WO2013069601A1

WO2013069601A1 - Display device and television reception device

Info

Publication number: WO2013069601A1
Application number: PCT/JP2012/078599
Authority: WO
Inventors: 後藤　彰
Original assignee: シャープ株式会社
Priority date: 2011-11-10
Filing date: 2012-11-05
Publication date: 2013-05-16

Abstract

This display device (10) is provided with: a light source unit (LU) having a light source (17), a light source mounting member (18) including a light source mounting surface (18a) and, adjacent thereto, an adjacent surface (18b), and a pattern wiring (71) formed from the light source mounting surface (18a) across the adjacent surface (18b); a light guide plate (16) having a light entrance surface (16c) and a light exit surface (16a) that radiates light that has entered from the light entrance surface (16c); a display panel (11) that is applied to the light exit surface (16a) and displays an image using the light exiting from the light exit surface (16a); a chassis (14) that is applied to the plate surface (16b) at the rear side of the light guide plate (16); and a frame (13) that covers the rim of the display side of the display panel (11) and holds the light source unit (LU), the display panel (11), and the light guide plate (16) against the chassis (14).

Description

Display device and television receiver

The present invention relates to 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 the light spread in a planar shape toward the back side of the liquid crystal panel.

As the illumination device, as shown in Patent Document 1, a so-called edge light type (side light) in which a light guide plate made of a transparent plate member and a light source are arranged so as to face an end surface of the light guide plate. Type) is known. In recent years, LED light sources have been widely used as the light source. The LED light source is mounted on a plate-shaped LED substrate, and is mounted in the lighting device such that its mounting surface faces the end surface of the light guide plate. In addition to the LED light source, pattern wiring for supplying electric power to the LED light source from the outside is formed on the mounting surface of the LED substrate.

By the way, in recent years, display devices have been made thinner for the purpose of reducing weight and improving design. Specifically, the display device is thinned by setting the thickness (end surface) of the light guide plate to be approximately the same as that of the LED light source.

JP 2010-72261 A JP 2009-158646 A

(Problems to be solved by the invention)
However, although it is possible to set the thickness of the light guide plate to be small corresponding to the size of the LED light source, there is a limit to downsizing (thinning) the LED substrate on which the LED light source is mounted, which is a problem. Yes. In addition to the space for mounting the LED light source, it is necessary to secure at least a space for forming the pattern wiring on the mounting surface of the LED substrate. Therefore, if the thickness of the light guide plate is set to be approximately the same as the size of the LED light source, the height (vertical width) of the LED substrate inevitably becomes larger than the thickness of the light guide plate, which is a problem.

In addition, if the LED substrate is larger than the thickness of the light guide plate, the thickness of the portion of the display device that accommodates the LED substrate becomes larger than the other portions, which causes the appearance of the display device to be impaired.

Note that Patent Document 2 describes a light emitting device in which a light emitting diode chip is mounted on a metal base having a concave cross-sectional shape. The light emitting diode chip is mounted on the inner side (bottom surface) of the concave metal base, and the pattern wiring is also formed on the inner side of the metal base. The inside is filled with a sealing material. The light emitting device having such a configuration has a problem in that the distance between the light source (light emitting diode chip) and the end face of the light guide plate is increased by the concave metal base.

An object of the present invention is to provide a display device having a structure that can be reduced in thickness, and a television receiver having the display device.

(Means for solving the problem)
A display device according to the present invention includes a light source, a light source mounting surface including the light source mounting surface on which the light source is mounted and an adjacent surface adjacent to the light source mounting surface, and the light source mounting surface to the adjacent surface. And a light source unit having a pattern wiring that is connected to the light source and supplies power to the light source, and a plate-shaped member that is made up of one end surface of the plate-shaped member and receives light from the light source A light guide plate having an incident surface and a light emitting surface that is made of a plate surface on the front side of the plate-like member and emits light incident from the light incident surface, and is directed to the light emitting surface and the light emitting surface A display panel that displays an image using light emitted from the display panel, a chassis that is addressed to the back surface of the light guide plate, and a front peripheral edge of the display panel, and the light source unit, Display panel and said A light plate, and a frame for holding in between said chassis. The display device includes a light source, a light source mounting surface including the light source mounting surface on which the light source is mounted and an adjacent surface adjacent to the light source mounting surface, and the light source mounting surface to the adjacent surface. A light source unit having a pattern wiring connected to a light source and supplying power to the light source. Since the light source unit does not need to secure a portion necessary for forming the pattern wiring only by the light source mounting surface, the light source mounting surface can be set small (thin). Therefore, the display device including the light source unit has a structure that can be reduced in size and thickness.

In the display device, the chassis may form a back side appearance, and the frame may form a front side appearance. When the chassis forms the appearance of the back side of the display device and the frame forms the appearance of the front side of the display device, the appearance shape of the display device is held between the frame and the chassis. In addition, the size of the light source unit or the like is reflected. Therefore, the display device includes the light source unit that is reduced in size, so that a space between the frame and the chassis in a portion sandwiching the light source unit can be set narrow, and moreover, as in the related art. The portion sandwiching the light source unit is prevented from bulging outward from the front side or the back side.

In the display device, the light source mounting surface is preferably disposed so as to face the light incident surface.

In the display device, it is preferable that the adjacent surface is arranged so as to spread on a side opposite to the light emitting side of the light source.

In the display device, the light source mounting member preferably has a columnar shape with a polygonal cross section. When the light source mounting member has a columnar shape with a polygonal cross section, the light source mounting member is stabilized and the adjacent surface is prevented from being displaced with respect to the light source mounting surface. Note that the polygonal shape may be a triangular shape, a square shape such as a square or a rectangle, or a pentagonal shape. The polygonal shape is most preferably a square shape from the viewpoint of miniaturization (thinning) of the light source unit.

In the display device, it is preferable that a vertical width of the light source mounting surface in a direction corresponding to a thickness direction of the light guide plate is set to be substantially the same as a thickness of the light guide plate.

In the display device, it is preferable that a portion of the chassis covering the light source unit and a portion covering the light guide plate have a flat plate shape connected to each other.

In the display device, the pattern wiring may be formed of a metal thin film formed using a printed wiring technique.

In the display device, the light source may be an LED light source.

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 according to the present invention includes any one of the display devices.

(The invention's effect)
ADVANTAGE OF THE INVENTION According to this invention, the display apparatus provided with the structure which can be reduced in thickness, and the television receiver provided with the said display apparatus 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. Rear view of TV receiver Exploded perspective view showing a schematic configuration of a liquid crystal display unit LDU constituting the liquid crystal display device Partial sectional view showing a part of the sectional configuration along the short side direction of the liquid crystal display device Perspective view of LED unit A-A 'line sectional view of FIG. FIG. 9 is a partial cross-sectional view showing a part of a cross-sectional configuration along the short side direction of the liquid crystal display device according to the second embodiment. The perspective view of the LED unit which concerns on Embodiment 2. FIG. Explanatory drawing of the LED unit in a state of being flattened Explanatory drawing of the LED unit which concerns on Embodiment 3.

<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 6. In the present embodiment, a television receiver TV, a liquid crystal display device 10, and a lighting device 12 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 an illuminating device 12 as an external light source, and these constitute the front side appearance of the liquid crystal display device 10. The frame 13 and the chassis 14 constituting the appearance of the back side (back side) are integrally held.

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 mounting member 18 which the illuminating device 12 has is passed 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, and 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 LED light source 17 included in the illumination 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.

FIG. 3 is an exploded perspective view showing a schematic configuration of the liquid crystal display unit LDU constituting the liquid crystal display device 10, and FIG. 4 is a partial cross section showing a part of the cross-sectional configuration along the short side direction of the liquid crystal display device 10. FIG. As shown in FIGS. 3 and 4, the liquid crystal display unit LDU constituting the liquid crystal display device 10 includes a frame (front frame) 13 having main components arranged on the front side and a chassis arranged on the back side. (Rear chassis) 14 is sandwiched between. The main components sandwiched between the frame 13 and the chassis 14 include at least the liquid crystal panel 11, the optical member 15, the light guide plate 16, the LED unit (light source unit) LU, and the reflection sheet 20. It is. 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 illumination device 12 mainly includes an optical member 15, a light guide plate 16, an LED unit LU, a chassis 14, and a reflection sheet 20. The LED unit LU is arranged between the frame 13 and the chassis 14 along the two end faces 16c and 16d on the long side of the light guide plate 16, respectively.

The liquid crystal panel 11 has a horizontally long rectangular shape as a whole, and a pair of

glass substrates

11a and 11b having excellent translucency are bonded together with a predetermined gap therebetween, and between the two substrates. It has a configuration in which liquid crystal is sealed. Of the pair of

substrates

11a and 11b, the front side is a color filter substrate (hereinafter referred to as CF substrate) 11a, and the back side (back side) is an array substrate 11b. The array substrate 11b is provided with a switching element (for example, TFT: Thin Film Transistor) connected to a source wiring and a gate wiring orthogonal to each other, a pixel electrode connected to the switching element, and an alignment film. Yes. On the other hand, the CF substrate 11a has a color filter (CF) and counter electrodes in which colored portions such as R (red), G (green), and B (blue) are arranged in a predetermined arrangement, and an alignment film. Etc. are provided. A polarizing plate is disposed outside each of the

substrates

11a and 11b.

The liquid crystal panel 11 is placed on the front side of the optical member 15 so as to be laminated, and the back surface (the outer surface of the polarizing plate on the back side) is in close contact with the optical member 15 with almost no gap. Thereby, it is possible to prevent dust and the like from entering between the liquid crystal panel 11 and the optical member 15. The display surface 11c of the liquid crystal panel 11 is a non-display having a region (display region) on the center side of the screen where images can be displayed and a frame shape (frame shape) surrounding the display region on the outer peripheral side of the screen. It consists of an area. The liquid crystal panel 11 is connected to a control board CTB via a driver component for driving liquid crystal or a flexible board, and an image is displayed in a display area on the display surface 11c based on a signal input from the control board CTB. It has become so.

The optical member 15 has a horizontally long rectangular shape as a whole, like the liquid crystal panel 11. The size (short side dimension and long side dimension) of the optical member 15 is set to be substantially the same as the front surface 16 a of the liquid crystal panel 11 and the light guide plate 16. The optical member 15 is placed on the front side (light emitting side) of the light guide plate 16 in a stacked manner. Further, the optical member 15 is arranged in a state of being sandwiched between the liquid crystal panel 11 and the light guide plate 16. In the case of this embodiment, the optical member 15 consists of a laminate of three optical sheets. Specifically, it consists of a laminate of a diffusion sheet 15a, a lens sheet 15b, and a reflective polarizing sheet 15c. As shown in FIGS. 3 and 4, among these optical sheets, the diffusion sheet 15a is disposed on the lowermost side, and the reflective polarizing sheet 15c is disposed on the uppermost side.

Note that at least one of the light exit surface 16a and the opposite plate surface 16b of the light guide plate 16 has a reflecting portion (not shown) for reflecting internal light or a scattering portion (not shown) for scattering internal light. ) Is patterned with a predetermined in-plane distribution, and thereby, the emitted light from the light emitting surface 16a is controlled to have a uniform distribution in the surface.

The light guide plate 16 is made of a synthetic resin (for example, acrylic resin or polycarbonate such as PMMA) having a refractive index sufficiently higher than air and substantially transparent (excellent translucency). Like the liquid crystal panel 11 and the optical member 15, the light guide plate 16 has a horizontally long rectangular shape when viewed in plan and has a plate shape that is thicker than the optical member 15. In each drawing, the light guide plate 16 has a long side direction on the plate surfaces 16a and 16b that matches the X-axis direction, a short side direction on the plate surfaces 16a and 16b matches the Y-axis direction, and the plate surface The plate thickness direction (thickness direction) orthogonal to 16a and 16b is shown to coincide with the Z-axis direction. The light guide plate 16 is disposed so as to overlap the back side of the optical member 15, and is sandwiched between the optical member 15 and the chassis 14. The light guide plate 16 is provided with LED units LU along the long side direction, and light from the LED light source 17 is introduced into the end faces 16c and 16d in the long side direction, respectively. . The light guide plate 16 has a function of raising and emitting the light from the LED light source 17 introduced from the end face 16c toward the optical member 15 side (front side) while propagating the light from the inside.

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 four end surfaces surrounding the plate surfaces 16a and 16b of the light guide plate 16, both end surfaces 16c and 16d on the long side extending in the X-axis direction are respectively LED light sources 17 (LED mounting members 18). Are opposed to each other at a predetermined interval, and these are light incident surfaces 16c and 16d on which the light emitted from the LED light source 17 is incident. The light incident surfaces 16c and 16d are surfaces extending along the X-axis direction and the Z-axis direction (the light source mounting surface 18a of the LED mounting member 18), respectively, and are substantially orthogonal to the light emitting surface 16a. Further, the alignment direction of the LED light source 17 and the light incident surfaces 16c and 16d coincides with the Y-axis direction.

As shown in FIGS. 3 and 4, the reflection sheet 20 is provided so as to cover the entire plate surface 16 b on the back side of the light guide plate 16, and the light emitted from the plate surface 16 b to the outside is guided to the light guide plate. 16 is provided with a function of reflecting to the light exit surface 16a side (front side plate surface 16a side) so as to return to the inside. As the reflection sheet 20, a white sheet-like member whose surface is excellent in light reflectivity is used. The reflection sheet 20 is made of a foamed plastic sheet such as a foamed polyethylene terephthalate sheet. The reflection sheet 20 has a rectangular shape as a whole, like the liquid crystal panel 11 and the like.

FIG. 5 is a perspective view of the LED unit LU. The LED unit (an example of a light source unit) mainly includes a plurality of LED light sources (an example of a light source) 17 and an LED mounting member (an example of a light source mounting member) 18 on which pattern wirings 71 are formed.

The LED light source 17 is composed of a plurality of LED chips, which are light emitting elements, sealed in a housing with a resin material (so-called LED package), and is configured to emit white light. For example, the LED light source 4 includes three types of LED chips having different main emission wavelengths. Specifically, each LED chip has red (R), green (G), and blue (B). It is configured to emit monochromatic light. The LED light source 17 is not limited to such a configuration, and may have another configuration. Other configurations of the LED light source 17 include, for example, a built-in LED chip that emits blue (B) in a single color, a phosphor having an emission peak in the red (R) region, and an emission peak in the green (G) region. The LED chip may be covered with a resin (for example, a silicon-based resin) mixed with a phosphor having the above. Further, as another configuration, a resin (for example, a silicon-based resin) in which an LED chip that emits blue (B) in a single color is incorporated and a phosphor that emits yellow light such as YAG (yttrium, aluminum, garnet) phosphor is mixed. ), The LED chip may be covered.

As shown in FIG. 5, the LED mounting member 18 has a prismatic shape extending along the long side direction of the light guide plate 16 (chassis 14). The cross-sectional shape in the short direction of the LED mounting member 18 is a vertically long rectangular shape (rectangular shape) as shown in FIG. The LED mounting member 18 includes a light source mounting surface 18a disposed so as to face the light incident surface 16c of the light guide plate 16, an upper side (front side) adjacent surface 18b adjacent in the longitudinal direction of the light source mounting surface 18a, A lower side (back side) adjacent surface 18c adjacent along the longitudinal direction of the light source mounting surface 18a, a back surface 18d disposed on the opposite side of the light source mounting surface 18a, and end portions in the longitudinal direction of the light source mounting surface 18a. Side surfaces 18e and 18f are provided.

The light source mounting surface 18a has a rectangular shape that is elongated along the longitudinal direction (X-axis direction) of the LED mounting member 18. On this light source mounting surface 18a, a plurality of LED light sources 17 are surface mounted in a state of being aligned in a line along the longitudinal direction. The LED light sources 17 are arranged in a state where a predetermined interval is maintained. The external shape of the LED light source 17 mounted on the light source mounting surface 18a is a substantially rectangular parallelepiped shape. Of the surface of the LED light source 17 having a substantially rectangular parallelepiped shape, a portion (surface) facing the light incident surface 16c of the light guide plate 16 is a light emitting surface 17a. On the back side of each LED light source 17, an anode side (+ side) terminal (not shown) and a cathode side (− side) terminal (not shown) are provided. A terminal on the anode side of each LED light source 17 is arranged on the side surface 18f side, and a terminal on the cathode side of each LED light source 17 is arranged on the side surface 18e side. The vertical width of the light source mounting surface 18a (the length of the light source mounting surface 18a in the short direction and the length of the light source mounting surface 18a in the Z-axis direction) is the vertical width of the LED light source 17 (the short direction of the light emitting surface 17a). The length is set slightly larger than the length in the Z-axis direction of the light emitting surface 17a.

The LED light sources 17 mounted on the light source mounting surface 18a are electrically connected to each other by a pattern wiring 71. The pattern wiring 71 is provided on the light source mounting surface 18a so as to electrically connect adjacent LED light sources 17 to each other. Further, the pattern wiring 71 is formed not only on the light source mounting surface 18a but also on the upper adjacent surface 18b adjacent along the longitudinal direction of the light source mounting surface 18a. That is, the pattern wiring 71 is formed from the light source mounting surface 18a to the adjacent surface 18b. The pattern wiring 71 on the light source mounting surface 18a and the pattern wiring 71 on the adjacent surface 18b are formed continuously with each other. One end side of the pattern wiring 71 is a power supply side, and the other end side is a ground (GND) side. The pattern wiring 71 is connected to an external drive control circuit (PWB substrate) that supplies power and control signals necessary for lighting each LED light source 17 via a relay connector (not shown).

The adjacent surface 18 b has a rectangular shape extending along the longitudinal direction (X-axis direction) of the LED mounting member 18. In the present embodiment, the width of the adjacent surface 18b in the short direction is set narrower (smaller) than the vertical width of the light source mounting surface 18a. Of each surface of the LED mounting member 18, the adjacent surface 18 b is assigned together with the light source mounting surface 18 a as a region (pattern wiring forming surface) where the pattern wiring 71 is formed. The lower adjacent surface 18c has a rectangular shape extending along the longitudinal direction (X-axis direction) of the LED mounting member 18 like the upper adjacent surface 18d. In the present embodiment, the pattern wiring 71 is not formed on the lower adjacent surface 18c, and the pattern wiring 71 is not formed on the both

side surfaces

18e and 18f.

FIG. 6 is a cross-sectional view taken along line A-A ′ of FIG. The LED mounting member 18 is made of a metal material such as aluminum, and is formed on the base 80 having a prismatic base 80 extending in the longitudinal direction while forming a rectangular (rectangular) cross section in the short side direction. An insulating layer 72 made of synthetic resin, a pattern wiring 71 made of a metal film such as a copper foil formed on the insulating layer 72, and formed on the insulating layer 72 so as to cover the pattern wiring 71. And a solder resist layer 73 made of a white insulating film. As shown in FIG. 5, the insulating layer 72 and the solder resist layer 73 are formed on the light source mounting surface 18a and the upper adjacent surface 18b. The pattern wiring 71 is formed using a known printed wiring technique.

The LED unit LU is supported by the heat radiating member (light source support member) 19 so that the light source mounting surface 18a and the light emitting surface 17a of the LED light source 17 are opposed to the light incident surfaces 16c and 16d of the light guide plate 16. It is arranged in the space between the frame 13 and the chassis 14.

The heat dissipating member 19 is made of a metal having excellent thermal conductivity such as aluminum. The heat dissipating member 19 includes an elongated plate-like attachment portion 19 a to which the LED mounting member 18 is attached, and an elongated plate-like heat radiation portion 19 b in surface contact with the plate surface of the chassis 14. The attachment portion 19a and the heat radiating portion 19b have a bent shape having a substantially L-shaped cross section as a whole. The mounting portion 19a has a plate shape arranged in parallel with respect to the plate surface 18a of the LED mounting member 18 and the light incident surface 16c of the light guide plate 16, and the long side direction thereof 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 mounting member 18 is attached to the inner plate surface of the attachment portion 19a (that is, the plate surface facing the light guide plate 16 side). The mounting portion 19 a has a long side dimension set to be approximately the same as the long side dimension of the LED mounting member 18, and the short side dimension is set slightly larger than the short side dimension of the LED mounting member 18. Yes. A plate surface outside the mounting portion 19a (that is, a plate surface opposite to the plate surface on which the LED mounting member 18 is mounted) faces a first protrusion 31 included in the frame 13 described later. That is, the attachment portion 19 a is arranged in a form that is interposed between the first projecting portion 31 of the frame 13 and the light guide plate 16. The attachment portion 19 a is in surface contact with the first protrusion 31. Therefore, the heat generated from the LED light source 17 with the lighting can be moved to the frame 13 having the first projecting portion 31 via the LED mounting member 18 and the mounting portion 19a, and released (radiated) to the outside. . The mounting portion 19a has a shape that rises from the inner end portion (that is, the end portion on the LED light source 17 side) of the heat radiating portion 19b toward the front side (that is, the frame 13 side) along the Z-axis direction. The LED unit LU is fixed to the mounting portion 19a of the heat radiating member 19 using fixing means such as screws.

The heat dissipating part 19b has a plate shape arranged in parallel to the plate surface of the chassis 14, the long side direction thereof coincides with the X axis direction, the short side direction thereof coincides with the Y axis direction, and the thickness thereof. The direction coincides with the Z-axis direction. The entire plate surface on the back side of the heat radiating portion 19b (that is, the plate surface facing the chassis 14) is in surface contact with the plate surface of the chassis 14. Therefore, the heat generated from the LED light source 17 along with the lighting can be moved to the chassis 14 via the LED mounting member 18, the mounting portion 19a, and the heat radiating portion 19b, and released (heat radiated) to the outside. The long side dimension of the heat dissipating part 19b is set to be substantially the same as that of the attaching part 19b. A plate surface on the front side of the heat radiating portion 19b (that is, a plate surface opposite to the contact surface with respect to the chassis 14) faces a first projecting portion 31 of the frame 13 described later. That is, the heat radiating portion 19 b is arranged in a form that is interposed between the first projecting portion 31 of the frame 13 and the chassis 14. The heat dissipating part 19 b is brought into surface contact with the first projecting part 31 in addition to the chassis 14, so that the heat from the LED light source 17 can be moved to the frame 13. And since this thermal radiation part 19b is attached with respect to the 1st protrusion part 31 using the screw member SM, it has the penetration hole 19c for letting the screw member SM pass. The heat radiating portion 19b is directed from the back side (lower side) end portion (that is, the end portion on the chassis 14 side) of the mounting portion 19a toward the outside (that is, opposite to the light guide plate 16 side) along the Y-axis direction. It has a protruding shape.

The frame 13 as a whole has a frame shape (frame shape) surrounding a peripheral portion (non-display area) on the display surface 11c of the liquid crystal panel 11, and is made of a metal material having excellent heat dissipation such as aluminum. The frame 13 is formed of a predetermined shape using a mold, for example. The frame 13 is a portion constituting a frame-shaped front surface portion 13a disposed on the front side of the liquid crystal display unit LDU (liquid crystal display device 10) and a peripheral portion of the liquid crystal display unit LDU (liquid crystal display device 10). And a frame-shaped (tubular) peripheral wall portion 13b extending from the outer peripheral edge portion 13a toward the back side. The frame 13 is a member that shapes the outer appearance of the front side of the liquid crystal display unit LDU (liquid crystal display device 10).

The front surface portion 13a has a generally horizontally long rectangular shape when viewed from the front side. The display surface 11c (display region) of the liquid crystal panel 11 is exposed from the opening inside the frame-shaped front surface portion 13a. A first projecting portion 31, a second projecting portion 32, and a third projecting portion 33 are provided on the back side of the front surface portion 13a in order from the outer edge side toward the inner edge side.

The 1st protrusion part 31 is a part to which the heat radiating member 19 is fixed directly. The first protruding portion 31 protrudes toward the back side (chassis 14 side) and extends along the long side direction of the front surface portion 13a. In addition, the 1st protrusion part 31 becomes a shape protruded toward the back side most compared with the

other protrusion parts

32 and 33. As shown in FIG. In the case of this embodiment, the 1st protrusion part 31 is each provided in the part of the two long sides of the front surface part 13a. The heat radiating member 19 is fixed to each first protrusion 31. The first protrusion 31 is formed with a groove 30 that opens toward the back side and extends along the long side direction. The groove portion 30 is used as a screw receiver into which the screw member SM is inserted and screwed when the heat radiating member 19 and the chassis 14 are fixed to the first projecting portion 31 using the screw member SM.

The second projecting portion 32 is a portion that has its tip portion in contact with the peripheral portion of the front plate surface 16a of the light guide plate 16 and presses the light guide plate 16 toward the chassis 14 side. The second protrusion 32 has a frame shape as a whole when the frame 13 is viewed from the back side. A buffer material 35 made of an elastic body such as rubber having a light shielding property is provided on the inner side (inner edge side) of the second protrusion 32. By the buffer material 35, the contact between the second projecting portion 32 and the end portion of the liquid crystal panel 11 is relaxed.

The tip of the third protrusion 33 is in contact with the peripheral portion (non-display area) of the plate surface (display surface 11c) on the front side (CF substrate 11a side) of the liquid crystal panel 11, so that the liquid crystal panel 11 is placed on the chassis 14 side. It is a portion to be pressed toward the (light guide plate 16 side). In addition, the 3rd protrusion part 33 has comprised the shape protruded the smallest compared with the

other protrusion parts

31 and 32. FIG. The third protrusion 33 has a frame shape as a whole when the frame 13 is viewed from the back side. A buffer material 37 made of the same material as the buffer material 35 is provided at the tip of the third protrusion. The third projecting portion 33 is configured to come into contact with the peripheral portion of the liquid crystal panel 11 through the buffer material 37.

The peripheral wall portion 13b has a substantially rectangular tube shape as a whole. The peripheral wall portion 13b surrounds the periphery of the laminate composed of the liquid crystal panel 11, the optical member 15, the light guide plate 16, and the reflection sheet 20 over the entire circumference. Further, the peripheral wall portion 13 b surrounds the chassis 14 in a state where the inner portion thereof is in contact with the peripheral portion of the chassis 14.

The chassis 14 is generally composed of a horizontally long plate-like member like the liquid crystal panel 11 and covers the liquid crystal display unit LDU (liquid crystal) so as to cover the plate surface 16b on the back side of the light guide plate 16 and the like. It is arranged on the back side (back side) of the display device 10). The chassis 14 is a member that shapes the appearance of the back side of the liquid crystal display unit LDU (liquid crystal display device 10). The chassis 14 includes a rectangular plate-shaped chassis main body portion 14a and a side edge portion 14b erected along an end portion on the long side of the chassis main body portion 14a. The chassis main body 14 a is a part mainly addressed to the plate surface 16 b on the back side of the light guide plate 16 through the reflection sheet 20. Further, the chassis body 14 a is in close contact with the plate surface 16 b on the back side of the light guide plate 16 through the reflection sheet 20. The chassis body 14a includes a central portion 14a1 that covers the plate surface 16b on the back side of the light guide plate 16, and an outer portion 14a2 that is disposed outside the central portion 14a1 and covers the LED unit LU. The central portion 14a1 and the outer portion 14a2 are connected to each other and have a flat plate shape. The side edge portion 14b has a shape that rises from the end of the chassis main body portion 14a toward the front side (upper side), and is in close contact with the inner side of the peripheral wall portion 13b.

Two types of insertion holes, large and small, are provided in the end portion on the long side of the chassis 14 (that is, the outer portion 14a2). One large insertion hole 14c is for exposing an end portion (head portion) of the screw member SM used when the heat radiating member 19 is fixed to the first projecting portion 31, and an end portion of the screw member SM. It is set larger than (head). On the other hand, the other small insertion hole 14 d is a hole through which the screw member SM used for fixing the chassis 14 to the frame 13 is inserted. The chassis 14 further includes the screw member SM inserted into the insertion hole 14d and the screw member SM inserted into a predetermined insertion hole 19c provided in the heat dissipation member 19 (heat dissipating portion 19b). The screw member SM is fixed to the frame 13 by being screwed while being inserted into the groove portion 30. 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 the LED unit LU arranged on the periphery thereof are combined with the frame. 13 and the chassis 14 are held. The chassis 14 is made of a metal material such as aluminum, like the frame 13, and is made of, for example, a predetermined shape using a mold.

The liquid crystal display device 10 (liquid crystal display unit LDU) including the above-described components is assembled by the following work procedure. As a work procedure, first, the frame 13 is installed on a predetermined work table (not shown). The frame 13 on the work table is in a state where the front side faces downward and the back side faces upward. Next, the liquid crystal panel 11 is assembled on the upper side of the frame 13 installed 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 and the array substrate 11b is disposed on the upper side. The CF substrate 11 a side of the liquid crystal panel 11 is placed on the third projecting portion 33 of the frame 13 via a buffer material 37. After the liquid crystal panel 11 is assembled to the frame 13, the optical member 15 is placed on the back side (array substrate 11 side) of the liquid crystal panel 11.

Next, the heat radiating member 19 to which the LED unit LU is attached is fixed on the first projecting portion 31 of the frame 13 using the screw member SM. The heat dissipating member 19 is placed on the first projecting portion 31 with the mounting portion 19a disposed on the lower side and the heat dissipating portion 19b disposed on the upper side. And in the state mounted on the thermal radiation member 19 and the 1st projection part 31, it is fixed with respect to the 1st projection part 31 with the screw member SM.

Next, the light guide plate 16 is placed on the optical member 15. At that time, the light guide plate 16 is in a state in which the front plate surface 16a is arranged on the lower side and the rear plate surface 16b is arranged on the upper side. The light guide plate 16 is placed on the frame 13 such that the peripheral portion of the front plate surface 16 a is in contact with the second protrusion 32 of the frame 13. The light guide plate 16 is positioned with respect to the frame 13 so that the distance (distance) between the end surfaces (light incident surfaces) 16c and 16d and the LED unit LU is a predetermined distance.

Next, the reflection sheet 20 is placed on the plate surface 16 b on the back side of the light guide plate 16. And the chassis 14 is assembled | attached to the flame | frame 13 in the state mounted on the board surface 16b of the light-guide plate 16 via the reflective sheet 20. As shown in FIG. As described above, the chassis 14 is fixed to the first protrusion 31 of the frame 13 using the screw member SM. The components of the liquid crystal display unit LDU (liquid crystal display device 10) are assembled by the above operation procedure.

Thereafter, the liquid crystal display unit LDU is assembled with the stand mounting member STA and the various substrates PWB, MB, and CTB on the back side thereof, and further the stand ST and the cover member CV are assembled, whereby the liquid crystal display device of the present embodiment. 10 and the television receiver TV are manufactured.

When the power supply of the liquid crystal display device 10 is turned on, power is supplied from the power supply substrate PWB, and various signals are supplied from the control substrate CTB to the liquid crystal panel 11 to control the driving thereof, and the illumination device 12 is also controlled. Each LED17 light source which comprises is driven. When each LED light source 17 is driven and light is emitted from each LED light source 17, the light is incident on the light incident surfaces 16 c and 16 d 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 proceeds in 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 to become light that spreads substantially uniformly in a planar shape, and illuminates the back surface of the liquid crystal panel 11. The liquid crystal panel 11 displays an image on the display surface 11c by using the light spread in a planar shape.

In the liquid crystal display device 10 of the present embodiment, the vertical width D2 of the LED light source 17 included in the LED unit LU is set slightly smaller than the vertical width (thickness of the light guide plate 16) D3 of the light incident surface 16c of the light guide plate 16. However, they are approximately the same size. In this specification, when the vertical width D2 of the LED light source 17 and the vertical width (thickness) D3 of the light guide plate 16 are substantially the same, specifically, the relational expression 0.8 ≦ D2 / D3 ≦ 1 is satisfied. This is the case. Further, the vertical width D1 of the LED mounting member 18 is set slightly larger than the vertical width D2 of the LED light source 17. In the present embodiment, the vertical width D1 of the LED mounting member 18 is set to be substantially the same as the vertical width D3 of the light guide plate 16.

In the LED unit LU, the pattern wiring 71 for supplying power to each LED light source 17 is not only the light source mounting surface 18a on which the LED light source 17 is mounted, but also the upper side adjacent along the longitudinal direction of the light source mounting surface 18a. It is also formed on the adjacent surface 18b. That is, the pattern wiring 71 is formed from the light source mounting surface 18a to the adjacent surface 18b. Thus, by assigning an area (space) necessary for forming the pattern wiring 71 not only to the light source mounting surface 18a but also to the adjacent surface 18b, the vertical width D2 of the light source mounting surface 18a is set to the conventional light source mounting surface. It can be set smaller than the vertical width (when a region necessary for forming the pattern wiring is assigned only to the light source mounting surface). As a result, the vertical width D2 of the light source mounting surface 18a can be set to substantially the same size as the vertical width D3 of the light guide plate 16. Therefore, the LED unit LU of the present embodiment has a small size in the vertical width D1 direction, and is downsized (thinned).

In the liquid crystal display device 10 of the present embodiment, the liquid crystal panel 11 is placed on the front surface 16 a of the light guide plate 16 via the optical member 15, and further on the peripheral edge of the liquid crystal panel 11 in that state. The frame 13 that forms the front side appearance is covered. The frame 13 holds a laminate composed of the liquid crystal panel 11, the optical member 15, the light guide plate 16, and the reflection sheet 20, and the LED unit LU disposed on the periphery of the laminate between the chassis 14. is doing. In the present embodiment, the external appearance of the liquid crystal display device 10 is formed by the frame 13 and the chassis 14 that directly hold and hold the main components such as the liquid crystal panel 11, the light guide plate 16, and the LED unit LU. The shape reflects the shape (size) of the LED unit LU. That is, as described above, when the LED unit LU is downsized (thinned) and the line width D1 is set small, the shape of the frame 13 and the chassis 14 that sandwich the LED unit LU is flat. It becomes possible to set it to a shape. In particular, in the present embodiment, by using the downsized (thinned) LED unit LU, the plate surface 16b on the back side of the light guide plate 16, the heat radiating member 19 that supports the LED unit LU, and the like directly. The contacting chassis 14 (chassis body 14a) can be set in a flat plate shape. That is, a step that causes a decrease in design (design) between the portion (center portion) 14a1 that covers the plate surface 16b on the back side of the light guide plate 16 and the portion (outer portion) 14a2 that covers the LED unit LU. The chassis 14 (chassis body 14a) can be set to a flat shape without being formed. Therefore, the liquid crystal display device 10 of the present embodiment includes the LED unit LU that is downsized (thinned), thereby increasing the degree of freedom of the external shape that forms the front side and the back side. As in this embodiment, the liquid crystal display device 10 having a small thickness (length in the Z-axis direction) and a flat appearance on the front side and the back side has good design (designability).

Further, in the liquid crystal display device 10 of the present embodiment, the adjacent surface 18b on which the pattern wiring 71 is formed is disposed on the side opposite to the light emitting side (the light emitting surface 16a side). It is not arranged between the LED light source 17 and the light incident surface 16 a of the light guide plate 16. Therefore, it is possible to set the distance between the light emitting surface 17a at the tip of the LED light source 17 and the light incident surface 19a of the light guide plate 16 to be narrow (small). In other words, in the liquid crystal display device 10 of the present embodiment, the interval between the LED light source 17 and the light incident surface 16a of the light guide plate 16 is set to be narrow, and the incident efficiency of the light emitted from the LED light source 17 on the light incident surface 16a ( Light incident efficiency) can be increased.

Further, in the liquid crystal display device 10 of the present embodiment, the LED mounting member 18 provided in the LED unit LU has a rectangular column shape with a square cross section. The LED mounting member 18 includes a base material 80 having a quadrangular prism shape in cross section. Thus, when the LED mounting member 18 (base material 80) has a prismatic shape, the overall shape (overall structure) of the LED mounting member 18 is stabilized, and the adjacent surface 18b on which the pattern wiring 71 is formed is light source mounted. Displacement with respect to the surface 18a is suppressed.

<Embodiment 2>
Hereinafter, 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. Detailed description thereof is omitted. FIG. 7 is a partial cross-sectional view showing a part of a cross-sectional configuration along the short side direction of the liquid crystal display device 10A according to the second embodiment, and FIG. 8 is a perspective view of the LED unit LUA according to the second embodiment. . The basic configuration of the liquid crystal display device 10A of the present embodiment is the same as that of the first embodiment. However, the LED unit LUA provided in the liquid crystal display device 10A of the present embodiment is different from that of the first embodiment.

As shown in FIGS. 7 and 8, the LED unit LUA includes a plurality of LED light sources 17, an LED mounting member 118 on which the LED light sources 17 are mounted, and a pattern wiring 71A. The LED mounting member 118 extends in the longitudinal direction and has a plate-like light source mounting portion 118a1 on which the LED light source 17 is mounted, a plate-like adjacent portion 118b1 disposed above the light source mounting portion 118a1, and a light source mounting portion 118a1. And a plate-like adjacent portion 118c1 disposed on the lower side. Both the adjacent portion 118b1 and the adjacent portion 118c1 are arranged vertically from the light source mounting portion 118a1 toward the rear (opposite side to the light emission side of the LED light source 17). The cross-sectional shape of the LED mounting member 118 in the short direction is a concave shape opening toward the rear (opposite the light emitting side). That is, a hollow space surrounded by the light source mounting portion 118a1 and both adjacent portions 118b1 and 118c1 is formed behind the LED mounting member 118 (on the side opposite to the light emitting side). The surface of the light source mounting portion 118a1 is the light source mounting surface 118a, and the surface of the upper adjacent portion 118b1 is the adjacent surface 118b. The pattern wiring 71A is formed from the light source mounting surface 118a to the upper adjacent surface 118b. Although the surface of the lower adjacent portion 118c1 is also the adjacent surface 118c, in this embodiment, the pattern wiring 71A is not formed on the adjacent surface 118c.

FIG. 9 is an explanatory diagram of the LED unit LUA in a state of being flattened. The LED mounting member 118 shown in FIG. 8 is obtained by bending the LED mounting member 118 in a flat state shown in FIG. 9 at a predetermined position. A known bending process is used for bending the LED mounting member 118. The pattern wiring 71 </ b> A is formed by using a printed wiring technique after forming an insulating layer on the base material 80 </ b> A that is spread in a planar shape, as in the first embodiment. A solder resist layer is formed on the pattern wiring 71A as in the first embodiment. Each LED light source 17 is also mounted in a line on the light source mounting surface 118a while maintaining a predetermined interval, as in the first embodiment.

Also in the LED unit LUA of the present embodiment, as in the first embodiment, the area (space) necessary for forming the pattern wiring 71A is allocated not only to the light source mounting surface 118a but also to the adjacent surface 118b, thereby implementing the light source mounting. The vertical width (length in the Z-axis direction) of the surface 118a is smaller than the vertical width of the conventional light source mounting surface (when a region necessary for forming the pattern wiring is allocated only on the light source mounting surface). Can be set. Therefore, the LED unit LUA of the present embodiment is also downsized (thinned) as in the first embodiment. Further, the liquid crystal display device 10A including such an LED unit LUA is also downsized (thinned) in the thickness direction (Z-axis direction).

The mounting portion 19a of the heat radiating member 19A is provided with a convex portion 19d extending along the longitudinal direction of the LED unit LUA. The LED unit LUA is fixed to the mounting portion 19a in a state where the convex portion 19d is fitted in the space of the LED unit LUA. The LED unit LUA has a larger contact area with the heat radiating member 19A than that of the first embodiment, and is excellent in heat dissipation.

<Embodiment 3>
Next, Embodiment 3 of the present invention will be described with reference to FIG. FIG. 10 is an explanatory diagram of the LED unit LUB according to the third embodiment. The LED unit LUB of the present embodiment is used in place of the LED unit LUA provided in the liquid crystal display device 10A of the second embodiment. FIG. 10 shows the LED unit LUB in a state of being flattened. Similarly to the LED unit A of the second embodiment, the LED unit LUB also includes a plurality of LED light sources 17, an LED mounting member 18B on which the LED light sources 17 are mounted, and a pattern wiring 71B that electrically connects the LED light sources 17 to each other. It has. The basic configuration of the LED mounting member 218 of the present embodiment is the same as that of the second embodiment, and a plate-like light source mounting portion 218a1 extending in the longitudinal direction along the light incident surface 16c of the light guide plate 16, and An upper adjacent portion 218b1 adjacent along the longitudinal direction of the light source mounting portion 218a1 and a lower adjacent portion 218c1 adjacent along the longitudinal direction of the light source mounting portion 218a1 are provided. That is, the cross-sectional shape in the short direction of the LED mounting member 218 has a concave shape opened toward the rear (opposite the light emitting side). The surface of the light source mounting portion 218a1 is a light source mounting surface 218a, and the surfaces of the adjacent portions 218b1 and 218c1 are

adjacent surfaces

218b and 218c, respectively.

The LED mounting member 218 of the present embodiment is different from that of the second embodiment, and the pattern wiring 71B is also formed on the lower adjacent surface 218c. That is, the pattern wiring 71B is formed from the light source mounting surface 218a to the two

adjacent surfaces

218b and 218c. Through holes 21 used as screw holes are respectively provided at both ends of the light source mounting portion 218b1 having a longitudinal shape. A part of the pattern wiring 71B is formed at the end of the adjacent surface 218c adjacent to the light source mounting surface 218a where the through hole 21 is provided, avoiding the end. Thus, by assigning an area (space) necessary for forming the pattern wiring 71A not only to the light source mounting surface 218a but also to the two

adjacent surfaces

218b and 218c, the vertical width (short direction) of the light source mounting surface 218a. Can be set smaller than the vertical width of the conventional light source mounting surface (when the area necessary for forming the pattern wiring is assigned only to the light source mounting surface). As a result, the vertical width of the light source mounting surface 218a can be set to substantially the same size as the vertical width of the light guide plate 16. Therefore, the LED unit LUB of the present embodiment has a small size in the vertical width direction and is downsized (thinned).

In the LED unit LUB, screws (screws) are inserted into the through holes 21 of the LED mounting member 218, and the screws are screwed to the mounting portion 19a (convex portion 19d), whereby the heat radiating member 19B ( It attaches to FIG. 7 of Embodiment 2. As in the present embodiment, the pattern wiring 71B may be formed not only on the upper adjacent surface 218b but also on the lower adjacent surface 218c.

<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 pattern wiring 71 is formed only on the upper adjacent surface 18b among the two

adjacent surfaces

18b and 18c adjacent to each other along the longitudinal direction of the light source mounting surface 18a. In another embodiment, the pattern wiring 71 may be formed from the light source mounting surface 18a to the lower adjacent surface 18c.

(2) In the first embodiment, the pattern wiring 71 is formed on the adjacent surface 18b adjacent along the longitudinal direction of the light source mounting surface 18a. In another embodiment, a part of the pattern wiring 71 may be formed on a surface adjacent to the light source mounting surface 18a along the short direction (that is, the side surfaces 18e and 18f).

(3) In the first embodiment, the insulating layer 72 and the solder resist layer 73 are formed on the light source mounting surface 18a and the adjacent surface 18b of the base material 80, respectively. In other embodiments, the insulating layer 72 or the like may be formed on the lower adjacent surface 18c or the like where the pattern wiring 71 is not formed.

(4) In the first embodiment, the base material 80 is made of a metal material such as aluminum. In other embodiments, for example, an insulating material such as ceramic may be used as the material of the substrate 80.

(5) In the second embodiment, the LED mounting member 118 is formed by bending the plate-shaped substrate 80A at a predetermined location. In another embodiment, for example, a substrate formed by extrusion molding may be used as the base material 80A having a concave shape whose cross-sectional shape is open toward the rear. That is, the manufacturing method of the base material 80A is not limited. However, as shown in the second embodiment, the LED mounting member 118 (base material 80A) obtained by bending is most preferable because of high productivity.

(6) In the second embodiment, the LED mounting member 118 includes two

adjacent surfaces

118b and 118c (two adjacent portions 118b1 and 118c1) with respect to the light source mounting surface 118a (light source mounting portion 118a1). It was. In another embodiment, for example, the LED mounting member may be configured to include only an upper adjacent surface with respect to the light source mounting surface (that is, the cross-sectional shape in the short direction is a so-called L-shape. Stuff).

(7) In the first embodiment, the television receiver TV is exemplified as the display device. However, in other embodiments, the liquid crystal display device may be used for a mobile phone, a portable information terminal, and the like. In another embodiment, a display device that does not include a tuner unit may be used.

(8) In the first embodiment, the color filter of the liquid crystal panel 11 has three colored portions of R, G, B as examples. However, in other embodiments, the colored portion has four or more colors. Also good. In another embodiment, a liquid crystal display device that performs monochrome display may be used.

(9) In Embodiment 1 described above, a TFT is used as a switching element of a liquid crystal display device, but in other embodiments, a switching element other than a TFT (for example, a thin film diode (TFD)) may be used.

(10) Although the LED 17 is used as the light source in the first embodiment, other light sources may be used in other embodiments.

DESCRIPTION OF SYMBOLS 10 ... Liquid crystal display device (display device), 11 ... Liquid crystal panel (display panel), 12 ... Illumination device (backlight device), 13 ... Frame, 14 ... Chassis, 15 ... Optical member, 16 ... Light guide plate, 16a ... Front side Plate surface (light emitting surface), 16b ... back plate surface, 16c, 16d ... light incident surface, 17 ... LED light source (light source), 18 ... LED mounting member (light source mounting member), 18a ... light source mounting surface, 18b , 18c ... adjacent surface, 19 ... heat dissipation member, 20 ... reflection sheet, 71 ... pattern wiring, LU ... LED unit (light source unit), LDU ... liquid crystal display unit, TV ... TV receiver

Claims

A light source, a light source mounting surface including the light source mounting surface on which the light source is mounted and an adjacent surface adjacent to the light source mounting surface; and a light source mounting member formed from the light source mounting surface to the adjacent surface and connected to the light source. A light source unit having a pattern wiring for supplying power to the light source;
A plate-shaped member, which is composed of one end surface of the plate-shaped member, a light incident surface on which light from the light source is incident, and a light incident surface composed of a front-side plate surface of the plate-shaped member. A light guide plate having a light exit surface for emitting light;
A display panel that is addressed to the light exit surface and displays an image using light emitted from the light exit surface;
A chassis addressed to the plate surface on the back side of the light guide plate;
A display device comprising: a frame that covers a peripheral portion on a front side of the display panel and holds the light source unit, the display panel, and the light guide plate between the chassis and the chassis.
The display device according to claim 1, wherein the chassis forms a back side appearance, and the frame forms a front side appearance.
The display device according to claim 1, wherein the light source mounting surface is disposed so as to face the light incident surface.
The display device according to any one of claims 1 to 3, wherein the adjacent surface is disposed so as to spread on a side opposite to a light emitting side of the light source.
The display device according to any one of claims 1 to 4, wherein the light source mounting member has a columnar shape with a polygonal cross section.
The display device according to claim 1, wherein a vertical width of the light source mounting surface in a direction corresponding to a thickness direction of the light guide plate is set to be substantially the same as a thickness of the light guide plate. .
The display device according to any one of claims 1 to 6, wherein a portion covering the light source unit and a portion covering the light guide plate in the chassis form a flat plate shape connected to each other.
The display device according to any one of claims 1 to 7, wherein the pattern wiring is formed of a metal thin film formed using a printed wiring technology.
The display device according to any one of claims 1 to 8, wherein the light source is an LED light source.
The display device according to any one of claims 1 to 9, 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.