JP2013218055A - Display device and television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device that suppresses occurence of uneven luminance resulting from light being incident from an edge of a display panel in a display area.SOLUTION: A display device 10 according to the present invention comprises: a light source 17; a display panel 11 that includes a display surface 11c containing a display area 11c1 and a non-display area 11c2; a light guide plate 16 that includes a light incident surface 16b which light from the light source 17 enters and a light emergent surface 16a which emits light incident from the light incident surface 16b toward a rear surface 11d of the display panel 11; and a light source support member 19 that includes a support part 19a supporting the light source 17 so as to face the light incident surface 16b while keeping a gap with respect to the light incident surface 16b and such that the light source 17 is arranged in the gap, and a protrusion part 19c protruding from an edge 19a1 of the support part 19a provided in a display panel 11 side toward a light incident surface 16b side and is provided between the display panel 11 and the light guide plate 16 so as to cover a portion 16a2 overlapping with a non-display area 11c2 of the light emergent surface 16a.

Description

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

  Liquid crystal panels are widely used in display devices such as televisions, mobile phones, and portable information terminals. Since the liquid crystal panel cannot emit light by itself, the light of an illumination device (so-called backlight device) is used to display an image. This illuminating device is arranged on the back side of the liquid crystal panel and is configured to emit planar light toward the back side of the liquid crystal panel.

  As the illuminating device, as disclosed in Patent Document 1, a device including a light guide plate and a light source arranged to face an end surface of the light guide plate is known. This type of lighting device is generally known as a side light type (or edge light type), and the end surface of the light guide plate is a light incident surface on which light emitted from a light source is incident, The front surface of the light guide plate is a light emitting surface that emits light toward the back surface of the liquid crystal panel.

  The liquid crystal panel is sandwiched between a metallic frame-like member that covers the peripheral edge on the front side and a plastic frame-like member that has a light-shielding property that is directed to the peripheral edge on the back (back) side. In this state, it is arranged on the light exit surface side of the illumination device.

  By the way, in recent years, a display device having a configuration in which the above-described frame-shaped member disposed on the back side of the liquid crystal panel is omitted has been proposed due to a demand for thinning and the like. In this type of display device, the liquid crystal panel is installed on the front surface of the light guide plate.

JP 2010-177190 A JP 2011-129440 A

  In a display device in which the frame-like member disposed on the back side of the liquid crystal panel is omitted, light emitted from the light source enters the liquid crystal panel from the end surface (periphery) of the liquid crystal panel. When light enters from the end face of the liquid crystal panel, a portion (bright portion) in which the luminance is excessively high is generated in the display area of the liquid crystal panel in the vicinity of the liquid crystal panel, which causes luminance unevenness of the liquid crystal panel. For example, even when the liquid crystal panel displays black, if light enters from the end face of the liquid crystal panel, luminance unevenness occurs in the display area, which is a problem.

  An object of the present invention is to provide a display device and the like in which occurrence of luminance unevenness in a display region due to light entering from an end face of a display panel is suppressed.

  A display device according to the present invention is disposed on the back side, a display panel having a light source, a display area and a display surface including a non-display area surrounding the display area, and a back surface opposite to the display surface. A plate-shaped member comprising a light incident surface formed by an end surface of the plate-shaped member and light incident from the light source; and a light incident from the light incident surface formed by a front-side plate surface of the plate-shaped member. A light guide plate having a light emitting surface that emits light toward the back surface, and facing the light incident surface while maintaining a gap, and supporting the light source so that the light source is disposed within the gap The display panel extends to the light incident surface side from a support portion and an end of the support portion arranged on the display panel side, and covers the portion of the light emission surface that overlaps the non-display area. And an overhang portion disposed between the light guide plate and the light guide plate. Comprising a light source supporting member that, a. In the display device, a light guide plate is disposed on the back side of the display panel. The light source is supported by a light source support member so as to face the light incident surface of the light guide plate. The light source support member has a support portion that supports the light source so as to face the light incident surface while maintaining a space and to arrange the light source within the space. In addition, the light source support member projects from the end of the support portion disposed on the display panel side to the light incident surface side, and covers a portion of the light emitting surface that overlaps the non-display area. It has an overhang part arranged between the display panel and the light guide plate. By providing such an overhanging portion, the light emitted from the light source is prevented from traveling directly toward the end portion (end surface) of the display panel, and the portion of the light emitting surface ( Light is suppressed from being emitted from the light emission surface toward the end portion (end surface) of the display panel from a portion overlapping the non-display area. As a result, in the display device, it is possible to prevent light from entering the display panel from the end portion (end surface) of the display panel and causing luminance unevenness in the display area of the display surface.

  In the display device, the light emitted from the light emitting surface is interposed between the display panel and the light guide plate so that the end portion is disposed on the inner side (display area side) than the projecting portion. The optical sheet which permeate | transmits toward the back surface of the said display panel may be provided. In the display device, when the optical sheet is provided, the projecting portion suppresses light from entering the optical sheet from the end portion and causing unevenness in luminance in the display area of the display surface. The

  The display device may include a reflective member that is attached to a surface of the protruding portion on a side facing the light source and reflects light from the light source. In the display device, when the reflection member is provided, the light that has been directly directed to the display panel side among the light emitted from the light source is reflected by the reflection member and is incident on the light incident surface. Will be returned to the other side. Therefore, in the display device, the efficiency of causing the light emitted from the light source to enter the light incident surface can be increased by the reflecting member.

  In the display device, the projecting portion may be disposed between the display panel and the light guide plate so as not to cover a portion of the light exit surface that overlaps the display region. In the display device, when the projecting portion is disposed between the display panel and the light guide plate so as not to cover a portion of the light emitting surface that overlaps the display region, The protruding portion is prevented from entering the display area. As a result, the overhanging portion is prevented from entering the display area and forming a dark portion.

  In the display device, the light source support member is preferably made of a metal material. In the display device, when the light source support member is made of a metal material, the light source support member is excellent in thermal conductivity (heat dissipation).

  The display device may include a metal chassis that faces the plate surface on the back side of the light guide plate and is connected to the support portion. In the display device, when the chassis is provided, the heat generated from the light source can be received by the support unit and further moved to the chassis. Therefore, in the display device, heat generated from the light source can be efficiently radiated (cooled) using the chassis.

  In the display device, the light source support member extends outward from an end portion of the support portion disposed on the chassis side, contacts the chassis, receives heat generated from the light source, and receives the heat to the chassis. You may have the 1st thermal radiation part to move. In the display device, when the light source support member has the first heat radiating portion, the heat received by the support portion from the light source is easily transferred to the chassis. Therefore, the display device can further efficiently radiate (cool) the heat generated from the light source.

  In the display device, a frame-like facing portion that covers from the display surface side of the display panel so as to face the display area, and extends from a periphery of the facing portion toward the chassis side, and is connected to the chassis The light source support member extends from the first heat radiating portion toward the facing portion and contacts the peripheral wall portion to generate heat generated from the light source. You may have a 2nd thermal radiation part which receives and moves to the said flame | frame. In the display device, the frame includes the light source support member having the second heat radiating portion, and the heat received by the support portion from the light source is utilized by the second heat radiating portion. The frame can also be moved. As a result, the display device can further efficiently dissipate (cool) the heat generated from the light source.

  In the display device, the overhanging portion is inclined so as to rise from the inner side (display region side) toward the support portion side (non-display region side), and a gap into which an end portion of the optical sheet can be inserted. An inclined surface formed between the display panel and the back surface may be included. In the display device, when the projecting portion includes the inclined surface, even when the end portion of the optical sheet moves outward when the optical sheet is thermally expanded or displaced, The end of the optical sheet is inserted into the gap formed between the inclined surface and the display panel. Therefore, in the display device, the end portion of the optical sheet is pushed back to the projecting portion, and deformation of the optical sheet such as bending or wrinkle is suppressed.

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

  A television receiver according to the present invention comprises the display device.

  ADVANTAGE OF THE INVENTION According to this invention, the display apparatus etc. with which it was suppressed that the brightness | luminance nonuniformity generate | occur | produces in a display area when light injects from the end surface of a display panel can be provided.

1 is an exploded perspective view showing a schematic configuration of a television receiver TV according to Embodiment 1 of the present invention. Rear view of TV receiver TV Exploded perspective view showing a schematic configuration of a liquid crystal display unit LDU constituting the liquid crystal display device A-A 'line sectional view of a liquid crystal display device 4 is an enlarged cross-sectional view of the liquid crystal display device shown in FIG. Enlarged sectional view of the liquid crystal display device according to Embodiment 2 FIG. 4 is an enlarged cross-sectional view of a liquid crystal display device according to Embodiment 3. Enlarged sectional view of a liquid crystal display device according to Embodiment 4

<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to FIGS. In this embodiment, the television receiver TV and the liquid crystal display device 10 are illustrated. Each drawing shows an X-axis, a Y-axis, and a Z-axis, and the directions of the axes are drawn in common directions in the drawings. Moreover, let the upper side shown by FIG.3 and FIG.4 be a front side (display surface side), and let the lower side of the figure be a back side (back side).

  FIG. 1 is an exploded perspective view showing a schematic configuration of a television receiver TV according to Embodiment 1 of the present invention, and FIG. 2 is a rear view of the television receiver TV. As shown in FIG. 1, the television receiver TV according to this embodiment includes a liquid crystal display unit LDU, various substrates PWB, MB, and CTB attached to the back side (back side) of the liquid crystal display unit LDU, and a liquid crystal display. On the back side of the unit LDU, a cover member CV attached to cover the various substrates PWB, MB, and CTB and a stand ST are provided. The liquid crystal display unit LDU is supported by the stand ST so that the display surface 11c is along the vertical direction (Y-axis direction).

  The liquid crystal display device 10 according to the present embodiment is configured by removing at least a configuration for receiving a television signal (such as a tuner portion of the main board MB) from the television receiver TV having the above-described configuration. The liquid crystal display unit LDU has a horizontally long rectangular shape as a whole, and includes a liquid crystal panel 11 as a display panel and a backlight device (illumination device) 12 as an external light source, which are external appearances of the liquid crystal display device 10. It is the structure hold | maintained integrally by the flame | frame 13 and chassis 14 which comprise this.

  On the back surface of the chassis 14 constituting the external appearance of the back side of the liquid crystal display device 10, as shown in FIG. 2, two stand mounting members STA extending along the Y-axis direction are spaced apart in the X-axis direction. A pair is attached. These stand attachment members STA have a substantially channel shape with a cross-sectional shape opened on the surface on the chassis 14 side, and a pair of support columns STb in the stand ST are inserted into a space formed between the stand 14 and the chassis 14. It is configured as follows. In addition, the wiring member (electric wire etc.) connected to the LED board 18 which the backlight apparatus 12 has passes through the space in the stand attachment member STA. The stand ST includes a pedestal portion STa that extends along the X-axis direction and the Z-axis direction, and a pair of support columns STb that rise from the pedestal portion STa along the Y-axis direction. The cover member CV is made of synthetic resin, and is attached so as to cover the lower half (see FIG. 2) on the back surface of the chassis 14 while traversing the pair of stand attachment members STA in the X-axis direction. Between the cover member CV and the chassis 14, a space capable of accommodating components such as various substrates PWB, MB, and CTB described later is formed.

  As shown in FIG. 2, the various substrates PWB, MB, CTB include a power supply substrate PWB, a main substrate MB, and a control substrate CTB. The power supply substrate PWB is a power supply source of the liquid crystal display device 10 and supplies driving power to the other substrates MB and CTB, the LEDs 17 included in the backlight device 12, and the like. The main board MB has a tuner section (not shown) that can receive a television signal and an image processing section (not shown) that performs image processing on the received television signal, and sends the processed image signal to the control board CTB. Output. The main board MB receives an image signal from the image reproduction device when the liquid crystal display device 10 is connected to an external image reproduction device (not shown). The processed signal is output to the control board CTB. The control board CTB has a function of converting an image signal input from the main board MB into a liquid crystal driving signal and supplying the converted liquid crystal driving signal to the liquid crystal panel 11.

  3 is an exploded perspective view showing a schematic configuration of a liquid crystal display unit LDU constituting the liquid crystal display device 10, FIG. 4 is a cross-sectional view taken along the line AA ′ of the liquid crystal display device 10, and FIG. 4 is an enlarged cross-sectional view of the liquid crystal display device 10 shown in FIG. As shown in FIGS. 3 to 5, the liquid crystal display unit LDU constituting the liquid crystal display device 10 includes a frame (front frame) 13 whose main components are arranged on the front side and a chassis arranged on the back side. (Rear chassis) 14 is sandwiched between. Major components sandwiched between the frame 13 and the chassis 14 include at least a liquid crystal panel 11, an optical member 15, a light guide plate 16, an LED unit (light source unit) LU, a light source support member 19, A reflection sheet 20 is included. Among these, the liquid crystal panel 11, the optical member 15, the light guide plate 16, and the reflection sheet 20 are held in a state where they are sandwiched between the front frame 13 and the back chassis 14 in a stacked state. . The backlight device 12 mainly includes an optical member 15, a light guide plate 16, an LED unit LU, a light source support member 19, a chassis 14, and a reflection sheet 20. The LED unit LU is disposed between the frame 13 and the chassis 14 so as to extend along the end faces 16b and 16c on the long side of the light guide plate 16. The LED unit LU includes an LED (LED light source) 17 that is a light source, and an LED substrate (light source substrate) 18 on which the LED 17 is mounted. The LED unit LU is used while being supported by a light source support member (heat radiating member) 19.

  As shown in FIG. 3 and the like, the liquid crystal panel 11 has a horizontally long rectangular shape when seen in a plan view. The liquid crystal panel 11 has a configuration in which a pair of glass substrates 11a and 11b having excellent translucency are bonded together with a predetermined gap therebetween, and liquid crystal is sealed between the substrates 11a and 11b. Yes. Of the pair of substrates 11a and 11b, the front side (display surface 11c side) is a color filter (hereinafter referred to as CF) substrate 11a, and the back side (rear surface 11d side) is an array substrate 11b. The array substrate 11b is provided with a switching element (for example, a thin film transistor: TFT) connected to a source wiring and a gate wiring orthogonal to each other, a pixel electrode connected to the switching element, an alignment film, and the like. . Specifically, a large number of TFTs and pixel electrodes are arranged side by side on the array substrate 11b, and a large number of TFTs and pixel electrodes are arranged around the TFTs and pixel electrodes so as to surround a gate wiring and a source wiring in a lattice shape. It is installed. The gate wiring and the source wiring are connected to the gate electrode and the source electrode of the TFT, respectively, and the pixel electrode is connected to the drain electrode of the TFT. The array substrate 11b is provided with capacitor wirings (auxiliary capacitor wirings, storage capacitor wirings, Cs wirings) that are parallel to the gate wirings and overlap the pixel electrodes in plan view. Are arranged alternately in the Y-axis direction. On the other hand, the CF substrate 11a has a CF in which colored portions such as R (red), G (green), and B (blue) are arranged in a predetermined arrangement, and a lattice frame shape that is arranged so as to partition each CF. A light-shielding black matrix (hereinafter referred to as BM) is provided. A counter electrode, an alignment film, and the like are provided so as to cover each CF and BM. A polarizing plate (not shown) is disposed outside each of the substrates 11a and 11b.

  Of the pair of substrates 11a and 11b constituting the liquid crystal panel 11, the array substrate 11b is set to have a larger size in plan view than the CF substrate 11a, as shown in FIGS. The array substrate 11b is arranged in such a manner that its end protrudes outward from the end of the CF substrate 11a. Specifically, the array substrate 11b is formed to be slightly larger than the CF substrate 11a so that its outer peripheral end protrudes outside the outer peripheral end of the CF substrate 11a over the entire periphery. Of the pair of long-side end portions constituting the outer peripheral end portion of the array substrate 11b, the long-side end portion on the control substrate CTB side (front side shown in FIG. 3, left side shown in FIG. 4) in the Y-axis direction Are provided with a plurality of source side terminal portions (not shown) routed from the source wiring described above. As shown in FIG. 3, a flexible substrate 211 is connected to each source side terminal portion. A plurality of flexible substrates 211 are intermittently arranged in the X-axis direction (that is, the direction along the long side end of the array substrate 11b). Each flexible substrate 211 protrudes outward (Y-axis direction) from the end on the long side of the array substrate 11b.

  On the other hand, among the pair of short side end portions constituting the outer peripheral end portion of the array substrate 11b, one of the short side end portions (left side shown in FIG. 3) has the above-described gate wiring and capacitance wiring. A plurality of gate-side terminal portions (not shown) routed from are provided. A flexible substrate 111 is connected to each gate side terminal portion. A plurality of flexible substrates 111 are intermittently arranged in the Y-axis direction (that is, the direction along the short side end of the array substrate 11b). Each flexible substrate 111 has a shape that protrudes outward (X-axis direction) from the short-side end of the array substrate 11b.

  The flexible substrate 211 on the source side includes a film-like base material made of a synthetic resin material (for example, polyimide resin) having insulating properties and flexibility, and a source driver (IC for driving a liquid crystal) mounted on the base material. Chip, an example of a driving component) 212. The source driver 212 is disposed on the back side (FIGS. 3 and 4) of the flexible substrate 211. A large number of wiring patterns (not shown) are formed on the base material of the flexible substrate 211, and a source driver 212 mounted near the center of the base material is connected to the wiring patterns. The wiring pattern is a conductive path made of a metal film such as a copper foil, and is appropriately formed on the base material of the flexible substrate 211 using a known technique.

  In the case of the present embodiment, the flexible substrate 211 on which the driver 212 is mounted is configured by so-called SOF (System on Film). One end of the flexible substrate 211 is pressure-bonded to the source terminal portion of the array substrate 11b via an anisotropic conductive film (ACF). The other end is crimped and connected to a terminal portion (not shown) of the source-side printed board (source board) 213 via an anisotropic conductive film (ACF). The printed circuit board 213 and the array substrate 11b (liquid crystal panel 11) are structurally and electrically connected to each other via the flexible substrate 211. The printed board (source board) 213 is connected to the control board CTB described above via a wiring member (FPC: flexible printed board) (not shown). The printed circuit board 213 supplies signals (scanning signal to the gate wiring, data signal to the source wiring, capacitance signal to the capacity wiring, etc.) input from the control board CTB to the liquid crystal panel 11 side through the flexible substrate 211. To do. The printed circuit board 213 has a long shape (band shape). In the case of this embodiment, two printed boards 213 are used, and these are connected to the respective flexible boards 211 so as to be aligned with each other. The length of one printed circuit board 213 in the longitudinal direction is set to about half the long side of the liquid crystal panel 11. Further, the length of the printed board 213 in the short direction is longer than the thickness of the light guide plate 16 (the length of the light guide plate 16 in the Z-axis direction) due to the wiring pattern formed on the printed board 213 and the like. ing.

  One end of the gate-side flexible substrate 111 is pressure-bonded to the gate-side terminal portion of the array substrate 11b via an anisotropic conductive film (ACF). The flexible substrate 111 is made of SOF, like the source-side flexible substrate 211. A gate driver (IC chip) 112 is mounted on the flexible substrate 111. The gate driver 112 is disposed on the back side (FIG. 3) of the flexible substrate 111. The array substrate 11b is formed with a relay wiring (not shown) connecting the source side terminal portion and the gate side terminal portion. A signal (scanning signal to the gate wiring, capacitance signal to the capacitance wiring, etc.) input from the control substrate CTB is supplied to the gate side terminal portion and the flexible substrate 111 via the relay wiring. With such a configuration, the liquid crystal panel 11 displays an image on the display surface 11c based on a signal input from the control board CTB.

  As shown in FIGS. 3 to 5, the liquid crystal panel 11 is placed on the front side (light emitting side) of the optical member 15 to be described later. The plate surface (rear surface 11 d) on the back side of the liquid crystal panel 11 is in close contact with the optical member 15 with almost no gap. This prevents dust and the like from entering between the liquid crystal panel 11 and the optical member 15. The display surface (front plate surface) 11c of the liquid crystal panel 11 has a rectangular display area 11c1 on the center side of the screen where images can be displayed, and a frame shape (around the display area on the outer peripheral edge side of the screen). Frame-like non-display area 11c2. In addition, each terminal part and each flexible substrate 111, 211 described above are arranged in the non-display area 11c2.

  As shown in FIG. 3, the optical member 15 has a horizontally long rectangular shape in plan view, like the liquid crystal panel 11. The size (short side dimension and long side dimension) of the optical member 15 is set larger than the display area 11 c 1 of the liquid crystal panel 11. However, the optical member 15 is set slightly smaller than the entire liquid crystal panel 11. The optical member 15 is placed so as to be laminated on the front side (light emitting side) of the light guide plate 16 described later, and is disposed in a state of being sandwiched between the liquid crystal panel 11 and the light guide plate 16. The optical member 15 is sized to fit within the front surface 16 a of the light guide plate 16. The optical member 15 is formed by stacking three sheet-like members. Specific examples of the optical member 15 include a diffusion sheet, a lens sheet, a reflective polarizing sheet, and the like, and those appropriately selected from these are used. The optical member 15 transmits light emitted from the front surface (light emitting surface) 16a of the light guide plate 16 toward the back surface 11d of the liquid crystal panel.

  The light guide plate 16 is made of a synthetic resin material (for example, acrylic resin such as PMMA or polycarbonate) having a refractive index sufficiently higher than air and substantially transparent (excellent translucency). As shown in FIG. 3, the light guide plate 16 has a horizontally long rectangular shape when seen in a plane, like the liquid crystal panel 11 and the optical member 15. The light guide plate 16 has a plate shape that is thicker than the optical member 15. The light guide plate 16 has a major side (plate surfaces 16a, 16f) whose long side direction coincides with the X-axis direction, a short side direction coincides with the Y-axis direction, and the main surface (plate surfaces 16a, 16f). It is drawn in each figure so that the plate thickness direction perpendicular to the Z axis direction coincides with the Z axis direction. The size of the light guide plate 16 (short side dimension and long side dimension) when viewed from the front side is set larger than that of the liquid crystal panel 11. The light guide plate 16 is disposed in the display device 10 such that an end portion of the light guide plate 16 protrudes outward from an end portion of the liquid crystal panel 11.

  The light guide plate 16 is formed to be slightly larger than the liquid crystal panel 11 so that its end protrudes outward from the outer peripheral end of the array substrate 11b of the liquid crystal panel 11 over the entire circumference. The light guide plate 16 is disposed on the back side of the optical member 15 and is sandwiched between the optical member 15 and the chassis 14. The LED unit LU in a state of being supported by the light source support member 19 is disposed outside the two end surfaces 16b and 16c on the long side of the light guide plate 16, and light from the LED unit LU is transmitted to the end surface 16b, The light guide plate 16 is introduced from 16c. The light guide plate 16 has a function of rising and emitting light toward the optical member 15 side (front side) while propagating light from the LED unit LU introduced from the end faces 16b and 16c on the long side. .

  Of the plate surfaces of the light guide plate 16, a front-side plate surface (a surface facing the optical member 15) 16 a is a light emitting surface 16 a that emits internal light toward the optical member 15 and the liquid crystal panel 11. Of the outer peripheral end surfaces adjacent to the main surface (the plate surface 16a and the like) of the light guide plate 16, both side surfaces 16b and 16c on the long side extending in the X-axis direction are respectively LEDs 17 (LED substrates). 18) and a pair of light incident surfaces 16b and 16c on which the light emitted from the LED 17 is incident. The light incident surfaces 16b and 16c are arranged in parallel along the X-axis direction and the Z-axis direction (the main plate surface of the LED substrate 18), respectively, and are substantially orthogonal to the light emitting surface 16a. Further, among the outer peripheral end surfaces of the light guide plate 16, both short side end surfaces 16d and 16e having a short side are arranged in parallel along the Y-axis direction and the Z-axis direction, respectively, and are arranged on the light emitting surface 16a. It is substantially orthogonal to the direction.

  On the back side of the light guide plate 16, a reflection sheet 20 for reflecting the light in the light guide plate 16 toward the light emitting surface 16 side is disposed. The reflection sheet 20 is provided so as to cover the entire plate surface 16 c on the back side of the light guide plate 16. The reflection sheet 20 is disposed in the display device 12 so as to be sandwiched between the chassis 14 and the light guide plate 16. The reflection sheet 20 is made of a synthetic resin sheet (for example, a foamed polyethylene terephthalate sheet) having a white surface with excellent light reflectivity.

  Note that at least one of the light exit surface 16a and the back plate surface 16f of the light guide plate 16 is a reflecting portion (not shown) that reflects the light inside the light guide plate 16, or the light inside the light guide plate 16 is scattered. The scattering portion (not shown) is patterned so as to have a predetermined in-plane distribution. Accordingly, the light emitted from the light emitting surface 16a is controlled to have a uniform distribution in the surface.

  Next, the LED 17 and the LED board 18 that constitute the LED unit LU will be described. 4 and 5, the LED 17 has a configuration in which an LED chip is sealed with a resin material on a substrate portion fixed to the LED substrate 18. 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 17 is a so-called top emission type in which the surface opposite to the mounting surface with respect to the LED substrate 18 (the plate surface facing the light incident surfaces 16b and 16c of the light guide plate 16) is the main light emitting surface 17a. .

  As shown in FIGS. 3 to 5, the LED substrate 18 is an elongated plate shape (band shape, extending along the long side direction of the light guide plate 16 (X-axis direction, the longitudinal direction of the light incident surfaces 16 b and 16 c). (Long form). The LED board 18 is accommodated in the frame 13 and the chassis 14 with the principal surface thereof in a posture along the X-axis direction and the Z-axis direction (that is, a posture aligned in parallel with the light incident surfaces 16b and 16c of the light guide plate 16). Has been. The LED substrate 18 has a length (dimension) in the longitudinal direction set to be the same as the long side of the light guide plate 16. A plurality of LEDs 17 are surface-mounted on a plate surface (mounting surface) 18 a facing the light guide plate 16 side of the LED substrate 18. A plurality of LEDs 17 are arranged in a line on the mounting surface 18a of the LED substrate 18 along the length direction (X-axis direction) at a predetermined interval. In addition, LED rows composed of a plurality of LEDs 17 are arranged in parallel to each other along the long side direction of the light guide plate 16. The distance between the LEDs 17 adjacent in the X-axis direction (that is, the arrangement pitch of the LEDs 17) is set to be approximately equal. Note that the arrangement direction of the LEDs 17 coincides with the length direction (X-axis direction) of the LED substrate 18.

  The mounting surface 18a of the LED substrate 18 extends along the longitudinal direction (X-axis direction) of the LED substrate 18 and connects the adjacent LEDs 17 across the LEDs 17 in series. A wiring pattern (not shown) made of a foil is formed. The terminal portions formed at both ends of the wiring pattern are connected to the power supply substrate PWB via wiring members such as connectors and electric wires, so that driving power is supplied to each LED 17. The LED boards 18 that are paired with the light guide plate 16 in between are housed in the frame 13 and the chassis 14 with their mounting surfaces 18a facing each other, so that each of the LED boards 18 mounted on the paired LED boards 18 is mounted. The main light emitting surfaces 17a of the LEDs 17 are opposed to each other, and the optical axis of each LED 17 substantially coincides with the Y axis direction. The base material of the LED substrate 18 is made of a metal such as aluminum, for example, and the above-described wiring pattern (not shown) is formed on its surface via an insulating layer. A white solder resist film (not shown) is formed on the insulating layer so as to cover the wiring pattern. In addition, as a material used for the base material of LED board 18, insulating materials, such as a ceramic, can also be used.

  The light source support member (heat radiating member) 19 is made of a metal material having excellent thermal conductivity such as aluminum. The light source support member 19 includes a support portion 19a to which the LED board 18 on which the LEDs 17 are mounted is attached to support the LED 17, a heat radiating portion (first heat radiating portion) 19b in contact with the plate surface of the chassis 14, and the liquid crystal panel 11. And an overhang portion 19 c disposed between the light guide plate 16 and the light guide plate 16. The light source support member 19 generally has a shape extending along the long side direction of the light guide plate 16. The length (length in the longitudinal direction) of the light source support member 19 is set to be substantially the same as the length (length in the longitudinal direction) of the LED substrate 18 described above. The light source support members 19 are arranged so as to face the end faces 16b and 16c in a state where the LED units LU are supported. The basic configuration of each light source support member 19 arranged on each end face 16b, 16c side is the same as each other. Therefore, the light source support member 19 disposed on the end face 16b side will be described as an example with reference to FIG.

  The support portion 19a has a plate shape arranged in parallel to the plate surface 18a of the LED substrate 18 and the light incident surface 16b. Further, the support portion 19 a is in a state of being upright with respect to the chassis 14. The long side direction of the support portion 19a coincides with the X axis direction, the short side direction coincides with the Z axis direction, and the thickness direction coincides with the Y axis direction. The LED substrate 18 is attached to an inner plate surface (plate surface facing the light guide plate 16 side) 19a1 of the support portion 19a. The LED board 18 is attached so that the plate surface 18b on the opposite side of the mounting surface 18a contacts the plate surface 19a of the support portion 19a. Although the long side dimension of the support portion 19 a is set to be substantially the same as the long side dimension of the LED substrate 18, the short side dimension is set slightly larger than the short side dimension of the LED substrate 18. And the heat radiating part 19b is connected to one edge part (lower end part) 19a4 in the transversal direction of the support part 19a distribute | arranged to the chassis 14 side. Further, an overhang portion 19c is connected to the other end portion (upper end portion) 19a3 in the short side direction of the support portion 19a disposed on the display surface 11c side (frame 13 side). The end portion (upper end portion) 19a3 protrudes above the front side plate surface (light emitting surface) 16a of the light guide plate 16 (front side, frame 13 side).

  Of the support portion 19a, an outer plate surface (that is, a plate surface on the opposite side of the plate surface to which the LED substrate 18 is attached) 19a2 is a predetermined amount relative to an outer wall portion 13b (13b1) of the frame 13 described later. Opposite while keeping a distance. And the support part 19a is distribute | arranged in the display apparatus 10 (backlight apparatus 12) in the form interposed between the said outer wall part 13b (13b1) and the light-guide plate 16. As shown in FIG. The support portion 19a rises from the inner end of the heat dissipation portion 19b toward the front side (the frame 13 side) along the Z-axis direction (the stacking direction of the liquid crystal panel 11, the optical member 15, and the light guide plate 16). As shown in FIG. 5, a printed circuit board 213 connected to the end of the flexible substrate 211 is disposed on the outer plate surface 19a2 side of the support portion 19a. Further, the LEDs 17 mounted on the LED substrate 18 are arranged in a space between the support portion 19a and the end surface (light incident surface) 16b. The support portion 19a supports the LED 17 such that the main light emitting surface 17a faces the end surface (light incident surface) 16b while maintaining a predetermined distance.

  The heat radiating portion 19 b is arranged in parallel with the plate surface of the chassis 14 and has a plate shape extending along the long side direction of the light guide plate 16. In each figure, the long side direction of the heat dissipating part 19b coincides with the X-axis direction, the short side direction coincides with the Y-axis direction, and the thickness direction coincides with the Z-axis direction. The heat radiation part 19b has a shape extending from the lower end part of the support part 19a toward the outer wall part 13b (13b1) side on the outside (the side opposite to the light guide plate 16 side). The long side dimension of the heat radiating part 19b is set to be substantially the same as the long side dimension of the support part 19a. A plate surface on the back side (lower side) of the heat radiating portion 19 b (that is, a plate surface facing the chassis 14) is in surface contact with the plate surface of the chassis 14. A hollow screw hole 19d is provided at the inner end of the heat dissipating part 19b. The screw hole portion 19d is provided so as to enter a part of the support portion 19a from the heat radiating portion 19b. The light source support member 19 is fixed to the chassis 14 (edge bottom plate 141b) by screwing a metal screw member SM1 inserted through the screw hole 25a of the chassis 14 into the screw hole portion 19d. The heat generated with the lighting of the LED 17 is transmitted to the chassis 14 via the LED substrate 18, the support portion 19a, and the heat dissipation portion 19b. In this way, the heat generated from the LED 17 or the like is efficiently dissipated to the outside of the liquid crystal display device 10, and the heat is suppressed from being generated inside the device 10 (12).

  The overhanging portion 19 c generally projects from the upper end portion 19 a 3 of the support portion 19 a toward the light guide plate 16 side (light incident surface 16 b) side and extends along the long side direction of the light guide plate 16. It has a shape. In each drawing, the long side direction of the overhanging portion 19c coincides with the X-axis direction, the short side direction coincides with the Y-axis direction, and the thickness direction coincides with the Z-axis direction. The outer portion 19c1 of the overhang portion 19c is provided on the light guide plate 16 side (light) so as to cover the LED 17 (that is, the LED unit LU) mounted on the LED substrate 18 from above (front side) from the upper end portion 19a3 of the support portion 19a. Projecting toward the incident surface 16b side). For this reason, the outside (root side) portion 19c1 of the overhang portion 19c has an interval (gap) between the support portion 19a of the light source support member 19 and the light incident surface 16b of the light guide plate 16 from above (front side). It is in the form of closing. Therefore, the outer portion 19c1 of the overhang portion 19c suppresses light emitted from the LED 17 from leaking upward (from the liquid crystal panel side) between the support portion 19a and the light incident surface 16b.

  In addition, an inner (front side) portion 19 c 2 of the overhang portion 19 c is sandwiched between the liquid crystal panel 11 and the light guide plate 16. When viewed from the display surface 11a side, the inner portion 19c2 is arranged on the light emitting surface 16a so as to cover the overlapping portion 16a2 overlapping the non-display area 11c2 in the light emitting surface 16a of the light guide plate 16. . Further, the inner portion 19c2 of the overhang portion 19c is opposed to the liquid crystal panel 11 so as to overlap with the non-display area 11c2. Note that the inner portion 19c2 overlaps with the non-display area 11c2 at the end of the CF substrate 11a. A frame-like black matrix BM surrounding the display area 11c1 is formed at the end of the CF substrate 11a. The position of the inner portion 19c2 of the overhanging portion 19c is in the Y-axis direction (the overhanging portion 19c is In the exit direction) at least partially overlaps the black matrix BM in the Z-axis direction. In other words, in the case of the present embodiment, the position of the inner portion 19c2 is in a state of reaching the portion of the light emitting surface 16a that overlaps the black matrix BM of the CF substrate 11a provided in the non-display region 11c2. ing. If the inner portion 19c2 of the overhanging portion 19c reaches the display region 11c1 and enters the display region 11c1, the inserted portion appears as a dark portion on the display surface 11c (display region 11c1). Therefore, the position of the inner portion 19c2 of the overhang portion 19c is preferably set so as not to enter the display area 11c1.

  Of the light emitting surface 16a, the portion covered with the inner portion 19c2 of the overhanging portion 19c does not emit light toward the liquid crystal panel 11 (optical member 15). The light emitted from the light emitting surface 16a toward the inner portion 19c2 is reflected by the plate surface of the inner portion 19c2 and returned again into the light guide plate 16. Of the overlapping portion 16a2 of the light emitting surface 16a, the portion that is not covered by the inner portion 19c2 (the portion closer to the display region 11c1 than the inner portion 19c2) has a certain amount of light to the liquid crystal panel 11 (optical member 15). Emitted to the side. However, since the black matrix BM of the CF substrate 11a faces the upper portion (front side) of the portion, the light emitted from the portion is shielded by the BM.

  In the case of the present embodiment, the light exit surface 16a of the light guide plate 16 is set to be larger than the plate surfaces 11c and 11d of the liquid crystal panel 11, so that the non-display region 11c2 is provided on the edge side of the light exit surface 16a. There are some blank areas that do not overlap. This blank portion is a portion covered by the inner portion 19c2 of the overhang portion 19c, and light is prevented from leaking from the blank portion to the front side (the liquid crystal panel 11 side). That is, when the inner portion 19c2 of the overhang portion 19c is arranged so as to cover the overlapping portion 16a2, the blank portion is also covered by the inner portion 19c2.

  As shown in FIG. 5 and the like, an optical member (optical sheet) 15 is disposed on the inner side (display area 11c1 side) of the inner portion 19c2 of the overhang portion 19c. The optical member 15 is mainly disposed on a portion 16a1 of the light emitting surface 16a that overlaps the display region 11c1. However, the end of the optical member 15 is disposed on the overlapping portion 16a2 that overlaps the non-display area 11c2. The end surface of the optical member 15 faces the inner portion 19c2, and the light emitted from the light emitting surface 16a is difficult to enter inside from the end surface of the optical member 15 by the inner portion 19c2.

  Next, the configuration of the frame 13 and the chassis 14 will be described. Both the frame 13 and the chassis 14 are made of a metal material such as aluminum, and are excellent in mechanical strength (rigidity), thermal conductivity, and the like. The frame 13 and the chassis 14 accommodate a pair of LED units LU supported by the light source support member 19, and stack the liquid crystal panel 11, the optical member 15, the light guide plate 16, and the reflection sheet 20 on the front side and the back side. Hold it in the form of being sandwiched between.

  As shown in FIGS. 3 to 5, the frame 13 has a frame shape surrounding the display area 11c1 on the display surface 11c of the liquid crystal panel 11, and has a horizontally long rectangular shape similar to the liquid crystal panel 11 or the like as a whole. There is no. The frame 13 mainly includes a frame-shaped facing portion 13a disposed on the front side of the liquid crystal panel 11, an outer wall portion 13b extending from the outer edge portion of the facing portion 13a toward the chassis 14, and an inner edge portion of the facing portion 13a. And a contact portion 13c addressed to the non-display area 11c2 disposed on the periphery of the display area 11c1.

  The facing portion 13a is divided into a long facing portion 13a1 disposed on the long side of the frame 13 and a short facing portion 13a2 disposed on the short side thereof. The outer wall portion 13b is divided into a long outer wall portion 13b1 disposed on the long side of the frame 13 and a short outer wall portion 13b2 disposed on the long side. The two long side portions of the frame 13 basically have the same structure. Further, the two short side portions provided in the frame 13 basically have the same structure.

  The facing part 13a is arranged on the front side of the liquid crystal panel 11 so as to cover the non-display area 11c2 on the display surface 11c. The facing portion 13a extends from the contact portion 13c toward the outside (the outer edge side of the frame 13) and faces the edge bottom plates 141b and 141c of the chassis 14 described later. Each of the long opposing portion 13a1 and the short opposing portion 13a2 has a plate shape having a predetermined thickness that spreads along the plate surface of the chassis 14 (the plate surface of the liquid crystal panel 11).

  The long-side contact portion 13c included in the long-side facing portion 13a1 includes a portion that presses the long-side end portion (non-display region 11c2) of the liquid crystal panel 11 from the front side toward the chassis 14 (light guide plate 16) side. It has become. The contact portion 13c on the long side has an elongated shape along the long side direction of the frame 13 (opposing portion 13a). The protruding tip 131 of the contact portion 13c on the long side is made of an elastic body having a light shielding property (for example, a black rubber elastic body). The contact portion 13c on the long side is set so that the tip portion 131 is addressed to the non-display area 11c2 of the liquid crystal panel 11.

  The short-side contact portion 13c provided in the short-side facing portion 13a2 can push the end portion (non-display area 11c2) on the short side of the liquid crystal panel 11 from the front side toward the chassis 14 (light guide plate 16) side. It has become a part. The short side contact portion 13a has an elongated shape along the short side direction of the frame 13 (opposing portion 13a). The protruding tip 131 of the short-side contact portion 13c is made of an elastic body having a light shielding property (for example, a black rubber elastic body), like the long-side contact portion 13c. The short-side contact portion 13c is set so that the tip portion 131 is addressed to the non-display area 11c2 of the liquid crystal panel 11. Note that the end (terminal) of the elongate short-side contact portion 13c provided in the short facing portion 13a2 is the end portion (terminal) of the long-side contact portion 13c provided in the long facing portion 13a1. )It is connected to the. That is, the contact portion 13c generally has a frame shape surrounding the display area 11c1 of the liquid crystal panel 11 and being addressed to the non-display area 11c2.

  The outer wall portion 13b generally surrounds the liquid crystal panel 11 and the like and has a frame shape (square tube shape) extending from the facing portion 13a to the chassis 14 side. The outer wall part 13b is provided in the outer edge part of the opposing part 13a. The outer wall portion 13b is arranged so as to surround the periphery (end surface) of the laminate composed of the liquid crystal panel 11, the optical member 15, the light guide plate 16, and the reflection sheet 20.

  The longitudinal outer wall portion 13b1 has a plate shape (wall shape) having a predetermined thickness extending straight downward (from the chassis 14 side) from the outer edge portion of the longitudinally facing portion 13a1. There are gaps between the longitudinal outer wall 13b1 and the end faces (light incident faces) 16b and 16c of the light guide plate 16, and the LED units LU are arranged in these gaps. A groove 13d into which a metal screw member SM2 can be screwed is formed at the lower end of the longitudinal outer wall 13b1. When the screw member SM2 is inserted into the screw hole 25b of the chassis 14 and is screwed into the groove 13d, the frame 13 and the chassis 14 are fixed to each other on the long side.

  The short outer wall portion 13b2 has a plate shape (wall shape) having a predetermined thickness extending straight downward (from the chassis 14 side) from the outer edge portion of the short facing portion 13a2. A groove portion (not shown) into which a screw member (not shown) can be screwed is formed at the lower end portion (tip portion) of each short outer wall portion 13b2. When the screw member is threaded into the groove while being passed through a screw hole (not shown) of the chassis 14, the frame 13 and the chassis 14 are fixed to each other on the short side.

  The chassis 14 is generally composed of a horizontally long plate-like member like the liquid crystal panel 11 and the like, and covers the plate surface 16f on the back side of the light guide plate 16 so as to cover the liquid crystal display unit LDU (liquid crystal display). Arranged on the back side of the device 10). The chassis 14 has a plate-like bottom plate 14a having a rectangular shape, standing wall plates 14b and 14c erected on each end portion on the long side of the bottom plate 14a, and these standing wall plates 14b and 14c opposite to the bottom plate 14a. Edge bottom plates 141b and 141c extending toward the side (outside). The bottom plate 14 a is a portion addressed to the plate surface 16 f on the back side of the light guide plate 16 through the reflection sheet 20 and occupies most of the chassis 14. The bottom plate 14 a is in close contact with the plate surface 16 f on the back side of the light guide plate 16 through the reflection sheet 20.

  The standing wall plates 14b and 14c are provided on each side of the long side of the bottom plate 14a so as to be arranged in parallel to each other. Each of the standing wall plates 14b and 14c is made of a plate-like member having a thickness similar to that of the bottom plate 14a. The standing wall plates 14b and 14c are erected from the bottom plate 14a toward the side opposite to the liquid crystal panel 11 side (back side). The standing wall plates 14b and 14c are formed in a plate shape (wall shape) extending elongated along the long side direction of the bottom plate 14a. In the case of this embodiment, the standing wall plates 14b and 14c are arranged on the inner side of the end surfaces 16b and 16c on the long side of the light guide plate 16 as shown in FIG. That is, the standing wall plates 14 b and 14 c are in a state of being recessed inside the long side end surfaces 16 b and 16 c of the light guide plate 16. Edge bottom plates 141b and 141c are provided from the long side wall plates 14b and 14c toward the outside of the bottom plate 14a. The edge bottom plates 141b and 141c are formed of a plate-like member that extends elongated along the long side direction of the bottom plate 14a and has a thickness similar to that of the bottom plate 14a. The edge bottom plates 141b and 141c are locations where the outer wall portion 13b1 of the frame 13 and the LED unit LU are arranged, respectively. In addition, the edge bottom plates 141 b and 141 c are portions that are in surface contact with the heat radiation portion 19 b of the light source support member 19. Furthermore, the edge bottom plates 141b and 141c are portions facing the longitudinally facing portion 13a1 of the frame 13.

  Two types of insertion holes 25a and 25b are provided in the edge bottom plates 141b and 141c arranged on the long side of the chassis 14, respectively. One insertion hole 25b is provided near the outer side of the edge bottom plates 141b and 141c, and is a hole through which a screw member SM2 used to fix the chassis 14 to the frame 13 is inserted. The screw member SM1 is inserted into the insertion hole 25b of the edge bottom plates 141b and 141c, and is screwed into the groove 13d provided in the outer wall portion 13b1 of the frame 13, whereby the chassis 14 is attached to the frame 13. Fixed. On the other hand, the other insertion hole 25a is provided on the inner side of the edge bottom plates 141b and 141c, and a metal screw member SM1 used for fixing the light source support member 19 to the chassis 14 is provided. It is a hole to be inserted. The screw member SM1 is inserted into the insertion hole 25a of the edge bottom plates 141b and 141c and is screwed while being inserted into the screw hole portion 19d of the light source support member 19, whereby the light source support member 19 (LED unit) is attached to the chassis 14. LU) is fixed.

  By fixing the chassis 14 to the frame 13 in this way, a laminate composed of the liquid crystal panel 11, the optical member 15, the light guide plate 16, and the reflection sheet 20 and a pair of LED units LU arranged on the periphery thereof are formed. , And held between the frame 13 and the chassis 14. Also on the short side, the chassis 14 is fixed to the frame 13 by using screw members (not shown). And also about the short side, the said laminated body is hold | maintained in the state clamped by the flame | frame 13 and the chassis 14. FIG. A contact portion 13 c provided on the frame 13 sandwiches the laminate with the bottom plate 14 a of the chassis 14 in a state where the contact portion 13 c is addressed to the non-display area 11 c 2 on the front side periphery of the liquid crystal panel 11. .

  Here, an operation procedure for assembling each component of the liquid crystal display device 10 will be described. First, the frame 13 is set on a predetermined work table. At that time, the frame 13 on the work table is in a state where the front side faces the lower side (work table side) and the back side faces the upper side. That is, the frame 13 is set upside down on the work table. Next, the liquid crystal panel 11 is assembled on the upper side of the frame 13 on the work table (that is, the back side of the frame 13). At this time, the liquid crystal panel 11 is in a state in which the CF substrate 11a is disposed on the lower side (workbench side) and the array substrate 11b side is disposed on the upper side. The contact portion 13c of the frame 13 is in a state of being addressed to the non-display area 11c2 of the liquid crystal panel 11. Next, the optical member 15 is placed on the back side (the back surface 11 d side) of the liquid crystal panel 11.

  Thereafter, the LED unit LU supported by the light source support member 19 is arranged on the frame 13 side so that the inner portion 19c2 of the overhanging portion 19 faces the non-display area 11c2 of the liquid crystal panel 11. Then, the light guide plate 16 is placed on the optical member 15. At this time, the light guide plate 16 is in a state where the front-side plate surface 16a serving as the light emitting surface 16a is arranged on the lower side, and the back-side plate surface 16f is arranged on the upper side. In addition, the light guide plate 16 is disposed on the frame 13 side so that the overhanging portion 19 (inner portion 19c2) of the light source support member 19 covers the overlapping portion 16a2 of the light emitting surface 16a. Next, the reflection sheet 20 is assembled on the plate surface 16 f on the back side of the light guide plate 16. The chassis 14 is assembled to the frame 13 side.

  Each component of the liquid crystal display unit LDU is assembled by fixing the chassis 14 to the frame 13 using the screw member SM1 or the like. Thereafter, the stand mounting member STA and the various substrates PWB, MB, and CTB are assembled on the back surface side of the liquid crystal display unit LDU, and the stand ST and the cover member CV are further assembled. The display device 10 and the television receiver TV are manufactured.

  When the power supply of the liquid crystal display device 10 is turned on, various signals are supplied from the control board CTB to the liquid crystal panel 11 in response to power supply from the power supply board PWB, and its driving is controlled. Each LED 17 constituting the backlight device 12 is driven to turn on. When each LED 17 is driven and light is emitted from each LED 17, light is incident on the inside from the light incident surfaces 16 b and 16 c of the light guide plate 16. The incident light is reflected by the reflection sheet 20 laid on the back side of the light guide plate 16 and travels through the light guide plate 16, and from the front side plate surface (light emitting surface 16 a) toward the optical member 15. Emitted. The emitted light passes through the optical member 15 and becomes light that spreads substantially uniformly in a planar shape, and irradiates the back surface 11 d of the liquid crystal panel 11. The liquid crystal panel 11 displays an image on the display area 11c1 of the display surface 11c by using the light spread in a planar shape.

  In the liquid crystal display device 10 of the present embodiment, a light guide plate 16 is disposed on the back surface 11 d side of the liquid crystal panel (display panel) 11. The LED (light source) 17 is supported by a light source support member 19 so as to face the light incident surfaces 16 b and 16 c of the light guide plate 16. The light source support member 19 is opposed to the light incident surfaces 16b and 16c while keeping a space therebetween, and a support portion 19a that supports the LED (light source) 17 so that the LED (light source) 17 is arranged within the space. Have. The light source support member 19 projects from the end (upper end) 19a3 of the support 19a disposed on the liquid crystal panel (display panel) 11 side to the light incident surfaces 16b and 16c, and out of the light exit surface 16a. An overhanging portion 19c is provided between the liquid crystal panel (display panel) 11 and the light guide plate 16 so as to cover a portion overlapping the non-display area 11c2.

  In the liquid crystal display device 10, some of the light emitted from the LED 17 is directly incident (introduced) into the light guide plate 16 from the light incident surface 16 b or the like, and is disposed above (front side) the LED 17. Some of them proceed to the protruding portion 19c side. The overhang portion 19c is made of metal, and the surface thereof has a certain degree of light reflectivity. Therefore, when the light emitted from the LED 17 is applied to the overhang portion 19c (outer portion 19c1), it is reflected by the surface (the surface facing the LED 17). Therefore, the light emitted from the LED 17 leaks from the gap formed between the support portion 19a of the light source support member 19 and the light incident surface 16b (or 16c) toward the end surface (end portion) of the liquid crystal panel 11. Protruding is prevented by the overhanging portion 19c (outer portion 19c1). If light enters from the end face of the liquid crystal panel 11 (end face of each substrate 11a, 11b) rather than the thickness direction of the liquid crystal panel 11 (from the back face 11d side to the display face 11c side), the display area 11c1 side displays. Brightness unevenness (bright part) occurs in the region 11c1. However, since the liquid crystal display device 10 according to the present embodiment includes the overhanging portion 19c as described above, occurrence of such luminance unevenness is prevented.

  By the way, in the liquid crystal display device 10 of this embodiment, each board | substrate 11a, 11b which comprises the liquid crystal panel 11 is a magnitude | size stored in the light-projection surface 16a of the light-guide plate 16. FIG. Therefore, in addition to the light leaking from the space (gap) between the support portion 19a and the light incident surface 16b (or 16c) described above, the peripheral edge (overlapping portion) of the light incident surface 16a is provided on the end surfaces of the substrates 11a and 11b. There is a possibility that light emitted from 16a2 and a blank portion outside the 16a2 enters. In particular, the end (end face) of the CF substrate 11a arranged on the front side of the liquid crystal panel 11 is arranged on the inner side (display area 11c1 side) than the end (end face) of the array substrate 11b. There is a higher possibility that light emitted from the peripheral edge of the emission surface 16a will enter. However, in the liquid crystal display device 10 of the present embodiment, the inner portion 19c2 of the overhang portion 19c is arranged so as to cover the overlapping portion 16a2 that overlaps the non-display region 11c2 of the light emitting surface 16a. Light emitted from 16a2 or the like is prevented from entering the display region 11c1 side from the end surfaces of the substrates 11a and 11b.

  In the case of the present embodiment, if the inner portion 19c2 is arranged so as to at least partially overlap (oppose) the black matrix BM at the end of the CF substrate 11a, the end face of the liquid crystal panel 11 (particularly, The problem of light entering from the end surface of the CF substrate 11a to the display area 11c1 side is solved.

  As described above, since the optical support member 19 includes such an overhanging portion 19 c, light emitted from the LED (light source) 17 is directly applied to the end portion (end surface) of the liquid crystal panel (display panel) 11. And the light emission surface 16a from the portion (the portion overlapping the non-display region 11c2) 16a2 to the end portion (end surface) of the liquid crystal panel (display panel) 11. It is suppressed that light is emitted toward. As a result, in the liquid crystal display device 10, light enters the liquid crystal panel (display panel) 11 from the end (end face) of the liquid crystal panel (display panel) and causes luminance unevenness in the display area 11 c 1 of the display surface 11 c. It is suppressed.

  In addition, the liquid crystal display device 10 of the present embodiment is interposed between the liquid crystal panel (display panel) 11 and the light guide plate 16 so that the end portion is disposed on the inner side of the overhanging portion 19c (inner portion 19c2). An optical member (optical sheet) 15 that transmits light emitted from the light emitting surface 16a toward the back surface 11d of the liquid crystal panel (display panel) is provided. In the liquid crystal display device 10, the optical member (optical sheet) 15 is displayed on the display surface 11 c by light entering the optical member 15 from the end portion (end surface, end surface of each sheet) of the optical member 15 by the projecting portion 19 c. Generation of luminance unevenness in the region 11c1 is suppressed. Also in the optical member 15, when light enters from the end face to the inside (a portion overlapping the display region 11 c 1), not from the thickness direction, light having an unnecessarily high luminance is emitted from the entering portion. become. As a result, luminance unevenness occurs on the display surface 11 c of the liquid crystal panel 11. However, in the liquid crystal display device 10 of the present embodiment, the end portion (end surface) of the optical member 15 is covered (opposed) with the overhang portion 19c (particularly, the inner portion 19c2). The emitted light is prevented from traveling directly toward the end (end surface) of the optical member 15 and from the overlapping portion 16a2 of the light emitting surface 16a toward the end (end surface) of the optical member 15. The emission of light is suppressed.

  Further, in the liquid crystal display device 10 of the present embodiment, the overhanging portion 19c is disposed between the liquid crystal panel 11 and the light guide plate 16 so as not to cover the portion 16a1 overlapping the display region 11c1 in the light emitting surface 16a. Is. As described above, when the projecting portion 19c is arranged between the liquid crystal panel 11 and the light guide plate 16 so as not to cover the portion 16c1 of the light emitting surface 16a that overlaps the display region 11c1, the display on the display surface 11c is displayed. The protruding portion 19c is prevented from entering the region 11c1, and consequently the dark portion (luminance unevenness) is suppressed from being generated in the display region 11c1 by blocking the light.

  Further, in the liquid crystal display device 10 of the present embodiment, the light source support member 19 is made of a metal material. Thus, if the light source support member 19 is comprised from a metal material, the light source support member 19 will be excellent in thermal conductivity (heat dissipation).

  Further, the liquid crystal display device 10 of the present embodiment includes a metal chassis 14 that faces the plate surface 16f on the back side of the light guide plate 16 and is connected to the lower end portion of the support portion 19a. Thus, when the chassis 14 is provided, the heat generated from the LEDs 17 can be received by the support portion 19a and further moved to the chassis 14 (edge bottom plates 141b and 141c). Therefore, in the liquid crystal display device 10 of the present embodiment, the heat generated from the LEDs 17 can be efficiently radiated (cooled) using the chassis 14.

  Further, in the liquid crystal display device 10 of the present embodiment, the light source support member 19 extends outward from the end portion (lower end portion) of the support portion 19a disposed on the chassis 14 side, contacts the chassis 14, and the LED 17 It has a heat radiating part (first heat radiating part) 19b that receives the heat generated from the air and moves it to the chassis 14 (edge bottom plates 141b, 141c). As described above, when the light source support member 19 includes the heat radiating portion (first heat radiating portion) 19b, the heat received by the support portion 19a from the LED 17 can be easily transferred to the chassis 14 (edge bottom plates 141b and 141c). . Therefore, in the liquid crystal display device 10 of the present embodiment, the heat generated from the LED 17 can be efficiently radiated (cooled).

<Embodiment 2>
Hereinafter, 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. In the present embodiment, a liquid crystal display device 10A including a backlight device 12A is illustrated. FIG. 6 is an enlarged cross-sectional view of the liquid crystal display device 10A according to the second embodiment. The cross-sectional configuration of the liquid crystal display device 10A shown in FIG. 6 corresponds to the cross-sectional configuration of the liquid crystal display device 10 of Embodiment 1 shown in FIG. The liquid crystal display device 10A according to the present embodiment is configured by attaching a reflection member 30 to the overhanging portion 19c of the light source support member 19 according to the first embodiment.

  The reflection member 30 has a sheet shape, and the light reflectance of the surface thereof is higher than the light reflectance of the surface of the overhanging portion 19c. As the reflection member 30, a material obtained by processing a raw material used for the reflection sheet 20 or the like into a predetermined shape, a light reflective coating film, or the like is used. In the case of the present embodiment, the reflecting member 30 is disposed on the outer portion 19c1 of the plate-like overhanging portion 19c that is passed through a space (gap) between the support portion 19a and the light incident surface 16b. Is provided. Moreover, the reflecting member 30 is affixed on the surface of the overhang | projection part 19c (outer part 19c1) of the side facing LED17. Thus, the overhanging portion 19c can also be used as a location where the reflecting member 30 is attached. When such a reflection member 30 is provided, conventionally, out of the light emitted from the LED 17, from the space (gap) between the support part 19a of the light source support member 19 and the light incident surface 16b directly to the liquid crystal panel 11 side, The light that has been directed is reflected by the reflecting member 30 and reliably returned to the light incident surface 16b side or the like. Moreover, since the light reflectance is high compared with the case of Embodiment 1 (surface of the overhang | projection part 19c itself), it will return more reliably. Therefore, in the liquid crystal display device 10A of this embodiment, the efficiency with which the light emitted from the LED 17 is incident on the light incident surface 16b is increased by the reflecting member 30.

<Embodiment 3>
Next, Embodiment 3 of the present invention will be described with reference to FIG. In the present embodiment, a liquid crystal display device 10B including the backlight device 12B is illustrated. FIG. 7 is an enlarged cross-sectional view of the liquid crystal display device 10B according to the third embodiment. The cross-sectional configuration of the liquid crystal display device 10B shown in FIG. 7 corresponds to the cross-sectional configuration of the liquid crystal display device 10 of Embodiment 1 shown in FIG. The liquid crystal display device 10B (backlight device 12B) according to the present embodiment includes a light source support member 19B instead of the light source support member 19 according to the first embodiment. The light source support member 19 </ b> B of the present embodiment is formed by further providing an upright heat radiating portion 19 e as a second heat radiating portion on the heat radiating portion (first heat radiating portion) 19 b of the light source supporting member 19 of the first embodiment.

  The standing heat radiating portion 19 e is arranged in parallel to the light incident surface 16 b of the light guide plate 16 and has a plate shape extending along the long side direction of the light guide plate 16. Note that FIG. 7 shows that the long side direction of the standing heat radiating portion 19e coincides with the X-axis direction, the short side direction coincides with the Y-axis direction, and the thickness direction coincides with the Z-axis direction. The standing heat radiating part 19e has a shape of rising (standing) from the outer end of the heat radiating part (first heat radiating part) 19b toward the front side. The long side dimension of the standing heat radiating part 19e is set to be substantially the same as the long side dimension of the heat radiating part 19b and the like. And the board surface of the outer side of the standing heat radiating part 19e has a shape in close contact (surface contact) with the board surface inside the outer wall part 13b1 of the frame 13. In addition, the long side dimension of the standing heat radiating part 19e is set to be substantially the same as the long side dimension of the heat radiating part 19b and the like.

  The liquid crystal display device 10B of the present embodiment includes a frame-shaped facing portion 13a that covers the display surface 11c side of the liquid crystal panel 11 so as to face the display area 11c1, and a peripheral edge of the facing portion 13a toward the chassis 14 side. A metal frame 13 that extends and has a peripheral wall portion 13 b connected to the chassis 14 is provided. In addition, the light source support member 19B of the present embodiment extends from the heat radiating portion (first heat radiating portion) 19b toward the facing portion 13a, contacts the peripheral wall portion 13b, receives heat generated from the LED 17, and receives it to the frame 13. An upright heat radiating part (second heat radiating part) 19e to be moved is provided. When such a frame 13 is provided and the light source support member 19B has such an upright heat radiating portion (second heat radiating portion) 19e, the heat received by the support portion 19a from the LED 17 is transferred to the upright radiating portion (second (2 heat dissipating part) 19e can be used to move the frame 13 as well. As a result, in the liquid crystal display device 10B of the present embodiment, the heat generated from the LEDs 17 can be radiated (cooled) more efficiently than in the case of the first embodiment.

<Embodiment 4>
Next, Embodiment 4 of the present invention will be described with reference to FIG. In the present embodiment, a liquid crystal display device 10C including the backlight device 12C is illustrated. FIG. 8 is an enlarged cross-sectional view of a liquid crystal display device 10C according to the fourth embodiment. The cross-sectional configuration of the liquid crystal display device 10C shown in FIG. 8 corresponds to the cross-sectional configuration of the liquid crystal display device 10 of Embodiment 1 shown in FIG. The liquid crystal display device 10C (backlight device 12C) of the present embodiment is configured by using a light source support member 19C instead of the light source support member 19 of the first embodiment. The light source support member 19C of the present embodiment is formed by providing an inclined surface 190 on the inner portion 19c2 of the overhang portion 19c in the first embodiment.

  In the liquid crystal display device 10C of the present embodiment, the overhanging portion 19c is inclined so as to rise from the inner side (display region 11c1 side) toward the support portion 19a side (non-display region 11c2 side), and an optical member (optical sheet). ) Including an inclined surface 190 that forms a gap S1 into which the end of 15 can be inserted with the back surface 11d of the liquid crystal panel 11. As described above, when the protruding portion 19c of the light source support member 19 includes the inclined surface 190, when the optical member (optical sheet) 15 thermally expands or is displaced, the optical member (optical sheet) 15 Even if the end moves to the outside (the projecting portion 19c side), the end of the optical member 15 is inserted into a gap S1 formed between the inclined surface 190 and the liquid crystal panel 11 (array substrate 11b). Will be. That is, in this embodiment, the end of the expanded optical member 15 can be released into the gap S1. Therefore, in the liquid crystal display device 10C of the present embodiment, the end of the optical member 15 is pushed back to the overhanging portion 19c, and the optical member 15 is prevented from being deformed such as bending or wrinkling. When deformation such as bending or wrinkle occurs in the optical member 15, luminance unevenness (dark part or the like) due to the deformation occurs in the display area 11c1 of the liquid crystal panel 11. However, when the inclined surface 190 that forms the gap S1 is provided in the overhanging portion 19c as in the present embodiment, the occurrence of the luminance unevenness described above is 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 first embodiment, the position of the inner portion 19c2 (position in the Y-axis direction) of the overhang portion 19c of the light source support member 19 is a black matrix (BM) provided at the end of the CF substrate 11a. And partially overlapped (overlapped) in the Z-axis direction. In other embodiments, the position of the overhanging portion 19c may be a position facing (overlapping) the entire black matrix (BM). In another embodiment, the position of the inner portion 19c2 of the overhanging portion 19c may be a position that does not face (superimpose) the black matrix (BM). That is, the inner portion 19c2 of the overhanging portion 19c may be disposed on the overlapping portion 16a2 located outside the portion facing the black matrix. However, from the viewpoint of preventing light from reliably entering from the end face of the liquid crystal panel 11, the position of the inner portion 19c2 of the overhang portion 19c (position in the Y-axis direction) is the CF substrate 11a as in the first embodiment. It is preferable that the black matrix (BM) provided at the end of the substrate is at least partially opposed (overlapped) in the Z-axis direction.

  (2) In the first embodiment, the end portion (end surface) of the liquid crystal panel 11 is arranged inside the end surface (light incident surface) 16b of the light guide plate 16 and the like. In other embodiments, the end (end face) position of the liquid crystal panel 11 may be the same as the end face (light incident face) 16b of the light guide plate 16 or the like, or may be disposed on the outer side.

  (3) In Embodiment 2 described above, the reflecting member 30 is affixed to the overhanging portion 19 c so as to be disposed between the support portion 19 a of the light source support member 19 and the light incident surface 16 b of the light guide plate 16. It was. In other embodiments, for example, a reflective member may be provided on the overhanging portion 19c so that a part of the reflective member faces the light emitting surface 16a.

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

  (5) In other embodiments, the number and arrangement of LED substrates and the number and arrangement of LEDs mounted on the LED substrate can be changed as appropriate.

  (6) In the above-described 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. However, 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.

  (7) 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.

  (8) 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.

  (9) 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.

  (10) In other embodiments, an optical member or a reflection sheet may not be provided.

DESCRIPTION OF SYMBOLS 10 ... Liquid crystal display device (display device), 11 ... Liquid crystal panel (display panel), 11a ... Color filter substrate, 11b ... Array substrate, 11c ... Display surface, 11c1 ... Display region, 11c2 ... Non-display region, 11d ... Back surface, DESCRIPTION OF SYMBOLS 12 ... Backlight apparatus (illuminating device) 13 ... Frame, 13a ... Opposite part, 13b ... Outer wall part, 14 ... Chassis, 15 ... Optical member (optical sheet), 16 ... Light guide plate, 16a ... Front side plate surface (light emission) Surface), 16a2 ... overlapping portion, 16b, 16c ... end surface on the long side (light emitting surface), 16d, 16e ... end surface on the short side, 16f ... plate surface on the back side, 17 ... LED (light source), 18 ... LED Substrate (light source substrate), 19 ... light source support member, 19a ... support portion, 19b ... heat radiation portion (first heat radiation portion), 19c ... overhang portion, 19c1 ... outer portion, 19c2 ... inner portion, 19e ... stand heat radiation portion First Heat radiating portion), 20 ... reflective sheet, BM ... black matrix, TV ... television receiver

Claims (11)

A light source;
A display panel having a display area and a display surface including a non-display area surrounding the display area, and a back surface on the opposite side of the display surface;
A plate-like member disposed on the back side, the light incident surface comprising a light incident surface on which the light from the light source is incident, which is an end surface of the plate-like member, and a front plate surface of the plate-like member. A light guide plate having a light exit surface that emits light incident from the surface toward the back surface;
A support portion that is opposed to the light incident surface while maintaining a space and supports the light source so that the light source is disposed within the space, and an end portion of the support portion that is disposed on the display panel side And a light source having a projecting portion disposed between the display panel and the light guide plate so as to cover a portion of the light exit surface that overlaps the non-display area. And a support member.   Light is emitted from the light exit surface to the rear surface of the display panel, and is interposed between the display panel and the light guide plate so that the end portion is disposed on the inner side of the projecting portion. The display device according to claim 1, further comprising an optical sheet to be made.   The display device according to claim 1, further comprising a reflecting member that is attached to a surface of the projecting portion on a side facing the light source and reflects light from the light source.   The said overhang | projection part is arrange | positioned between the said display panel and the said light-guide plate so that the part which overlaps with the said display area among the said light-projection surfaces may be covered. The display device described in 1.   The display device according to claim 1, wherein the light source support member is made of a metal material.   The display device according to any one of claims 1 to 5, further comprising a metal chassis that faces a plate surface on the back side of the light guide plate and is connected to the support portion.   The light source support member extends outward from an end portion of the support portion disposed on the chassis side, contacts the chassis, receives heat generated from the light source, and moves the first heat radiation to the chassis. The display device according to claim 6, further comprising a portion. A frame-like facing portion that covers from the display surface side of the display panel so as to face the display area, and a peripheral wall portion that extends from the periphery of the facing portion toward the chassis side and is connected to the chassis. A metal frame having
The light source support member includes a second heat radiating portion that extends from the first heat radiating portion toward the facing portion, contacts the peripheral wall portion, receives heat generated from the light source, and moves the heat to the frame. Item 8. The display device according to Item 7.   The overhanging portion includes an inclined surface that inclines so as to rise from the inside toward the support portion side and forms a gap into which the end portion of the optical sheet can be inserted from the back surface of the display panel. The display device according to claim 2.   The display device according to claim 1, wherein the display panel includes a liquid crystal panel in which liquid crystal is sealed between a pair of substrates.   A television receiver comprising the display device according to any one of claims 1 to 10.

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