WO2013094509A1

WO2013094509A1 - Display device, and television receiving device

Info

Publication number: WO2013094509A1
Application number: PCT/JP2012/082320
Authority: WO
Inventors: 譲生田; 智之市座
Original assignee: シャープ株式会社
Priority date: 2011-12-20
Filing date: 2012-12-13
Publication date: 2013-06-27

Abstract

A liquid crystal display device (10) is provided with: LEDs; a liquid crystal panel (11); a light-guide plate (16) which guides light from the LEDs towards the liquid-crystal panel (11) and which has a notch in the end surface; a chassis (14) arranged on the side of the light-guide plate (16) opposite of the liquid crystal panel (11); a frame (13) which is arranged on the display side of the liquid-crystal panel (11), and which, together with the chassis (14), holds and houses the liquid crystal panel (11), the LEDs and the light-guide plate (16), said frame (13) having a protrusion (23) protruding towards the chassis (14); and a positioning member (30) which is housed inside the notch (16s) and which, by fitting with the notch (16s), positions the light-guide plate (16) between the frame (13) and the chassis (14), wherein said positioning member (30) is fixed with a screw, the rotational axis direction being the direction orthogonal to the thickness direction (Z axis direction) of the light-guide plate (16) relative to the protrusion (23).

Description

Display device and television receiver

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

In recent years, display elements of image display devices such as television receivers are shifting from conventional cathode ray tubes to thin display devices to which thin display elements such as liquid crystal panels and plasma display panels are applied. Is possible. The liquid crystal display device requires a backlight device as a separate illumination device because the liquid crystal panel used for this does not emit light. As an example of such a backlight device, an edge light type backlight device in which a light incident surface is provided on a side surface of a light guide plate and a light source such as an LED is disposed on a side surface side of the light guide plate is known.

In an edge light type backlight device, a configuration is known in which a light guide plate is positioned in a housing by providing a positioning member in a part of the housing and abutting or fitting with an end portion of the light guide plate. For example, Patent Literature 1 discloses a liquid crystal display device including an edge light type backlight device in which such a positioning configuration is realized.

JP 2004-247285 A

(Problems to be solved by the invention)
By the way, the positioning member as described above is attached to a part of the chassis by screwing or the like after the light guide plate is accommodated in the chassis in the manufacturing process of the liquid crystal display device. When it is attached by screwing, when the screw is fixed to the chassis, the positioning member may rotate along the rotation direction of the screw, and the positioning member may contact the light guide plate.

Here, in the liquid crystal display device of Patent Document 1 described above, a plurality of stopper fittings as positioning members for holding the light guide plate and positioning the light guide plate in the chassis are attached to the side plates of the chassis by screws. However, since these stopper fittings are screwed with the thickness direction of the light guide plate as the rotation axis direction, when the stopper fitting is attached to the chassis in the manufacturing process of the liquid crystal display device, the stopper fitting rotates to rotate the light guide plate. , The light guide plate is pushed by the positioning member and rotated along the plate surface direction, and the light guide plate may be displaced. If the light guide plate is displaced in the chassis, it causes luminance unevenness on the display surface of the liquid crystal panel.

The technology disclosed in this specification has been created in view of the above problems. The technology disclosed in this specification realizes a configuration in which a light guide plate is positioned in a display device including an edge light type illumination device, and in the manufacturing process, the light guide plate is displaced along the plate surface direction. An object of the present invention is to provide a technique that can prevent this from happening.

(Means for solving the problem)
The technology disclosed in this specification is arranged so as to overlap a light source, a display panel that performs display using light of the light source, and the display panel side opposite to the display surface side, A light guide plate having an end surface facing the light source and guiding light from the light source toward the display panel, the light guide plate having a notch provided in the end surface, and the light guide plate On the other hand, the chassis disposed on the opposite side of the display panel and the display panel side of the display panel are accommodated in such a manner that the display panel, the light source, and the light guide plate are sandwiched between the chassis and the chassis. A frame having a projecting portion protruding toward the chassis, and the light guide plate is accommodated in the notch and fitted into the notch so that the light guide plate is interposed between the frame and the chassis. Positioning part for positioning A is relates to a display device and a positioning member that is screwing a rotation axis direction and a direction perpendicular to the thickness direction of the light guide plate with respect to the projecting portion.

According to such a display device, since the positioning member is accommodated in the notch and fitted, the chassis and the light guide plate are fitted, so that the configuration in which the light guide plate is positioned can be realized. it can. Since the rotation axis direction of the screw for fastening the positioning member is orthogonal to the thickness direction of the light guide plate, positioning is performed when the positioning member is screwed after positioning the light guide plate in the manufacturing process of the display device. Even if the member rotates around its rotation axis and contacts the notch portion of the light guide plate, the positioning member does not rotate in the rotation direction around the thickness direction of the light guide plate. It is possible to prevent rotation in the direction of rotation around the shaft. For this reason, it is possible to prevent the light guide plate from being displaced along the plate surface direction in the manufacturing process while realizing a configuration in which the light guide plate is positioned in the display device including the edge light type illumination device. it can.

The positioning member may extend in a plate shape in a direction inclined with respect to the plate surface of the light guide plate, and may have a pair of inclined portions arranged in an opposing manner.
According to this configuration, light leaking into the positioning member from the end surface of the light guide plate is reflected by the pair of inclined portions and reflected in the positioning member, so that the light is prevented from exiting from the positioning member. Can be suppressed. For this reason, it can prevent thru | or suppress that the light which leaked in the positioning member from the end surface of a light-guide plate goes to the display panel side by an inclination part.

The positioning member may have a plate-like portion extending in a plate shape in a direction along the plate surface of the light guide plate.
According to this configuration, by positioning the positioning member so that the plate-like portion comes into contact with the plate surface of the light guide plate, the positioning member rotates in the rotation direction with the direction orthogonal to the thickness direction of the light guide plate as the rotation axis. Can also be prevented.

The plate-like portion may be located between the light guide plate and the chassis.
According to this configuration, light that leaks from the chassis side toward the display panel in the vicinity of the notch can be shielded by the plate-like portion.

A concave groove portion that opens toward the positioning member side is provided in the projecting portion, and the positioning member is arranged with a portion thereof fitted into the groove portion, and from the fitted portion of the light guide plate You may have a contact part extended in plate shape along the thickness direction and contact | abutted with the said groove part.
According to this configuration, the contact portion is in contact with the groove portion, so that it is possible to prevent the positioning member from rotating in the rotation direction with the direction orthogonal to the thickness direction of the light guide plate as the rotation axis.

The positioning member may have a block shape.
According to this configuration, the positioning member can be easily accommodated in the cutout having a rectangular shape in cross section, and the light guide plate can be suitably positioned by the positioning member.

The protrusion may have a column shape.
According to this configuration, one surface of the positioning member having a block shape can be easily attached to the protruding portion.

The positioning member may be hollow.
According to this configuration, the cost of the positioning member can be reduced and the weight of the display device can be reduced.

The positioning member may be made of metal.
According to this configuration, the rigidity of the positioning member can be increased.

The frame may have a contact rib that protrudes in a columnar shape toward the light guide plate and a front end surface of which contacts a plate surface of the light guide plate directed toward the display panel.
According to this configuration, the light guide plate can be supported by pressing the light guide plate from the front side with the contact rib.

In the technology disclosed in this specification, a display device in which the display panel is a liquid crystal panel using liquid crystal is also new and useful. A television receiver provided with the above display device is also new and useful.

(The invention's effect)
According to the technology disclosed in this specification, while realizing a configuration in which a light guide plate is positioned in a display device including an edge light type illumination device, the light guide plate is aligned along the plate surface direction in the manufacturing process. It is possible to provide a technique capable of preventing displacement.

1 is an exploded perspective view showing a schematic configuration of a television receiver TV and a liquid crystal display unit LDU according to Embodiment 1. FIG. Rear view of television receiver TV and liquid crystal display device 10 The exploded perspective view which shows schematic structure of the liquid crystal display unit LDU which comprises the liquid crystal display device 10. FIG. Sectional drawing which shows the cross-sectional structure along the short side direction of the liquid crystal display device 10. Sectional drawing which shows the cross-sectional structure along the long side direction of the liquid crystal display device 10. FIG. 5 is an enlarged sectional view in which the vicinity of the positioning member 30 is enlarged. Rear view of frame 13 and light guide plate 16 An enlarged rear view of the vicinity of the positioning member 30 attached to the frame 13 The perspective view which looked at the vicinity of the positioning member 30 attached to the flame | frame 13 from the back side The perspective view which looked at the process of attaching the positioning member 30 to the flame | frame 13 from the back side The perspective view of the state which turned the positioning member 130 which concerns on Embodiment 2 upside down The top view which looked at the vicinity of the positioning member 130 attached to the flame | frame 130 from the front side The perspective view of the state which turned the positioning member 230 which concerns on Embodiment 3 upside down The perspective view which looked at the vicinity of the positioning member 230 attached to the frame 213 from the back side

<Embodiment 1>
Embodiment 1 will be described with reference to FIGS. In this embodiment, the liquid crystal display device 10 is illustrated. A part of each drawing shows an X-axis, a Y-axis, and a Z-axis, and each axis direction is drawn in a common direction in each drawing. Among these, the Y-axis direction coincides with the vertical direction, and the X-axis direction coincides with the horizontal direction. In addition, unless otherwise noted, the vertical direction is used as a reference for upper and lower descriptions.

The television receiver TV includes a liquid crystal display unit LDU, various substrates PWB, MB, CTB attached to the back side (back side) of the liquid crystal display unit LDU, and main substrates PWB, MB, A cover member CV attached to cover the CTB and a stand ST are provided, and the display surface of the liquid crystal display unit LDU is held by the stand ST along the vertical direction (Y-axis direction). The liquid crystal display device 10 according to the present embodiment is obtained by removing at least a configuration for receiving a television signal (such as a tuner portion of the main board MB) from the television receiver TV having the above-described configuration. As shown in FIG. 2, the liquid crystal display unit LDU has a horizontally long rectangular shape (rectangular shape, longitudinal shape) as a whole, and includes a liquid crystal panel 16 that is a display panel and a backlight device 24 that is an external light source. These are configured to be integrally held by the frame 14 and the chassis 22 which are appearance members constituting the appearance of the liquid crystal display device 10. In addition, the chassis 22 according to the present embodiment constitutes a part of the appearance member and a part of the backlight device 24.

First, the configuration of the back side of the liquid crystal display device 10 will be described. As shown in FIG. 2, a pair of stand attachment members STA extending along the Y-axis direction are attached to two positions spaced apart in the X-axis direction on the back surface of the chassis 14 constituting the back side appearance of the liquid crystal display device 10. It has been. These stand attachment members STA have a substantially channel shape in which the cross-sectional shape is open on the surface on the chassis 14 side, and a pair of support columns STb in the stand ST are inserted into a space held between the stand 14 and the chassis 14. It has become. 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 part STa that is parallel to the X-axis direction and the Z-axis direction, and a pair of column parts STb that rise from the pedestal part STa along the Y-axis direction. The cover member CV is made of synthetic resin, and is attached so as to cover about half of the lower side shown in 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, there is a component storage space that can store components such as various substrates PWB, MB, and CTB described below.

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 can be said to be a power supply source of the liquid crystal display device 10 and can supply driving power to the other substrates MB and CTB, the LEDs 17 included in the backlight device 12, and the like. Therefore, it can be said that the power supply substrate PWB also serves as the “LED drive substrate for driving the LED 17”. The main board MB has at least a tuner unit capable of receiving a television signal and an image processing unit (not shown) for processing the received television signal, and controls the processed image signal as follows. Output to the substrate CTB is possible. The main board MB receives an image signal from the image reproduction device when the liquid crystal display device 10 is connected to an external image reproduction device (not shown). It can be processed and output to the control board CTB. The control board CTB has a function of converting an image signal input from the main board into a liquid crystal driving signal and supplying the converted liquid crystal driving signal to the liquid crystal panel 16.

As shown in FIG. 3, the liquid crystal display unit LDU that constitutes the liquid crystal display device 10 has its main components between a frame 13 that forms the front side appearance and a chassis 14 that forms the back side appearance. It is assumed that it is housed in a space. The main components housed in the frame 13 and the chassis 14 include at least the liquid crystal panel 11, the optical member 15, the light guide plate 16, and the LED unit 20. Among these, the liquid crystal panel 11, the optical member 15, and the light guide plate 16 are held in a state of being sandwiched between the front frame 13 and the back chassis 14 in a state where they are stacked on each other. The backlight device 12 includes an optical member 15, a light guide plate 16, an LED unit LU, and a chassis 14, and is configured by removing the liquid crystal panel 11 and the frame 13 from the liquid crystal display unit LDU. A pair of LED units LU forming the backlight device 12 are arranged in the frame 13 and the chassis 14 so as to sandwich the light guide plate 16 from both sides in the short side direction (Y-axis direction). The LED unit LU includes an LED 17 that is a light source, an LED substrate 18 on which the LED 17 is mounted, and a heat dissipation member (heat spreader, light source attachment member) 19 to which the LED substrate 18 is attached. Hereinafter, each component will be described.

As shown in FIG. 3, the liquid crystal panel 11 has a horizontally long rectangular shape (rectangular shape, longitudinal shape) in a plan view, and a pair of

glass substrates

11a and 11b having excellent translucency are provided with a predetermined gap. The liquid crystal is sealed between the two

substrates

11a and 11b. One substrate (array substrate) 11b is provided with a switching element (for example, 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. The other substrate (CF substrate) 11a has a color filter, a counter electrode, an alignment film, and the like in which colored portions such as R (red), G (green), and B (blue) are arranged in a predetermined arrangement. Is provided. The liquid crystal panel 11 is placed on the front side of the optical member 15 to be described below, and the back side surface (the outer surface of the polarizing plate on the back side) is in close contact with the optical member 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 11c of the liquid crystal panel 11 includes a display area on the center side of the screen where images can be displayed, and a non-display area having a frame shape (frame shape) surrounding the display area on the outer peripheral edge side of the screen. Become. The liquid crystal panel 11 is connected to a control board CTB via a driver component for driving liquid crystal and a flexible board 26, 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 come to be. A polarizing plate (not shown) is disposed outside each of the

substrates

11a and 11b.

As shown in FIG. 3, the optical member 15 has a horizontally long rectangular shape when viewed from the same plane as the liquid crystal panel 11, and the size (short side dimension and long side dimension) is the same as that of the liquid crystal panel 11. Is done. 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 described above. Each of the optical members 15 is formed in a sheet shape and three are stacked on each other. Specifically, the diffusion sheet 15a, the lens sheet (prism sheet) 15b, and the reflective polarizing sheet 15c are sequentially formed from the back side (light guide plate 16 side). Note that the three

sheets

15a, 15b, and 15c have substantially the same size in a plan view.

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 viewed in a plan view, as in the liquid crystal panel 11 and the optical member 15, and has a plate shape that is thicker than the optical member 15. The long side direction on the surface coincides with the X-axis direction, the short side direction coincides with the Y-axis direction, and the plate thickness direction orthogonal to the main surface coincides with the Z-axis direction. The light guide plate 16 is laminated on the back side of the optical member 15 and is disposed so as to be sandwiched between the optical member 15 and the chassis 14. As shown in FIG. 4, the light guide plate 16 has at least a short side dimension larger than each short side dimension of the liquid crystal panel 11 and the optical member 15, and both end portions in the short side direction (long side direction). Are arranged so as to protrude outward from both end portions of the liquid crystal panel 11 and the optical member 15 (so as to be non-overlapping in a plan view). The light guide plate 16 is disposed in a form sandwiched in the Y-axis direction by a pair of LED units 20 disposed on both sides in the short side direction, and the light from the LED 22 is received at both ends in the short side direction. It has been introduced. The light guide plate 16 has a function of raising and emitting the light from the LED 22 introduced from both ends in the short side direction so as to be directed toward the optical member 15 side (front side) while propagating inside.

Of the main surface of the light guide plate 16, the surface facing the front side (the surface facing the optical member 15) 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 of the light guide plate 16, both end surfaces on the long side that are long along the X-axis direction (both end surfaces on both ends in the short side direction) are LED 22 ( The LED substrate 18) and the LED substrate 18) are opposed to each other with a predetermined space therebetween, and form a pair of light incident surfaces 16b on which light emitted from the LEDs 22 is incident. The light incident surface 16b is a surface parallel to the X-axis direction and the Z-axis direction (the main plate surface of the LED substrate 18), and is a surface substantially orthogonal to the light emitting surface 16a. Further, the alignment direction of the LED 22 and the light incident surface 16b coincides with the Y-axis direction and is parallel to the light emitting surface 16a.

The back side of the light guide plate 16, that is, the surface opposite to the light emitting surface 16a (the surface facing the chassis 14) 16c reflects light emitted from the surface 16c to the outside outside as shown in FIG. A reflection sheet 26 that can be raised to the front side is provided so as to cover almost the entire area. In other words, the reflection sheet 26 is disposed in a form sandwiched between the chassis 14 and the light guide plate 16. The reflection sheet 26 is made of a synthetic resin and has a white surface with excellent light reflectivity. The reflection sheet 26 has a short side dimension larger than the short side dimension of the light guide plate 16, and both ends thereof are arranged to protrude closer to the LED 22 than the light incident surface 16 b of the light guide plate 16. Light that travels obliquely from the LED 22 toward the chassis 14 can be efficiently reflected by the projecting portion of the reflection sheet 26 and directed toward the light incident surface 16 b of the light guide plate 16. It should be noted that at least one of the light exit surface 16a and the opposite surface 16c of the light guide plate 16 has a reflection part (not shown) for reflecting internal light or a scattering part (not shown) for scattering internal light. Are patterned so as to have a predetermined in-plane distribution, whereby the light emitted from the light exit surface 16a is controlled to have a uniform distribution in the surface.

Next, the configuration of the LED 17, the LED substrate 18, and the heat radiating member 19 constituting the LED unit LU will be sequentially described. As shown in FIGS. 3 and 4, the LED 17 constituting the LED unit LU 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 one main emission wavelength, and specifically, one that emits blue light in a single color is used. On the other hand, the resin material that seals the LED chip is dispersed and blended with a phosphor that emits a predetermined color when excited by the blue light emitted from the LED chip, and generally emits white light as a whole. It is said. In addition, as the phosphor, for example, a yellow phosphor that emits yellow light, a green phosphor that emits green light, and a red phosphor that emits red light are used in appropriate combination, or any one of them is used. It can be used alone. The LED 17 is a so-called top surface light emitting type in which the surface opposite to the mounting surface with respect to the LED substrate 18 (the surface facing the light incident surface 16b of the light guide plate 16) is the main light emitting surface 17a.

The heat radiating member 19 constituting the LED unit LU is made of a metal having excellent thermal conductivity such as aluminum, for example, and as shown in FIGS. 3 and 4, an LED mounting portion (light source mounting portion) to which the LED substrate 18 is mounted. 19a and a heat dissipating part 19b in surface contact with the plate surface of the chassis 14, and these are bent in a substantially L-shaped cross section. The length of the heat dissipation member 19 is approximately the same as the length of the LED substrate 18 described above. The LED mounting portion 19a constituting the heat radiating member 19 has a plate shape parallel to the plate surface of the LED substrate 18 and the light incident surface 16b of the light guide plate 16, and the long side direction is the X-axis direction and the short side direction. Are coincident with the Z-axis direction and the thickness direction is coincident with the Y-axis direction. The LED board 18 is attached to the inner plate surface of the LED mounting portion 19a, that is, the plate surface facing the light guide plate 16 side. The LED mounting portion 19 a has a long side dimension substantially equal to the long side dimension of the LED substrate 18, but the short side dimension is larger than the short side dimension of the LED substrate 18. In addition, both end portions in the short side direction of the LED mounting portion 19a protrude outward from the both end portions of the LED substrate 18 along the Z-axis direction. The outer plate surface of the LED mounting portion 19a, that is, the plate surface opposite to the plate surface to which the LED substrate 18 is mounted, is opposed to a protruding portion 21 of the frame 13 described later. That is, the LED mounting portion 19 a is arranged in a form that is interposed between the protruding portion 21 of the frame 13 and the light guide plate 16. The LED mounting portion 19a extends in the Z-axis direction (the overlapping direction of the liquid crystal panel 11, the optical member 15, and the light guide plate 16) from the inner end of the heat radiating portion 19b described below, that is, the end on the LED 17 (light guide plate 16) side. Along the front side, that is, the frame 13 side.

As shown in FIGS. 3 and 4, the heat radiating portion 19 b has a plate shape parallel to the plate surface of the chassis 14, and the long side direction is the X-axis direction and the short side direction is the Y-axis direction. The vertical direction coincides with the Z-axis direction. The heat dissipating part 19b protrudes from the end on the back side of the LED mounting part 19a, that is, from the end on the chassis 14 side to the outside along the Y-axis direction, that is, toward the side opposite to the light guide plate 16 side. . The long side dimension of the heat dissipating part 19b is substantially the same as that of the LED mounting part 19a. Of the heat radiating portion 19 b, the entire plate surface on the back side, that is, the plate surface facing the chassis 14 side, is in surface contact with the plate surface of the chassis 14. In addition, the front plate surface of the heat radiating portion 19b, that is, the plate surface on the opposite side to the contact surface with respect to the chassis 14 is opposed to the protruding portion 21 of the frame 13 to be described later, and the protruding end surface of the protruding portion 21 Is in contact with. That is, the heat dissipating part 19b is arranged in such a manner as to be sandwiched (intervened) between the protruding part 21 of the frame 13 and the chassis 14. As a result, the heat generated by the LED 17 when it is turned on is transmitted to the frame 13 having the chassis 14 and the protruding portion 21 via the LED substrate 18, the LED mounting portion 19a, and the heat radiating portion 19b. It is efficiently dissipated to the outside of the device 10 and it is difficult to stay inside. The heat radiating portion 19b is held in an attached state by the screw member SM with respect to the protruding portion 21, and has an insertion hole 19b1 through which the screw member SM passes.

Subsequently, the configuration of the frame 13 and the chassis 14 that form the appearance member and the holding member HM will be described. Both the frame 13 and the chassis 14 are made of metal such as aluminum, for example, and mechanical strength (rigidity) and thermal conductivity are both higher than when the frame 13 and the chassis 14 are made of synthetic resin. As shown in FIG. 3, the frame 13 and the chassis 14 are stacked on each other while accommodating the LED units LU paired at both ends (both ends on both long sides) in the short side direction. The liquid crystal panel 11, the optical member 15, and the light guide plate 16 are accommodated so as to be sandwiched from the front side and the back side.

As shown in FIG. 3, the frame 13 has a horizontally long frame shape as a whole so as to surround the display area on the display surface 11 c of the liquid crystal panel 11. The frame 13 includes a panel pressing portion 13a that is parallel to the display surface 11c of the liquid crystal panel 11 and presses the liquid crystal panel 11 from the front side, and a side wall portion 13b that protrudes from the outer peripheral side portion of the panel pressing portion 13a toward the back side. The cross-sectional shape is substantially L-shaped. Among these, the panel pressing portion 13a forms a horizontally long frame shape following the outer peripheral side portion (non-display area, frame portion) of the liquid crystal panel 11, and presses the outer peripheral side portion of the liquid crystal panel 11 from the front side over almost the entire circumference. Is possible. In addition to the outer peripheral portion of the liquid crystal panel 11, the panel pressing portion 13 a includes the optical member 15 and the outer peripheral portion of the light guide plate 16 disposed on the outer side in the radial direction than the outer peripheral portion of the liquid crystal panel 11, and each LED unit. The LU also has a width that can be covered from the front side. The outer surface of the panel pressing portion 13a facing the front side (the surface opposite to the surface facing the liquid crystal panel 11) is exposed to the outside on the front side of the liquid crystal display device 10 like the display surface 11c of the liquid crystal panel 11. The front surface of the liquid crystal display device 10 is configured together with the display surface 11 c of the panel 11. On the other hand, the side wall part 13b has comprised the substantially square cylinder shape which protrudes toward the back side from the outer peripheral side part (specifically outer peripheral edge part) in the panel pressing part 13a. The side wall portion 13b surrounds the liquid crystal panel 11, the optical member 15, the light guide plate 16, and each LED unit LU accommodated in the entire circumference, and can also surround the back side chassis 14 over almost the entire circumference. . The side wall portion 13 b has an outer surface along the circumferential direction of the liquid crystal display device 10 exposed to the outside in the circumferential direction of the liquid crystal display device 10, and constitutes a top surface, a bottom surface, and both side surfaces of the liquid crystal display device 10.

As shown in FIG. 8, the frame-shaped frame 13 having the basic configuration described above is formed by assembling four divided frames 13S divided for each side (each long side portion and each short side portion). Is done. Specifically, the divided frame 13S includes a pair of long side divided frames 13SL constituting the long side portions of the frame 13 (panel pressing portion 13a and side wall portion 13b) and a pair of short sides constituting the short side portions. The side-side divided frame 13SS is used. The long side divided frame 13SL is made of a prismatic material having a substantially L-shaped cross section extending along the X axis direction, whereas the short side divided frame 13SS is substantially cross sectional extending along the Y axis direction. Made of L-shaped prismatic material. As a result, when manufacturing each divided frame 13S, it is possible to employ a manufacturing method such as extrusion molding of a metal material. For example, the frame-like frame 13 is temporarily manufactured by a manufacturing method such as cutting out of the metal material. Compared with the case of manufacturing, the manufacturing cost can be reduced. Adjacent long-side divided frames 13SL and short-side divided frames 13SS constitute a frame-like frame 13 by connecting ends in their extending directions. As shown in FIG. 8, each end portion, which is a connecting portion of the long side divided frame 13SL and the short side divided frame 13SS (the joint of the frame 13), is both in the X-axis direction and the Y-axis direction when viewed in plan. In detail, it is shaped to follow a straight line connecting the inner end position and the outer end position at each corner of the panel pressing portion 13a. The long side divided frame 13SL covers each LED unit LU in addition to the liquid crystal panel 11, the optical member 15, and the light guide plate 16 (see FIG. 4), and thus the short side divided that does not cover the LED unit LU. Compared to the frame 13SS (see FIG. 5), it is formed relatively wide.

As shown in FIGS. 4 to 7, a screw member SM is attached to the panel pressing portion 13a of the frame 13 at a position closer to the inner side (closer to the light guide plate 16) than the side wall portion 13b. The protruding portion 21 is integrally formed. The protruding portion 21 protrudes from the inner surface of the panel pressing portion 13a toward the back side along the Z-axis direction, and extends horizontally along each side (X-axis direction or Y-axis direction) of the panel pressing portion 13a. It is almost block-shaped. As shown in FIGS. 4 and 5, the protruding portion 21 is formed with a groove portion 21 a that opens toward the back side and can tighten the screw member SM. As shown in FIG. 4, a predetermined interval is provided between the pair of protrusions 21 on the long side and the LED attachment portion 19 a. As shown in FIG. 4, between the pair of heat radiating members 19, the heat radiating member 19 in a positional relationship overlapping with the flexible substrate 26 in a plan view, and the protruding portion 21 to which the heat radiating member 19 is attached. In addition, a board accommodation space BS that can accommodate the printed circuit board 27 is provided. A plurality of flexible boards 26 are intermittently arranged along the long side direction of the printed board 27, and the other end portions are connected to the printed board 27, respectively. The printed circuit board 27 has a connector portion (not shown) connected to one end side of the FPC (not shown), and an FPC insertion hole (not shown) formed in the chassis 14 at the other end side of the FPC. ) Through the outside of the chassis 14 and connected to the control board CTB.

As shown in FIGS. 4 and 5, a contact rib 23 that supports the light guide plate 16 from the front side (display surface 11 c side) is integrally formed at a position inward of the projection 21 in the panel pressing portion 13 a. Has been. The abutment rib 23 protrudes from the inner surface of the panel pressing portion 13a toward the back side (light guide plate 16 side) along the Z-axis direction (the protruding direction of the protruding portion 21), and on each side of the panel pressing portion 13a. It is in the form of an elongated, substantially block that extends along. The abutting ribs 23 are provided on the respective sides of the panel pressing portion 13a and each has a length dimension over the entire length of each side. As shown in FIG. 9, the abutment rib 23 is divided and provided in each divided frame 13 </ b> S constituting the frame 13, as in the above-described protruding portion 21, and when each divided frame 13 </ b> S is assembled, As a whole, a frame shape is provided over the entire circumference of the panel pressing portion 13a (light guide plate 16). As shown in FIGS. 4 and 5, the contact rib 23 overlaps with the end side portion 16EP of the light guide plate 16 protruding outward from the liquid crystal panel 11 in a plan view (viewed from the display surface 11c side). The protruding front end surface is in contact with the front side surface of the end portion 16EP of the light guide plate 16, that is, the light emitting surface 16a. Therefore, the contact rib 23 can be supported from the front side (display surface 11c side) in a state where the light guide plate 16 is sandwiched between the contact rib 23 and the chassis 14 described later, and has a light guide plate support function. The light guide plate 16 is pressed from the front side by the contact rib 23 whose end side portion 16EP forms a frame shape over the entire circumference.

A pair of long side contact ribs 23 provided on the long side divided frame 13SL and extending along the long side of the panel pressing portion 13a are provided between the liquid crystal panel 11 and the LED 17, as shown in FIG. It is arranged in an intervening form. Specifically, the pair of long-side contact ribs 23 closes the spaces between the LED 17 and the end faces of the liquid crystal panel 11 and the optical member 15 on the LED 17 side, so that the light from the LED 17 is It also has a light shielding function to prevent direct incidence on the end surfaces of the liquid crystal panel 11 and the optical member 15 without passing through the light guide plate 16, and also functions as a “light shielding part”. Of the pair of long side abutment ribs 23, the abutment ribs 23, which are in a positional relationship overlapping with the flexible substrate 26 in plan view, are provided with a flexible substrate 26 as shown in FIGS. A plurality of flexible substrate insertion groove portions 23a for insertion are formed in a notched manner in such a manner that a plurality of the flexible substrate insertion groove portions 23a are intermittently arranged in parallel along the X-axis direction, and the arrangement thereof matches the arrangement of each flexible substrate 26.

As shown in FIGS. 4 and 5, a pressing protrusion 24 that protrudes to the back side, that is, the liquid crystal panel 11 side, is integrally formed on the inner edge portion of the panel pressing portion 13 a. The pressing protrusion 24 has a cushioning material 24a attached to its protruding tip surface, and the liquid crystal panel 11 can be pressed from the front side via the cushioning material 24a. As shown in FIG. 9, the pressing protrusion 24 and the cushioning material 24 a are extended along each side in each divided frame 13 </ b> S constituting the frame 13, as in the above-described protrusion 21. Each side is divided and provided, and when each divided frame 13S is assembled, as a whole, it forms a frame shape arranged over the entire circumference at the inner peripheral edge of the panel pressing portion 13a.

As shown in FIG. 3, the chassis 14 has a generally horizontally shallow shallow plate shape as a whole so as to cover the light guide plate 16, the LED unit LU, and the like over almost the entire region from the back side. The outer surface of the chassis 14 facing the back side (the surface opposite to the surface facing the light guide plate 16 and the LED unit LU) is exposed outside the back side of the liquid crystal display device 10 and constitutes the back surface of the liquid crystal display device 10. is doing. The chassis 14 has a horizontally long bottom plate portion 14a similar to the light guide plate 16, and a pair of LEDs that protrude from the ends of both long sides of the bottom plate portion 14a to the back side and accommodate the LED unit LU. And an accommodating portion 14b.

As shown in FIGS. 3 and 4, the bottom plate portion 14 a can receive from the back side most of the light guide plate 16 on the center side in the short side direction (portions excluding both end portions in the short side direction). It can be said that the receiving part with respect to the light-guide plate 16 is comprised. As shown in FIG. 5, both end portions of the bottom plate portion 14 a in the long side direction extend outward from both end portions in the long side direction of the light guide plate 16, and the frame 13 and the chassis 14. Is a pair of screw mounting portions 14a1 to be mounted from the outside.

As shown in FIGS. 3 and 4, the LED accommodating portion 14b is arranged in such a manner that the bottom plate portion 14a is sandwiched from both sides in the short side direction, and is retracted to the back side by one step from the bottom plate portion 14a. Can be accommodated. The LED housing portion 14b includes a screw mounting portion 14b1 that is parallel to the bottom plate portion 14a and to which the screw member SM is mounted from the outside, and a pair of side plate portions 14b2 that rise from the both ends of the screw mounting portion 14b1 toward the front side. Of the pair of side plate portions 14b2, the inner side plate portion 14b2 is connected to the bottom plate portion 14a. The screw mounting portion 14b1 in the LED housing portion 14b is arranged in a state in which the heat radiating portion 19b of the heat radiating member 19 constituting the LED unit LU is in surface contact with the inner surface thereof. In addition, the outer side plate portion 14b2 in the LED housing portion 14b is inserted into a gap provided between the long-side protruding portion 21 and the side wall portion 13b, so that the chassis 14 is in the Y-axis with respect to the frame 13. It has a function of positioning in the direction.

As described above, as shown in FIG. 3, the pair of screw mounting portions 14 b 1 constituting the LED housing portion 14 b are provided on both long sides of the outer peripheral side portion of the chassis 14 according to the present embodiment. A pair of screw mounting portions 14a1 constituting the bottom plate portion 14a are respectively formed on the side portions. A plurality of screw insertion holes 25 through which the screw members SM pass are respectively formed in the pair of screw mounting portions 14a1 included in the bottom plate portion 14a and the pair of screw mounting portions 14b1 included in the LED housing portion 14b. The screw mounting portions 14a1 and 14b1 are arranged so as to overlap with the projecting portion 21 of the frame 13 in plan view, and the screw insertion holes 25 formed in the screw mounting portions 14a1 and 14b1 are projecting portions 21. Is communicated with the groove 21a. Therefore, the screw member SM passes through the screw insertion hole 25 along the Z-axis direction (the overlapping direction of the liquid crystal panel 11, the optical member 15, and the light guide plate 16) from the back side of the chassis 14 (the side opposite to the display surface 11c side). In addition, the screw mounting portions 14a1 and 14b1 are sandwiched between the groove portions 21a of the protruding portions 21 with the screw mounting portions 14a1 and 14b1 interposed therebetween. When the screw member SM is tightened, a screw groove is formed in the groove portion 21a by a thread formed on the shaft portion of the screw member SM. The screw insertion holes 25 formed in the pair of screw mounting portions 14b1 of the LED housing portion 14b have screw fastening holes for fastening that are large enough to pass only the shaft portion of the screw member SM, as shown in FIG. As shown in FIG. 7, there are a heat-dissipating member screw insertion hole 25B large enough to pass the head in addition to the shaft portion of the screw member SM, and the screw member SM passed through the former is the heat dissipating portion 19b. The screw member SM passed through the latter functions to attach only the heat dissipating part 19b to the protruding part 21 while the housing bottom plate part 14b1 is fastened together and attached to the protruding part 21.

Then, the structure of the notch 16s and the positioning member 30 which are the principal parts of this embodiment is demonstrated. In the liquid crystal display device 10 according to the present embodiment, as shown in FIGS. 3 and 5, at both end portions in the short side direction of the light guide plate 16, the end surfaces of the light guide plate 16 are at the end surfaces and in the center portion in the short side direction. Notches 16 s that penetrate the plate surface of the light guide plate 16 along the thickness direction (Z-axis direction) and open in a concave shape toward the outside of the light guide plate 16 are provided. In addition, a reflection sheet side cutout penetrating in the thickness direction (Z-axis direction) is also provided at a portion of the reflection sheet 20 that overlaps each cutout 16s in a plan view.

On the other hand, as shown in FIGS. 5 and 6, a positioning member 30 having a rectangular shape in cross section is attached to the inner surface (surface facing the end surface of the light guide plate 16) 21 a of the protruding portion 21 of the frame 13. ing. The positioning member 30 is in the form of a block having a rectangular shape in cross-section, and more specifically in the shape of a substantially rectangular tube that is open toward the front side and the back side of the liquid crystal display device 10, and between the notches 16s. Is accommodated in the notch 16s with a slight gap. For this reason, the positioning member 30 is fitted to the light guide plate 16 in a state of being accommodated in the notch 16s. As the positioning member 30 is fitted to the light guide plate 16 in this way, the light guide plate 16 is positioned in the plate surface direction (XY plane direction) between the frame 13 and the chassis 14.

The configuration of the positioning member 30 will be described in detail. The positioning member 30 having a substantially rectangular tube shape and a substantially box shape is made of metal and is hollow. Here, among the surfaces of the positioning member 30, the surface directed to the light guide plate 16 side (inner side) is referred to as a first surface 30a, and the surface directed to the frame 13 side (outer side) is referred to as a second surface 30b. I will do it. The positioning member 30 is accommodated in the notch 16s in a state where each surface (the first surface 30a and both side surfaces) facing the side surface of the notch 16s is parallel to the side surface of the notch 16s (see FIG. 8). The positioning member 30 is fixed to the frame 13 by screwing the second surface 30 b to the inner surface 21 a of the protruding portion 21 of the frame 13. Specifically, the positioning member 30 is screwed with the direction (X-axis direction in this embodiment) orthogonal to the thickness direction (Z-axis direction) of the light guide plate 16 (see FIG. 10).

As shown in FIG. 10, the first surface 30a of the positioning member 30 is provided with a circular screwing opening 30s. In the manufacturing process of the liquid crystal display device 10, after the positioning member 30 is attached to the protruding portion 21 of the frame 13, the light guide plate 16 is positioned and accommodated in the frame 13. In the present embodiment, the positioning member 30 is provided with such a screwing opening 30s, so that when the positioning member 30 is screwed to the protruding portion 21 in the manufacturing process of the liquid crystal display device 10, Since the screw 31 can be inserted through the opening 30 for screwing, it is easy to screw.

As shown in FIG. 9, the portion opening toward the back side of the positioning member 30 (upper side in the Z-axis direction in FIG. 9) extends in a plate shape in a direction inclined with respect to the plate surface of the light guide plate 16, and A pair of

inclined portions

30c, 30c arranged in an opposing manner is provided. By providing such a pair of

inclined portions

30c, 30c, the light leaking from the notch 16s of the light guide plate 16 and entering the positioning member 30 is reflected by the inclined portion 30c, thereby positioning member. The reflection is repeated within 30 (see FIG. 9). For this reason, it can prevent thru | or suppress that the said light which goes to the liquid crystal panel 11 side by the inclination part 30c.

As described above, in the liquid crystal display device 10, in the manufacturing process, the positioning member 30 is perpendicular to the thickness direction (Z-axis direction) of the light guide plate 16 with respect to the protruding portion 23 of the frame 13 (in this embodiment). The light guide plate 16 is positioned so that the positioning member 30 and the notch 16 s of the light guide plate 16 are fitted, and the light guide plate 16 is accommodated in the frame 13. Is done. For this reason, even if the positioning member 30 rotates after the light guide plate 16 is accommodated due to poor screwing or the like, the positioning member 30 rotates around the screw axis, so the positioning member 30 is notched 16s in the light guide plate 16. Even if the light guide plate 16 abuts on the side surface of the light guide plate 16, the light guide plate 16 is not rotated in the plate surface direction (XY plane direction) by being pushed by the positioning member 30. As a result, misalignment of the light guide plate 16 in the manufacturing process is prevented.

As described above, in the liquid crystal display device 10 according to the present embodiment, since the positioning member 30 is accommodated in the notch 16s and fitted, the chassis 14 and the light guide plate 16 are fitted. A configuration in which 16 is positioned can be realized. Since the rotation axis direction of the screw 31 for fastening the positioning member 30 is orthogonal to the thickness direction (Z-axis direction) of the light guide plate 16, after positioning the light guide plate 16 in the manufacturing process of the liquid crystal display device 10. When the positioning member 30 is screwed, even if the positioning member 30 rotates around its rotation axis and comes into contact with the notch portion of the light guide plate 16, the positioning member 30 does not move in the thickness direction of the light guide plate 16 (Z-axis). Therefore, the light guide plate 16 can be prevented from rotating in the rotation direction about the thickness direction (Z-axis direction). Therefore, while realizing a configuration in which the light guide plate 16 is positioned in the liquid crystal display device 10 including the edge light type backlight device 12, in the manufacturing process, the light guide plate 16 is in the plate surface direction (XY plane direction). ) Can be prevented from being displaced along.

Also. Since the frame 13 is manufactured by combining the four divided frames 13S formed by extrusion as described above, the positioning member 30 is formed with the direction along the thickness direction (Z-axis direction) of the light guide plate 16 as the rotation axis direction. In the case of screwing, it is necessary to form a recess for accommodating a part of the positioning member 30 and screwing in a part of the divided frame 13S by cutting or the like. On the other hand, in the liquid crystal display device 10 according to the present embodiment, the positioning member 30 is screwed with the direction along the direction orthogonal to the thickness direction (Z-axis direction) of the light guide plate 16 as the rotation axis direction. The positioning member 30 can be screwed directly to the side surface without providing a recess or the like in a part of 13S by cutting or the like. For this reason, the manufacturing process of the liquid crystal display device 10 can be simplified.

In the liquid crystal display device 10 according to the present embodiment, the positioning member 30 extends in a plate shape in a direction inclined with respect to the plate surface of the light guide plate 16, and a pair of

inclined portions

30c and 30c arranged in an opposing manner. have. Thereby, the light leaking into the positioning member 30 from the end face of the light guide plate 16 is reflected by the pair of

inclined portions

30c and 30c and reflected in the positioning member 30, so that the light exits from the positioning member 30. You can prevent or suppress going. For this reason, it is possible to prevent or suppress the light leaking into the positioning member 30 from the end surface of the light guide plate 16 toward the liquid crystal panel 11 side by the inclined portion 30c.

Further, in the liquid crystal display device 10 according to the present embodiment, the positioning member has a block shape. For this reason, the positioning member 30 can be easily accommodated in the notch 16 s having a rectangular shape in cross section, and the light guide plate 16 can be suitably positioned by the positioning member 30.

Further, in the liquid crystal display device 10 according to the present embodiment, the protruding portion has a columnar shape. For this reason, one surface of the positioning member 30 having a block shape can be easily attached to the protruding portion 21.

Further, in the liquid crystal display device 10 according to the present embodiment, the frame 13 has a contact rib 23 that protrudes in a columnar shape toward the light guide plate 16 side and whose front end surface contacts the light emitting surface 16 a of the light guide plate 16. Yes. For this reason, it is possible to realize a configuration in which the light guide plate 16 is supported by pressing the light guide plate 16 from the front side with the contact ribs 23.

In recent years, it has been studied to abolish the synthetic resin cabinet, which is an external part of the liquid crystal display unit, in order to reduce the manufacturing cost and further reduce the thickness. However, in this embodiment, the frame 13 and the chassis 14 are considered. The liquid crystal display device 10 without the cabinet in which the light guide plate 16 is positioned and the light guide plate 16 is prevented from being displaced in the manufacturing process is realized.

<Embodiment 2>
A second embodiment will be described with reference to the drawings. The second embodiment is different from the first embodiment in that the positioning member 130 is further provided with a plate-like portion 130d. Since the other configuration is the same as that of the first embodiment, the description of the structure, operation, and effect is omitted. In FIG. 12, the part obtained by adding the numeral 100 to the reference numeral in FIG. 8 is the same as the part described in the first embodiment.

In the liquid crystal display device according to the second embodiment, as shown in FIG. 11, a pair of plate-like shapes extending in a plate shape on both sides of a portion that opens toward the front side of the positioning member 30 (lower side in the Z-axis direction in FIG. 11).

Parts

130d and 130d are provided. When the positioning member 130 is screwed to the protruding portion 121 of the frame 113, the plate-like portion 130 d extends so that its plate surface is parallel to the plate surface of the light guide plate 116, and between the light guide plate 116 and the chassis 114. Located between. Specifically, the plate-like portion 130d is in contact with the light emitting surface of the light guide plate 116 (see FIG. 12). By providing such a plate-like portion 130d, the positioning member 130 is forced in the rotational direction (the rotational direction of the screw 131) with the direction orthogonal to the thickness direction (Z-axis direction) of the light guide plate 116 as the rotational axis. Even when the plate member 130d is added, since the plate-like portion 130d is in contact with the light guide plate 130, the positioning member 130 can be prevented from rotating in the rotation direction. Furthermore, light that leaks from the chassis side and travels toward the liquid crystal panel in the vicinity of the notch 116s of the light guide plate 116 can be blocked by the plate-like portion 130d.

<Embodiment 3>
Embodiment 3 will be described with reference to the drawings. The third embodiment is different from the first embodiment in that the positioning member 230 is further provided with a contact portion 230e. Since the other configuration is the same as that of the first embodiment, the description of the structure, operation, and effect is omitted. In FIG. 13, the part obtained by adding the numeral 100 to the reference numeral in FIG. 11 is the same as the part described in the first embodiment.

In the liquid crystal display device 510 according to the third embodiment, as shown in FIG. 13, both sides of the pair of inclined portions 230d and 230d are portions opened toward the back side of the positioning member 230 (upper side in the Z-axis direction in FIG. 13). In addition, a pair of

contact portions

230e and 230e extending in a plate shape toward the back side (upward in the Z-axis direction) are provided. The contact portion 230e extends from the positioning member 230 so that its plate surface is flush with the side surface of the positioning member 230. On the other hand, as shown in FIG. 14, the projecting portion 221 of the frame 213 is provided with an extending portion 229 that extends to the back side of the positioning member 230 (upward in the Z-axis direction in FIG. 14). A concave groove portion 229s that opens toward the positioning member 230 side is provided in the portion 229. The pair of inclined portions 230d and 230d and the pair of

contact portions

230e and 230e of the positioning member 230 are accommodated in the groove portion 229s. The pair of abutting

portions

230e and 230e are in the state of being accommodated in the groove portion 229s, and the outer plate surfaces thereof are in contact with the side surfaces of the groove portion 229s. When the contact portion 230e and the groove portion 229s are provided, a force is applied to the positioning member 230 in the rotation direction with the direction orthogonal to the thickness direction (Z-axis direction) of the light guide plate 216 as the rotation axis. However, since the contact portion 230e is in contact with the side surface of the groove portion 229s, the positioning member 230 can be prevented from rotating in the rotation direction.

The modifications of the above embodiments are listed below.
(1) In each of the above embodiments, the notch is provided on the short side of the light guide plate and the positioning member is attached to the short side of the light guide plate. However, the notch is the long side of the light guide plate. The positioning member may be provided on the long side of the light guide plate. In this case, the positioning member may be configured to be screwed with the Y-axis direction in each drawing as the rotation axis direction.

(2) In the above embodiments, the configuration in which the positioning member has a substantially box-shaped block shape is illustrated, but the shape of the positioning member is not limited.

(3) In each of the above embodiments, the configuration in which the positioning member is hollow is illustrated, but the configuration of the positioning member is not limited.

(4) In each of the above embodiments, a liquid crystal display device of a type that is desired to have a cabinet has been illustrated, but the present invention can also be applied to a liquid crystal display device that includes a cabinet.

(5) In addition to the above embodiments, the configuration, shape, and the like of the positioning member can be changed as appropriate.

(6) In addition to the above embodiments, the shape and arrangement of the cutouts provided in the light guide plate can be changed as appropriate.

(7) In each of the above embodiments, a liquid crystal display device using a liquid crystal panel as the display panel has been illustrated. However, the present invention can also be applied to display devices using other types of display panels.

As mentioned above, although each embodiment of this invention was described in detail, these are only illustrations and do not limit a claim. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.

Further, the technical elements described in this specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology exemplified in this specification or the drawings can achieve a plurality of objects at the same time, and has technical usefulness by achieving one of the objects.

TV ... TV receiver, LDU ... liquid crystal display unit, PWB ... power supply board, MB ... main board, CTB ... control board, CV ... cover member, ST ... stand, LU ... LED unit, 10 ... liquid crystal display device, 11 ... liquid crystal Panel, 12 ... Backlight device, 13, 113, 213 ... Frame, 14 ... Chassis, 15 ... Optical member, 16, 216, 316 ... Light guide plate, 16s, 216s, 316s ... Notch, 20, 320, 520 ... Reflection Sheet, 21, 121, 221... Projection, 23... Contact rib, 30, 130, 230... Positioning member, 30c, 130c, 230c .. Inclination, 130d. …Screw

Claims

A light source;
A display panel that performs display using light of the light source;
The display panel is arranged so as to overlap with the side opposite to the display surface side, the end surface is arranged to face the light source, and the light guides the light from the light source to the display panel side. A light guide plate having a notch at its end surface;
A chassis disposed on the opposite side of the display panel with respect to the light guide plate;
A frame that is disposed on the display surface side of the display panel and accommodates the display panel, the light source, and the light guide plate between the chassis and a protrusion that protrudes toward the chassis. Frame,
A positioning member that is accommodated in the notch and is positioned with the notch to position the light guide plate between the frame and the chassis, and the thickness of the light guide plate with respect to the protrusion A positioning member screwed with a direction orthogonal to the direction as the rotation axis direction;
A display device comprising:
The display device according to claim 1, wherein the positioning member has a pair of inclined portions that extend in a plate shape in a direction inclined with respect to a plate surface of the light guide plate and are arranged to face each other.
The display device according to claim 1, wherein the positioning member includes a plate-like portion extending in a plate shape in a direction along a plate surface of the light guide plate.
The display device according to claim 3, wherein the plate-like portion is positioned between the light guide plate and the chassis.
The protrusion is provided with a concave groove that opens toward the positioning member.
A part of the positioning member is arranged to be fitted into the groove, and has a contact portion that extends in a plate shape from the fitted portion along the thickness direction of the light guide plate and contacts the groove. The display device according to claim 1, wherein the display device is a display device.
The display device according to any one of claims 1 to 5, wherein the positioning member has a block shape.
The display device according to claim 6, wherein the protruding portion has a columnar shape.
The display device according to any one of claims 1 to 7, wherein the positioning member is hollow.
The display device according to any one of claims 1 to 8, wherein the positioning member is made of metal.
The said frame has a contact rib which protrudes in the column shape at the said light-guide plate side, and the front end surface contact | abuts the plate | board surface orient | assigned to the said display panel side of the said light-guide plate. Item 10. The display device according to any one of items 9 to 9.
The display device according to any one of claims 1 to 10, wherein the display panel is a liquid crystal panel using liquid crystal.
A television receiver comprising the display device according to any one of claims 1 to 11.