with respect to the bottom 14a of the chassis 14. The main body portion 22a having a triangular prism shape is in a state of standing on the bottom portion 14a.

  Of the three side surfaces (circumferential surfaces) of the main body portion 22a having a triangular prism shape, one side surface (rear surface) 22a1 covers the gap S1 from the plate surface 17a side as a whole. Thus, it is preferable to cover the main body portion 22a without leaving the gap S1. The remaining two side surfaces face the light incident surface 19c side of the light guide plate 19, and light reflecting surfaces 22b are formed on the respective side surfaces. The side surface 22a1 of the main body portion 22a has a rectangular shape, and is arranged in contact with the surface (plate surface 17a) of each end portion 171 and 172 of each adjacent LED substrate 17 and 17 together with the gap S1. Yes.

  The main body 22a is formed by processing an elastic material such as synthetic rubber or elastomer into a predetermined shape, and is elastically deformed when an external force is applied. The main body portion 22a has a shape protruding from the LED 16 toward the light incident surface 19c side of the light guide plate 19 in close contact with the end portions 171 and 172 of the adjacent LED substrates 17 and 17. As shown in FIG. 5, the upper surface of the main body portion 22a has an isosceles triangle shape with the apex angle disposed on the light incident surface 19c side, and the main body portion 22a has the apex angle of the main light emitting surface of the LED 16. It protrudes toward the light incident surface 19c rather than 16a.

  In the present embodiment, the height (length in the Z-axis direction) of the main body 22a is set to be substantially the same as the height (length in the short direction) of the LED board 17. The main body portion 22 a is arranged between the LED 16 mounted on the end portion 171 of one LED substrate 17 and the LED 16 mounted on the end portion 172 of the other LED substrate 17. There is a gap between the main body portion 22a and the LEDs 16 on the end portions 171 and 172, so that the main body portion 22a (the regulation reflecting member 22) is prevented from contacting each LED 16.

  The light reflection surface 22b has a function of reflecting the light emitted from the LED 16 toward the gap S1 and directing the light toward the light incident surface 19c. In the case of the present embodiment, the light reflecting surface 22b is composed of a surface of a light reflecting film formed on the surface of the main body portion 22a facing the light incident surface 19c side of the light guide plate 19 (two side surfaces other than the side surface 22a1). As this light reflecting film, a known light reflecting film can be appropriately used. In the present embodiment, the light reflecting surface 22b faces the light incident surface 19c in an inclined state. The light reflectance of the light reflecting surface 22b is appropriately set according to the purpose. The light reflecting surface 22b is preferably provided on at least a portion of the surface of the main body portion 22a facing the light incident surface 19c side of the light guide plate 19.

  The regulation reflecting member 22 is fixed to the wall portion 14 c of the chassis 14 via a connection fixing portion 23. This connection fixing part 23 is a part of the regulation reflection member 22, and is attached to the back surface 22a1 side of the main body part 22a. The connecting and fixing portion 23 has an elongated rod shape, and a tip portion thereof is inserted into a through-hole mounting hole 140 provided in the wall portion 14c. Further, the opposite end of the connection fixing portion 23 is fixed to the main body portion 22a. The connection fixing part 23 may be formed of the same material as the main body part 22a, or may be formed of a material (for example, a plastic material or a metal material) different from the main body part 22a. In the case of this embodiment, the connection fixing part 23 consists of a plastic molded part having higher strength than the main body part 22a. As shown in FIG. 5, the connecting and fixing portion 23 connects the main body portion 22 a and the wall portion 14 c so as to pass through the gap S <b> 1. The regulation reflecting member 22 is fixed to the wall portion 14c of the chassis 14 so that the main body portion 22a contacts the end portions 171 and 172 of the LED boards 17 and 17 from the plate surface 17a side. In addition, when the LED board 17 receives heat and expands, the regulation reflecting member 22 has a force that can move the end portions 171 and 172 between the end portions 171 and 172 and the wall portion 14c. It is sandwiched. A slight gap may be formed between the main body portion 22a of the regulation reflecting member 22 and the LED substrate 17 as long as the object of the present invention is not impaired.

  Since the regulation reflecting member 22 protrudes to the light incident surface 19c side from the LED 16, the light incident surface 19c of the light guide plate 19 approaches the LED 16 side when the light guide plate 19 is thermally expanded or the light guide plate 19 is assembled. Even if there is, the regulating reflecting member 22 always comes into contact with the light incident surface 19 c of the light guide plate 19 before the LED 16. Then, the regulation reflecting member 22 acts on the light guide plate 19 so as to push back the light incident surface 19c that is too close. In addition, since the main-body part 22a of the control reflection member 22 of this embodiment consists of an elastic material as mentioned above, when it contacts with the light-incidence surface 19c of the light-guide plate 19, it will be elastically deformed a little. Therefore, the contact between the regulation reflecting member 22 and the light incident surface 19c is relaxed. However, the shape, elastic modulus, etc. of the main body portion 22a are set so that the light incident surface 19c does not come into contact with the LED 16 even if the main body portion 22a of the regulation reflecting member 22 is pushed and elastically deformed by the light guide plate 19. Yes.

  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.

  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 faces (light incident surfaces) 19 c and 19 d 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.

  In the liquid crystal display device 10 according to the present embodiment, the gap S1 between the adjacent LED units LU1 and LU2 and the gap S2 between the adjacent LED units LU3 and LU4 are regulated reflection members 22 and 22, respectively. It is obscured by. In the case of the present embodiment, the main body portion 22a of the regulation reflecting member 22 covers the gaps S1 and S2 from the plate surface 17a side. Therefore, in the liquid crystal display device 10 (illumination device 12) of this embodiment, it is suppressed that the light emitted from each LED 16 enters the gaps S1 and S2 and is absorbed by the gaps S1 and S2. ing. Further, a light reflecting surface 22b is formed on the surface of each regulation reflecting member 22, 22 on the surface facing each light incident surface 19c, 19d of the light guide plate 19. For this reason, of the light emitted from the LED 16, the light traveling toward the gaps S1 and S2 is reflected by the light reflecting surfaces 22b of the regulating reflecting members 22 and 22, and the light reflected by the light reflecting surfaces 22b. Are directed directly or indirectly to the light incident surfaces 19c and 19d. Then, the light reflected by the light reflecting surface 22b enters the light guide plate 19 from the light incident surfaces 19c and 19d at portions facing the gaps S1 and S2. As a result, the amount of light incident on the light incident surface 19c of the portion facing the gap S1 increases, and the amount of light incident on the portion and the surrounding portions (for example, the portion facing the LED 16) are increased. The difference from the amount of light incident on the light incident surface 19c is reduced. Therefore, when the light guide plate 19 is viewed from the front side, a streak-like dark portion is suppressed from appearing on the light guide plate 19 in the front portion of the gap S1. Similarly, with respect to the amount of light incident on the light incident surface 19d of the portion facing the gap S2, the amount of light incident on the light incident surface 19d of the surrounding portion (for example, the portion facing the LED 16) is also similar. When the light guide plate 19 is viewed from the front side in plan view, a streak-like dark part is suppressed from appearing on the light guide plate 19 in the front portion of the gap S1.

  Therefore, the illuminating device 12 of this embodiment is provided with the regulation reflection member 22, and it is suppressed that the brightness nonuniformity originating in each clearance gap S1 and S2 generate | occur | produces in the planar light radiate | emitted from the light-projection surface 19a. Is done. And the liquid crystal display device 10 of this embodiment is provided with the regulation reflection member 22, and it is suppressed that the display nonuniformity originating in each clearance gap S1, S2 generate | occur | produces.

  Further, in the liquid crystal display device 10 (illumination device 12) of the present embodiment, the light reflecting surface 22b included in the regulation reflecting member 22 is a light-reflective coating film (light reflecting film) formed on the surface of the main body portion 22a. Consists of. Thus, when the light reflecting surface 22b is formed from a coating film having light reflectivity, the light reflectance of the light reflecting surface 22b is appropriately changed by appropriately changing the composition of the coating film and the thickness of the coating film. Can be adjusted. In addition, when the light reflecting surface 22b is formed of a light-reflecting coating film, the surface of the main body 22a (the surface facing the light incident surfaces 19c and 19d) is appropriately used regardless of the surface shape of the main body 22a. The light reflecting surface 22b can be provided.

  Further, in the liquid crystal display device 10 (illumination device 12) of the present embodiment, the main body portion 22a of the regulation reflecting member 22 is made of an elastic material. When the main body portion 22a is made of an elastic material, even if the light incident surfaces 19c and 19d of the light guide plate 19 come into contact with the restricting reflecting member 22, the main body portion 22a of the restricting reflecting member 22 is elastically deformed. , 19d are prevented from being damaged by the regulation reflecting member 22. In addition, as an elastic material, the elastic material which exhibits white is preferable. If it consists of such a white elastic material, it will become possible to utilize the surface of the main-body part 22a as the light reflection surface 22b as it is. Further, when a light-reflective coating film is formed on the surface of the main body portion 22a, the white main body portion is exposed from the lower side even if the coating film is peeled off. It can be used as a part.

  Further, in the liquid crystal display device 10 (illumination device 12) of the present embodiment, the main body portion 22a of the regulation reflecting member 22 covers the gaps S1 and S2 in a form that covers all the gaps S1 and S2 in the thickness direction of the light guide plate 19. It has a columnar shape (triangular prism shape) extending along the line. Further, the light reflecting surface 22b of the regulation reflecting member 22 may be disposed on the peripheral surface (side surface) of the main body portion 22a having a triangular prism shape (columnar shape). When the main body 22a has such a configuration, the light from the LED (light source) 16 is reliably suppressed from entering the gaps S1 and S2.

  Further, in the liquid crystal display device 10 (illumination device 12) of the present embodiment, the main body portion 22a of the regulation reflecting member 22 has a gap so that the end portions 171 and 172 of the adjacent LED substrates 17 and 17 can extend. The LED substrates 17 and 17 are arranged in contact with the respective end portions 171 and 172 so as to cover S1 and S2. When the main body portion 22a has such a configuration, even if the main body portion 22a of the regulation reflecting member 22 is arranged so as to cover the gaps S1 and S2, the end portions 171 of the LED substrates 17 and 17 are arranged. 172 is allowed to expand due to the influence of heat or the like.

  Further, the liquid crystal display device 10 (illumination device 12) of the present embodiment includes a plate-like bottom portion 14a arranged so as to cover a plate surface 19b on the back side of the light guide plate 19, and an LED that stands on the periphery of the bottom portion 14a. A chassis 14 having wall portions 14c, 14d arranged outside the substrate 17 is provided, and the regulation reflecting member 22 is fixed in such a manner that the main body portion 22a is connected to the wall portion 14c. The regulation reflecting member 22 has a connecting and fixing portion 23 that connects the main body portion 22a and the wall portions 14c and 14d so as to pass through the gaps S1 and S2. In this manner, the regulation reflecting member 22 is fixed to the wall portions 14c and 14d by using the connection fixing portion 23 that connects the main body portion 22a and the wall portions 14c and 14d so as to pass through the gaps S1 and S2. And the attachment structure of the regulation reflection member 22 is reduced in size and is preferable.

<Embodiment 2>
Next, Embodiment 2 of the present invention will be described with reference to FIGS. 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. 7 is a plan view (top view) of the regulation reflecting member 22A according to the second embodiment, and FIG. 8 is a front view of the regulation reflecting member 22A according to the second embodiment viewed from the LED 16 side of the LED unit LU. . The regulation reflecting member 22A of the present embodiment includes a quadrangular columnar body portion 22Aa that extends along the Z-axis direction and covers the gap S1, and a first light reflecting surface formed on the surface of the body portion 22Aa. 22Ab1, second light reflecting surfaces 22Ab2 and 22Ab2, and a connecting and fixing portion 23A extending along the Y-axis direction for fixing the main body portion 22Aa to the wall portion 14c. The main body 22Aa is made of an elastic material as in the first embodiment.

  The regulation reflecting member 22A of the present embodiment is a surface facing the light incident surface 19c (see FIG. 4 of the first embodiment) in a substantially parallel state among the surface (circumferential surface) of the main body portion 22Aa. The first light reflecting surface 22Ab1 to be formed, and the second light reflecting surfaces 22Ab2 and 22Ab2 formed on the surface adjacent to the first light reflecting surface 22Ab1 and substantially perpendicular to the light incident surface 19c. Yes. The surface of the main body portion 22Aa on which the second light reflecting surface 22Ab2 is formed is not opposed to the light incident surface 19c, but is exposed to the light incident surface 19c side, so that the light from the LED 16 strikes it. ing. Therefore, light reflection surfaces 22Ab1, 22Ab2, and 22Ab2 are formed on at least the surface (circumferential surface) exposed on the light incident surface 19c side of the surface (circumferential surface) of the main body portion 22Aa. Each of the light reflecting surfaces 22Ab1, 22Ab2, 22Ab2 is made of a light reflecting film as in the first embodiment. A light reflecting surface is not formed on the back surface 22Aa1 of the main body 22Aa. In other embodiments, a light reflecting surface (light reflecting film) may also be formed on the back surface 22Aa1.

<Embodiment 3>
Next, Embodiment 3 of the present invention will be described with reference to FIGS. 9 and 10. FIG. 9 is a plan view (top view) of the regulation reflecting member 22B according to the third embodiment, and FIG. 10 is a front view of the regulation reflecting member 22B according to the third embodiment as viewed from the LED 16 side of the LED unit LU. . The regulation reflecting member 22B of the present embodiment has a trapezoidal cross section, extends along the Z-axis direction, and is disposed on the surface of the main body 22Ba. The first light reflecting surface 22Bb1, the second light reflecting surface 22Bb2, and 22Bb2, and the connecting and fixing portion 23B extending along the Y-axis direction for fixing the main body portion 22Aa to the wall portion 14c. Unlike the first embodiment, the main body 22Ba of the present embodiment is made of metal (for example, an aluminum-based material). Each light reflecting surface 22Bb1, 22Bb2, 22Bb2 is made of the surface of the main body 22Ba itself. The surface of the main body portion 22Ba is polished to enhance light reflectivity. As described above, the surface of the main body 22Ba itself may be used as the light reflecting surfaces 22Bb1, 22Bb2, and 22Bb2. In other embodiments, a light-reflective coating film (light-reflecting film) similar to that of the first embodiment is formed on the surface of the metal main body 22Ba, and the surface of the coating film is a light-reflecting surface. It may be used as

  In addition, the portion of the regulation reflecting member 22B that is closest to the light reflecting surface 19c side (the portion where the light reflecting surface 22Bb1 is formed) has a planar shape. Therefore, even if the main body portion 22Ba (light reflecting surface 22Bb1) of the regulation reflecting member 22B comes into contact with the light incident surface 19c, the contact portion is flat, so that the contact with the light incident surface 19c is relaxed, It is suppressed that the light incident surface 19c is damaged by the regulation reflecting member 22B.

<Embodiment 4>
Next, Embodiment 4 of the present invention will be described with reference to FIGS. 11 and 12. FIG. 11 is a plan view (top view) of the regulation reflecting member 22C according to the fourth embodiment, and FIG. 12 is a front view of the regulation reflecting member 22C according to the fourth embodiment as viewed from the LED 16 side of the LED unit LU. . The regulation reflecting member 22C of the present embodiment has a pentagonal cross section, extends along the Z-axis direction, and is arranged on the surface of the main body portion 22Ca so as to cover the gap S1. First light reflecting surfaces 22Cb1, 22Cb1, second light reflecting surfaces 22Cb2, 22Cb2, and a connecting and fixing portion 23C extending along the Y-axis direction for fixing the main body portion 22Ca to the wall portion 14c. The main body portion 22Ca of the present embodiment is made of an elastic material as in the first embodiment. As shown in FIG. 11, the main body 22Ca has a pentagonal shape (cross-sectional shape) when viewed from the front side. This cross-sectional shape is a shape in which a front-side isosceles triangular cross-sectional portion and a rear-side quadrangular (rectangular) cross-sectional portion are combined. First light reflecting surfaces 22Cb1 and 22Cb1 are formed on a portion of the surface (circumferential surface) of the main body 22Ca facing the light incident surface 19c. The first light reflecting surfaces 22Cb1 and 22Cb1 have a cross section on the front side arranged in an isosceles triangular portion. Further, second light reflecting surfaces 22Cb2 and 22Cb2 are formed in a portion of the surface (circumferential surface) of the main body portion 22Ca that is substantially perpendicular to the light incident surface 19c. The second light reflecting surfaces 22Cb2 and 22Cb2 have end faces on the rear side of the isosceles triangular portion, and the cross section is arranged on the quadrangular portion.

  The main body portion 22Ca of the present embodiment is made of an elastic material as in the first embodiment. And each light reflection surface 22Cb1, 22Cb2 formed in the surface of main-body part 22Ca consists of a light reflection film. However, this light reflecting film is made of the same material as the light reflecting film formed on the plate surface (mounting surface) 17 a of the LED substrate 17. The light reflectance of each of the reflection surfaces 22Cb1 and 22Cb2 is set to be the same as that of the light reflection film formed on the plate surface 17a. Thus, when the light reflecting surfaces 22Cb1 and 22Cb2 of the regulation reflecting member 22C have the same light reflectance as the light reflecting film on the plate surface (mounting surface) 17a, the light reflected by the plate surface (mounting surface) 17a. And variations in brightness between the light reflected by the light reflecting surfaces 22Cb1 and 22Cb2 of the regulating reflecting member 22C can be suppressed.

<Embodiment 5>
Next, Embodiment 5 of the present invention will be described with reference to FIGS. 13 and 14. FIG. 13 is a plan view (top view) of the regulation reflecting member 22D according to the fifth embodiment, and FIG. 14 is a front view of the regulation reflecting member 22D according to the fifth embodiment viewed from the LED 16 side of the LED unit LU. . The regulation reflecting member 22D of the present embodiment has a columnar (semi-cylindrical) main body portion 22Da that is semicircular in cross section and extends along the Z-axis direction and covers the gap S1, and the main body 22Da. The light reflection surface 22Db disposed on the surface (circumferential surface) of the portion 22Da and the connection fixing portion 23D extending along the Y-axis direction for fixing the main body portion 22Da to the wall portion 14c. The main body 22Da of the present embodiment is made of a metal material as in the third embodiment. As shown in FIG. 13, the main body 22 </ b> Da has a semicircular shape in which a circular arc portion is disposed on the light incident surface 19 c side when viewed in plan from the front side (cross-sectional shape). The light reflecting surface 22Db is made of a light reflecting film formed on the surface (circumferential surface) of the main body 22Da facing the light incident surface 19c.

  In the present embodiment, the light reflecting surface 22Db of the regulation reflecting member 22D has a curved surface at a portion facing the light incident surface 19c. As described above, when the light incident surface 19c has a curved surface shape, even if the main body portion 22Da of the regulation reflecting member 22D contacts the light incident surface 19c, the contact portion has a curved surface shape. The contact with the surface 19c is relaxed, and the light incident surface 19c is prevented from being damaged.

<Embodiment 6>
Next, Embodiment 6 of the present invention will be described with reference to FIGS. 15 and 16. FIG. 15 is a plan view (top view) of the regulation reflecting member 22E according to Embodiment 6, and FIG. 16 is a front view of the regulation reflecting member 22E according to Embodiment 6 viewed from the LED 16 side of the LED unit LU. . When viewed from the front side (plate surface 17a side), the regulation reflecting member 22E of the present embodiment has an elliptical shape and is disposed on the surface of the main body portion 22Ea. The first light reflecting surface 22Eb1, the second light reflecting surface 22Eb2, and a connecting and fixing portion 23E extending along the Y-axis direction for fixing the main body portion 22Ea to the wall portion 14c. Although the main body portion 22Ea of the present embodiment is arranged so as to cover the gap S1 from the plate surface 17a side, the gap S1 is slightly exposed. However, most of the gap S1 is covered with the main body 22Ea. The main body portion 22Ea has a flat elliptic columnar shape arranged along the thickness direction (Y-axis direction) of the LED substrate 17.

  In each embodiment mentioned above, each main-body part has covered and concealed the clearance gap S1. On the other hand, in the present embodiment, the gap S1 is slightly exposed from around the main body portion 22Ea. As described above, there is no problem as long as the main body portion 22Ea of the regulation reflecting member 22E covers most of the gap S1. In addition, 80% or more is preferable, 90% or more is more preferable, and the range covered with the main-body part 22Ea of the regulation reflection member 22E among clearance gap S1 is still more preferable 95% or more. If at least 80% or more of the gap S1 is covered with the main body 22Ea, it is possible to suppress the occurrence of luminance unevenness derived from the gap S1 in the lighting device. Note that the main body portion 22Ea of the present embodiment is made of an elastic material as in the first embodiment. Further, each of the light reflecting surfaces 22Eb1 and 22Eb2 is made of a light reflecting film formed on the surface of the main body portion 22Ea as in the first embodiment.

<Embodiment 7>
Next, Embodiment 7 of the present invention will be described with reference to FIG. FIG. 17 is a front view of the regulation reflecting member 22F according to the seventh embodiment when viewed from the LED 16 side of the LED unit LU. The regulation reflecting member 22F of the present embodiment includes a main body 22Fa and light reflecting surfaces 22Fb and 22Fb. The configurations of the main body 22Fa and the light reflecting surface 22Fb are the same as those in the first embodiment. However, in the case of this embodiment, the method of fixing the regulation reflecting member 22F is different from that of the first embodiment. The regulation reflecting member 22F is fixed to the bottom portion 14a of the chassis 14 using the fixing portion 23F.

  As in the first embodiment, the illuminating device of the present embodiment includes a chassis 14 having a plate-like bottom portion 14 a disposed so as to cover a plate surface 19 b on the back side of the light guide plate 19. Further, a through-hole mounting hole 240 is provided at a predetermined portion of the bottom portion 14a. The fixing portion 23F described above has an elongated rod shape, and one end thereof is fixed to the main body portion 22Fa. The one end of the fixing portion 23F is fixed to the bottom surface side of the main body portion 22Fa. Note that the bottom surface of the main body 22Fa is in contact with the bottom 14a of the chassis 14. The fixing portion 23F is inserted into the attachment hole 240 provided in the bottom portion 14a from the other end side. The regulation reflecting member 22F is fixed to the bottom portion 14a when the fixing portion 23F is inserted into the mounting hole 240. As in the present embodiment, the regulation reflecting member 22F may be fixed such that the main body portion 22Fa is connected to the bottom portion 14a. As described above, when the regulation reflecting member 22F is fixed to the bottom portion 14a, the size of the fixing portion 23F can be set regardless of the size of the gap S1. However, from the viewpoint of downsizing the regulation reflecting member mounting structure, as described above, the mounting structure according to the first embodiment that uses the connection fixing portion 23 or the like that allows the clearance S1 to pass through is more preferable.

<Eighth embodiment>
Next, an eighth embodiment of the present invention will be described with reference to FIG. FIG. 18 is a plan view (top view) of the regulation reflecting member 22G according to the eighth embodiment. The lighting device of this embodiment includes a heat dissipation member 18 inside the chassis 14. Each LED unit LU1, LU2 is fixed to a front surface 18a of the heat radiating member 18. The heat radiating member 18 has a plate shape extending along the longitudinal direction (X-axis direction) of the LED substrate 17. The heat radiating member 18 is made of a metal material having high thermal conductivity (for example, an aluminum-based material) processed into a predetermined shape, and is fixed to the bottom portion 14 a of the chassis 14. The heat dissipating member 18 has a function of receiving heat generated as the LED 16 is turned on from each of the LED units LU1 and LU2 and moving the received heat to the bottom 14a of the chassis 14 to dissipate heat. The plate surface 18 b on the back side of the heat radiating member 18 faces the wall portion 14 c of the chassis 14.

  The regulation reflecting member 22G of the present embodiment is made of metal, has a triangular prism-shaped main body portion 22Ga extending along the Z-axis direction so as to cover the gap S1, and a light reflecting film formed on the surface of the main body portion 22Ga. The light reflecting surfaces 22Gb and 22Gb, and a rod-like connecting and fixing portion 23G extending along the Y-axis direction for fixing the main body portion 22Ga to the heat radiating member 18 are provided. The heat dissipating member 18 is provided with a penetrating attachment hole 340. The regulation reflection member 22G is fixed to the heat dissipation member 18 in such a manner that the connection fixing portion 23G is inserted into the attachment hole 340. In addition, the connection fixing | fixed part 23G passes between each edge part 171 and 172 (namely, clearance gap S1) of each LED board 17 and 17 which adjoins, and the main-body part 22Ga of the control reflection member 22G, the heat radiating member 18, and Is connected.

  As in the present embodiment, the lighting device includes the heat dissipation member 18 disposed on the opposite side of the mounting surface 17a of the LED substrate 17, and the main body portion 22Ga of the regulation reflection member 22G is fixed in a form connected to the heat dissipation member 18. It may be done. When the regulation reflecting member 22G is fixed in a form connected to the heat radiating member 18, the heat received by the regulation reflecting member 22G can be moved to the heat radiating member 18 and released.

<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, the light reflecting surface is formed on the surface exposed to the light incident surface side of the light guide plate among the surfaces of the main body portion of the regulation reflecting member. A light reflecting surface may be formed on all surfaces of the main body.

  (2) In the above embodiment, the main body portion of the regulation reflecting member is formed of an elastic material or a metal material. However, in other embodiments, as long as the object of the present invention can be achieved, for example, a plastic material or the like is used. It may be formed from other materials.

  (3) In Embodiments 3, 5, and 8 described above, the main body portion of the regulation reflecting member is formed from a metal material. However, in other embodiments, an elastic material may be used instead of the metal material.

  (4) There may be one connection fixing part (fixing part) provided in the main body part of the regulation reflecting member, or two or more.

  (5) In the above embodiment, two LED substrates are assigned to one LED row (light source row). However, in other embodiments, three or more LED substrates are provided for one LED row. It may be assigned. That is, two or more gaps (gap formed between adjacent LED substrates) may be formed for one LED row.

  (6) In the above-described embodiment, an example in which an LED is used as a light source has been exemplified. However, in other embodiments, a light source other than an LED may be used.

  (7) 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.

  (8) In the above embodiment, the liquid crystal panel and the chassis are illustrated in a vertically placed state in which the short side direction coincides with the vertical direction, but the liquid crystal panel and chassis coincide with the long side direction in the vertical direction. What was made into the vertically placed state made into the above is also contained in this invention.

  (9) 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.

  (10) 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 is also applicable to a display device using another type of display panel.

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

  DESCRIPTION OF SYMBOLS 10 ... Liquid crystal display device (display apparatus), 11 ... Liquid crystal panel (display panel), 12 ... Illuminating device, 13 ... Bezel, 14 ... Chassis, 14a ... Bottom part, 14c, 14d, 14e, 14f ... Wall part, 15 ... Optical Sheet (optical member), 16 ... Light source (LED), 17 ... LED substrate (light source substrate), 18 ... Heat dissipation member, 19 ... Light guide plate, 19a ... Front side plate surface (light emitting surface), 19b ... Back side plate surface 19c, 19d ... light incident surface, 20 ... reflective sheet, 21 ... frame, 22 ... regular reflecting member, 22a ... main body part, 22b ... light reflecting surface, 23 ... connection fixing part, S1, S2 ... gap, LU ... LED Unit (light source unit), TV ... TV receiver

Claims (15)

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 boards arranged in a row so that a gap is formed between the parts;
It is arranged between the light source substrate and the light incident surface so as to cover the gap, and has a shape protruding to the light incident surface side from the light source, and the interval between the light source and the light incident surface is set. An illuminating device comprising: a regulating main body part; and a regulating reflecting member having a light reflecting surface that is disposed on a surface of the main body part and reflects light toward the light incident surface.   The lighting device according to claim 1, wherein the light reflecting surface is formed of a surface of a coating film having light reflectivity formed on a surface of the main body.   The lighting device according to claim 1, wherein the main body portion is made of an elastic material.   The said main-body part comprises the column shape extended along the thickness direction of the said light-guide plate in the form which covers all the said clearance gaps, and the said light reflection surface is distribute | arranged to the surrounding surface of the said main-body part which makes a column shape. Item 4. The lighting device according to any one of Items 3.   The said main-body part is a contact arrangement | positioning at each edge part of the said light source board | substrate in the form which covers the said clearance gap so that each edge part of the said adjacent light source board | substrate can extend | expand. The lighting device according to one item. The mounting surface has an insulating light reflecting film,
The lighting device according to claim 1, wherein the light reflecting surface has the same light reflectance as that of the light reflecting film.   The lighting device according to claim 1, wherein the main body portion is made of a metal material, and the light reflecting surface is a surface of the main body portion.   The illumination device according to claim 7, wherein the light reflecting surface has a curved surface or a flat surface at a portion facing the light incident surface. Comprising a chassis having a plate-like bottom portion arranged so as to cover the plate surface on the back side of the light guide plate, and a wall portion standing on the periphery of the bottom portion and arranged outside the light source substrate;
The lighting device according to any one of claims 1 to 8, wherein the regulation reflecting member is fixed in a form in which the main body portion is connected to the wall portion.   The lighting device according to claim 9, wherein the regulation reflection member includes a connection fixing portion that connects the main body portion and the wall portion so as to pass through the gap. A chassis having a plate-like bottom portion arranged in a form to cover the back surface of the light guide plate;
The lighting device according to any one of claims 1 to 8, wherein the regulation reflecting member is fixed in a form in which the main body portion is connected to the bottom portion. A heat dissipating member disposed on the opposite side of the mounting surface of the light source substrate;
The lighting device according to any one of claims 1 to 8, wherein the regulation reflection member is fixed in a form in which the main body portion is connected to the heat dissipation member.   A display device comprising: the illumination device according to any one of claims 1 to 12; and a display panel that performs display using light from the illumination device.   The display device according to claim 13, 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 13 or 14.

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