JP2013191295A - Display device and television set - Google Patents

Display device and television set Download PDF

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Publication number
JP2013191295A
JP2013191295A JP2012054747A JP2012054747A JP2013191295A JP 2013191295 A JP2013191295 A JP 2013191295A JP 2012054747 A JP2012054747 A JP 2012054747A JP 2012054747 A JP2012054747 A JP 2012054747A JP 2013191295 A JP2013191295 A JP 2013191295A
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Japan
Prior art keywords
guide plate
light guide
display
screw
fixing
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JP2012054747A
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Japanese (ja)
Inventor
Takashi Ogino
貴志 荻野
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Sharp Corp
シャープ株式会社
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Priority to JP2012054747A priority Critical patent/JP2013191295A/en
Publication of JP2013191295A publication Critical patent/JP2013191295A/en
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Abstract

[PROBLEMS] To narrow a picture frame.
A liquid crystal display device includes an LED, a liquid crystal panel, a light guide plate having an end face opposed to the LED, and an end side portion arranged outside the end of the liquid crystal panel. A frame 13 and a chassis 14 that hold the liquid crystal panel 11 and the light guide plate 16 from the display surface 11c side and the opposite side, and a holding member HM that accommodates the LED 17 therebetween, The second screw mounting portion 22 is provided, and the chassis 14 is attached to the second screw mounting portion 22 along the direction in which the liquid crystal panel 11 and the light guide plate 16 overlap with each other and between the second screw mounting portion 22. The second screw member SM2 to be sandwiched and fixed, and provided in the outer portion of the light guide plate 16, and the second screw mounting portion 22 is inserted, whereby the light guide plate 16 is in a direction along the plate surface. Comprises a positioning hole shaped portions 29 for positioning with the.
[Selection] Figure 5

Description

  The present invention relates to a display device and a television receiver.
  For example, a liquid crystal display device such as a liquid crystal television requires a backlight device as an illumination device separately because the liquid crystal panel as the display panel does not emit light, and an example thereof is described in Patent Document 1 below. Backlight devices in this type of liquid crystal display device are roughly classified into direct type and edge light type depending on the mechanism. In order to realize further thinning of the liquid crystal display device, an edge light type backlight is used. It is preferred to use an apparatus. In addition, what was described in following patent document 1 as an example of the above liquid crystal display devices is known, In this thing, a concave part is provided in a light-guide plate, a convex part is provided in a chassis, respectively, and a convex part is provided in a convex part. In contrast, the light guide plate is positioned by fitting the concave portion. .
JP 2004-296193 A
  Incidentally, a general liquid crystal display device has a structure in which a liquid crystal panel is sandwiched between a front panel holding member and a back panel receiving member. Here, when there is a request for reduction in manufacturing cost or further reduction in thickness, for example, it is conceivable to eliminate the panel receiving member on the back side. However, if the panel receiving member is simply abolished, the light guide plate, the optical member, and the liquid crystal panel are directly stacked, so that the holding force required for the panel pressing member and the chassis that hold them in a stacked state is high. Become. In order to secure such a high holding force, the installation space for the fixing structure for fixing the panel pressing member and the chassis is required more than a certain amount, and since this fixing structure is disposed on the outer peripheral side portion of the liquid crystal display device, There was a problem that the part was wide.
  The present invention has been completed based on the above circumstances, and an object thereof is to narrow the frame.
  The display device of the present invention is disposed so as to overlap a light source, a display panel that performs display using light of the light source, and a side opposite to the display surface side of the display panel, and an end surface of the display device A light guide plate disposed opposite to the light source and having an end portion disposed outside the end of the display panel, and sandwiching the display panel and the light guide plate from the display surface side and the opposite side A holding member configured to hold the light source between the pair of holding portions, and a fixing member mounting portion provided on one of the pair of holding portions. And at least the other holding portion of the pair of holding portions between the fixing member attaching portion and the fixing member attaching portion along the overlapping direction of the display panel and the light guide plate. By sandwiching A fixing member for fixing the pair of holding portions in an assembled state, and the outer portion of the light guide plate, and either the fixing member attaching portion or the fixing member is inserted, whereby the light guide plate is A positioning hole-like portion for positioning in a direction along the plate surface.
  In this way, the light emitted from the light source is incident on the end face of the light guide plate, propagates through the light guide plate, and then is guided to the display panel. Therefore, an image is displayed on the display panel using the light. The The fixing member mounting portion provided in one holding portion of the pair of holding portions is attached with the fixing member in a state where at least the other holding portion is sandwiched, thereby sandwiching the display panel and the light guide plate that overlap each other. A pair of holding parts to be held are fixed in the assembled state. Since this fixing member is attached along the direction in which the display panel and the light guide plate overlap, a sufficiently high holding force can be applied along the overlapping direction from the pair of holding portions to the display panel and the light guide plate. . Thereby, even if it is the structure which does not have the panel receiving member interposed between a light guide plate and a display panel like the past, it can hold a display panel and a light guide plate stably with sufficient holding power. it can.
  Furthermore, the light guide plate is positioned in the direction along the plate surface by either one of the fixing member attaching portion and the fixing member inserted into the positioning hole-like portion provided in the end side portion. That is, since either one of the fixing member mounting portion and the fixing member, which is a structure for fixing the pair of holding portions, also serves as a structure for positioning the light guide plate, the pair of holding portions are temporarily fixed. Separately from the structure for positioning the light guide plate, the structure can reduce the installation space and narrow the frame portion in the display device as compared with the case where the structure is arranged outside the end side portion of the light guide plate. can do.
The following configuration is preferable as an embodiment of the present invention.
(1) The one holding part is arranged on the display surface side with respect to the display panel, and the other holding part is arranged on the side opposite to the display surface side with respect to the light guide plate, The fixing member is attached to the fixing member attachment portion from the side opposite to the display surface side. In this way, the display panel, the light guide plate, and the other holding part arranged on the opposite side of the display surface side are assembled in this order to the one holding part arranged on the display surface side, and then the fixing member. Is attached to the fixing member attachment portion from the side opposite to the display surface side, and therefore, the assembly workability and productivity are excellent.
(2) The pair of holding portions are appearance members that constitute the appearance of the display device. If it does in this way, it will become difficult to visually recognize a fixing member from the display surface side on the external appearance, and, thereby, the external appearance in the said display apparatus can be made favorable.
(3) The one holding portion includes a panel pressing portion that presses the display panel from the display surface side, and a side wall portion that protrudes from the outer portion of the panel pressing portion toward the side opposite to the display surface side. And the fixing member attaching portion is provided in a form continuous to the side wall portion. If it does in this way, the mechanical strength of a fixing member attaching part and a side wall part can be raised. Thereby, since the positional accuracy of the fixing member attaching portion is increased, the positional accuracy of the light guide plate positioned by the fixing member attaching portion or the fixing member attached thereto is also increased.
(4) An optical member disposed between the display panel and the light guide plate and having an end portion disposed outside the end portion of the display panel is provided, and the end side of the optical member is provided. The portion communicates with the positioning hole-shaped portion of the light guide plate and inserts either the fixing member mounting portion or the fixing member, thereby positioning the optical member in the direction along the plate surface. A second positioning hole is provided. In this way, the optical member has the second positioning hole portion provided at the end portion thereof communicating with the positioning hole portion of the light guide plate, and the fixing member is attached to both positioning hole portions. When either one of the part and the fixing member is inserted, it is positioned in the direction along the plate surface together with the light guide plate.
(5) The light guide plate has a light source facing end surface arranged to face the light source and a light source non-facing end surface not facing the light source, and the end portion of the light guide plate The positioning hole-shaped part is provided while having a light source non-opposing end face. In this way, the light from the light source is incident on the light source facing end surface of the light guide plate and propagates through the light guide plate. However, the positioning hole is provided on the end portion having the light source non-facing end surface. Therefore, it is difficult for light propagated in the light guide plate to leak out from the positioning hole partway.
(6) A panel connecting member connected to an end portion of the display panel and arranged to protrude outward from the end portion is provided, and the fixing member and the fixing member attaching portion are connected to the panel connecting member. Arranged along the end of the display panel. In this case, the fixing member and the fixing member mounting portion are arranged along the end portion of the display panel with respect to the panel connecting member arranged in a form protruding outward from the end portion of the display panel. As compared with the case where the fixing member and the fixing member attaching portion are arranged outside the panel connecting member, the frame can be further narrowed.
(7) The fixing member, the fixing member attaching portion, and the panel connection member are arranged alternately in a plurality along the end portion of the display panel. In this way, compared to the case where a plurality of sets of fixing members and fixing member mounting portions are arranged side by side, the fixing points by the fixing members and fixing member mounting portions in the pair of holding portions are dispersed. The display panel and the light guide plate can be held more stably.
(8) The light guide plate is positioned by inserting the fixing member mounting portion into the positioning hole portion. In this way, when the light guide plate is assembled to the one holding portion, the fixing member mounting portion provided in the one holding portion is inserted into the positioning hole-like portion of the light guide plate, so that the light guide plate Is positioned. That is, since the light guide plate can be positioned before the other holding portion is assembled, work such as position correction when the light guide plate is misaligned can be easily performed, and the workability is excellent. .
(9) The light guide plate is positioned by inserting the fixing member into the positioning hole portion. In this way, when the fixing member is attached to the fixing member attaching portion with the display panel and the light guide plate sandwiched between the pair of holding portions, the fixing member is inserted into the positioning hole-like portion of the light guide plate, The light guide plate can be positioned.
(10) The fixing member mounting portion supports the end portion of the light guide plate from the side opposite to the fixing member. In this way, when the light guide plate is assembled to the one holding portion, the end portion of the light guide plate is supported from the side opposite to the fixing member by the fixing member mounting portion provided in the one holding portion. be able to. As a result, deformation such as bending is less likely to occur in the light guide plate, so that the positioning accuracy of the positioning hole-like portion provided in the end side portion is increased, and the positioning is more accurately performed by the fixing member inserted therein. Can do.
(11) The positioning hole-shaped portion penetrates the light guide plate in the plate thickness direction, and an inner peripheral surface of the positioning hole-shaped portion is opposed to any one of the fixing member mounting portion and the fixing member over the entire circumference. Yes. In this way, when either one of the fixing member mounting portion and the fixing member is inserted into the positioning hole-shaped portion, the inner peripheral surface of the positioning hole-shaped portion is formed between the fixing member mounting portion and the fixing member over the entire circumference. Since it will be opposed to either one, the light guide plate can be positioned in all directions in the direction along the plate surface.
(12) The positioning hole-shaped portion penetrates the light guide plate in the plate thickness direction and opens outward along the plate surface of the light guide plate. In this way, for example, by sliding the light guide plate in the direction along the plate surface, it is possible to easily insert the light guide plate into one of the fixing member mounting portion and the fixing member with respect to the positioning hole-shaped portion. . Thereby, diversification of assembling work can be achieved.
(13) The display panel is a liquid crystal panel in which liquid crystal is sealed between a pair of substrates. Such a display device can be applied as a liquid crystal display device to various uses such as a display of a television or a personal computer, and is particularly suitable for a large screen.
  According to the present invention, a narrow frame can be achieved.
1 is an exploded perspective view showing a schematic configuration of a television receiver and a liquid crystal display device according to Embodiment 1 of the present invention. Rear view of television receiver and liquid crystal display Exploded perspective view showing a schematic configuration of a liquid crystal display unit constituting a liquid crystal display device Sectional drawing which shows the cross-sectional structure along the short side direction of a liquid crystal display device Sectional drawing which shows the cross-sectional structure along the long side direction of a liquid crystal display device The expanded sectional view which shows the section composition along the short side direction of a liquid crystal display, and cut the flexible substrate (screw fastening hole for co-fastening) The expanded sectional view which shows the cross-sectional structure along the short side direction of a liquid crystal display device, and cut | disconnected the light-guide plate support part (screw penetration hole for heat radiating members) Rear view of frame Rear view showing a state in which the LED unit and the light guide plate are assembled to the frame Enlarged rear view of the short side part of the frame assembled with LED unit and light guide plate Xi-xi sectional view of FIG. Xii-xii sectional view of FIG. Sectional drawing which shows the cross-sectional structure along the short side direction of a liquid crystal display device, and shows the work procedure which assembles each component of the liquid crystal display unit which makes a liquid crystal display device Sectional drawing which shows the cross-sectional structure along the long side direction of a liquid crystal display device, Comprising: The work procedure which assembles each component of the liquid crystal display unit which makes a liquid crystal display device The enlarged back view of the short side part of the frame concerning Embodiment 2 of the present invention Xvi-xvi sectional view of FIG. Sectional drawing of the 1st screw attachment part which concerns on Embodiment 3 of this invention, a 1st screw member, a positioning hole-shaped part, and a 2nd positioning hole-shaped part. The expanded rear view of the short side part in the flame | frame which assembled | attached the LED unit which concerns on Embodiment 4 of this invention, a light-guide plate, etc. Xix-xix cross-sectional view of FIG. The expanded rear view of the short side part in the flame | frame which assembled | attached the LED unit which concerns on Embodiment 5 of this invention, a light-guide plate, etc. The expanded rear view of the short side part in the flame | frame which assembled | attached the LED unit which concerns on Embodiment 6 of this invention, a light-guide plate, etc. The expanded rear view of the short side part in the flame | frame which assembled | attached the LED unit which concerns on Embodiment 7 of this invention, a light-guide plate, etc.
<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, the liquid crystal display device 10 is illustrated. In addition, a part of each drawing shows an X axis, a Y axis, and a Z axis, and each axis direction is drawn to be a direction shown in each drawing. Moreover, let the upper side shown in FIG.4 and FIG.5 be a front side, and let the lower side of the figure be a back side.
  As shown in FIG. 1, the television receiver TV according to the present embodiment includes a liquid crystal display unit (display unit) LDU, and various substrates PWB, MB, and CTB attached to the back side (back side) of the liquid crystal display unit LDU. The liquid crystal display unit LDU includes a cover member CV attached to the back surface side of the liquid crystal display unit LDU so as to cover the various substrates PWB, MB, and CTB, and a stand ST. Axial direction) is supported. 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. 3, 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 11 as a display panel and a backlight device (illumination device) as an external light source. ) 12, which are appearance members constituting the appearance of the liquid crystal display device 10, which are opposite to the frame (the holding portion disposed on the display surface 11 c side, one holding portion) 13 and the chassis (the display surface 11 c side). The holding portion disposed on the side and the other holding portion) 14 are integrally held. It can be said that the frame 13 and the chassis 14 constitute a holding member HM. The chassis 14 according to the present embodiment constitutes a part of the appearance member and the holding member HM and a part of the backlight device 12.
  First, the configuration of the back side of the liquid crystal display device 10 will be described. As shown in FIG. 2, the stand mounting member STA extending along the Y-axis direction is provided at 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. A pair is attached. 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. Note that a wiring member (such as an electric wire) connected to the LED substrate 18 included in the backlight device 12 can be passed 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 covers a part of the back surface of the chassis 14, specifically about the lower half of FIG. 2 while traversing the pair of stand mounting members STA in the X-axis direction. It is attached in the form. 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 (light source drive substrate) for driving the LED 17”. The main board MB includes at least a tuner unit capable of receiving a television signal and an image processing unit (not shown) for processing the received television signal. The processed image signal is described below. Output to the control board 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 MB into a liquid crystal driving signal and supplying the converted liquid crystal driving signal to the liquid crystal panel 11.
  As shown in FIG. 3, the liquid crystal display unit LDU that constitutes the liquid crystal display device 10 has a main component that includes a frame (front frame) 13 that forms a front side appearance and a chassis (rear side) that forms a back side appearance. It is assumed that it is accommodated in a space held between the chassis 14 and the chassis 14. 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 (light source unit) LU. 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. The LED unit LU that constitutes the backlight device 12 has a pair of light guide plates 16 that are paired 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). Two sets are arranged side by side in the side direction (X-axis direction), and a total of four are installed. The LED unit LU includes an LED 17 that is a light source, an LED substrate (light source substrate) 18 on which the LED 17 is mounted, and a heat radiating member (heat spreader, light source mounting 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. The front side (front side) of the pair of substrates 11a and 11b is the CF substrate 11a, and the back side (back side) is the array substrate 11b. Among these, the array substrate 11b is provided with a switching element (for example, TFT) connected to the source wiring and the gate wiring orthogonal to each other, a pixel electrode connected to the switching element, an alignment film, and the like. . Specifically, a large number of TFTs and pixel electrodes are arranged side by side on the array substrate 11b, and a large number of TFTs and pixel electrodes are arranged around the TFTs and pixel electrodes so as to surround a gate wiring and a source wiring in a lattice shape. It is installed. The gate wiring and the source wiring are connected to the gate electrode and the source electrode of the TFT, respectively, and the pixel electrode is connected to the drain electrode of the TFT. The array substrate 11b is provided with capacitor wirings (auxiliary capacitor wirings, storage capacitor wirings, Cs wirings) that are parallel to the gate wirings and overlap the pixel electrodes in plan view. Are arranged alternately in the Y-axis direction. On the other hand, the CF substrate 11a is provided with a color filter in which colored portions such as R (red), G (green), and B (blue) are arranged in a predetermined arrangement, a counter electrode, and an alignment film. . A polarizing plate (not shown) is disposed outside each of the substrates 11a and 11b.
  Of the pair of substrates 11a and 11b constituting the liquid crystal panel 11, the array substrate 11b is formed to have a larger size in plan view than the CF substrate 11a, as shown in FIGS. The portions are arranged so as to protrude outward from the CF substrate 11a. Specifically, the array substrate 11b is formed to be slightly larger than the CF substrate 11a so that its outer peripheral end protrudes outside the outer peripheral end of the CF substrate 11a over the entire periphery. Of the pair of long side end portions constituting the outer peripheral end portion of the array substrate 11b, the long side end portion on the control substrate CTB side (the front side shown in FIG. 3 and the left side shown in FIG. 4) in the Y-axis direction A plurality of source side terminal portions led from the above-described source wiring are provided, and a source side flexible substrate (panel connection member, source driver) 26 is provided in each source side terminal portion as shown in FIG. It is connected. A plurality of source-side flexible substrates 26 are intermittently arranged in the X-axis direction, that is, the direction along the long-side end of the array substrate 11b, and from the long-side end of the array substrate 11b to the Y-axis direction. Projecting outward along. On the other hand, one of the pair of short side end portions constituting the outer peripheral end portion of the array substrate 11b (the back side shown in FIG. 3 and the left side shown in FIG. 5) has the gate wiring described above. In addition, a plurality of gate side terminal portions led from the capacitor wiring are provided, and a gate side flexible substrate (panel connection member, gate driver) 28 is connected to each gate side terminal portion. A plurality of gate-side flexible substrates 28 are intermittently arranged in the Y-axis direction, that is, the direction along the short-side end of the array substrate 11b, and from the short-side end of the array substrate 11b in the X-axis direction. Projecting outward along.
  As shown in FIG. 3, each flexible substrate 26 and 28 is mounted on a film-like base material made of a synthetic resin material (for example, polyimide resin) having insulating properties and flexibility, and the base material. And a driver DR having a plurality of wiring patterns (not shown) on the base material and the wiring patterns being mounted near the center of the base material. It is connected to the. The source-side flexible substrate 26 has an anisotropic conductive film (ACF) with one end thereof being connected to the source-side terminal portion of the array substrate 11b and the other end being connected to a terminal portion of a printed circuit board 27 described later. ). The printed circuit board 27 is connected to the control board CTB via a wiring member (not shown), and receives signals (scan signals to the gate wiring, data signals to the source wiring, and capacitance wiring) input from the control board CTB. , Etc.) can be transmitted to the source side flexible substrate 26. On the other hand, one end of the gate side flexible substrate 28 is crimped to the gate side terminal portion of the array substrate 11b via an anisotropic conductive film. The array substrate 11b is formed with a relay wiring (not shown) connecting the source side terminal portion and the gate side terminal portion, and the gate side terminal portion and the gate side flexible substrate 28 are connected via the relay wiring. A signal (scanning signal to the gate wiring, capacitance signal to the capacitor wiring, etc.) is transmitted from the source side flexible substrate 26 and the source side terminal portion. Thereby, the liquid crystal panel 11 displays an image on the display surface 11c based on a signal input from the control board CTB.
  As shown in FIGS. 4 and 5, the liquid crystal panel 11 is placed on the front side (light emitting side) of the optical member 15 described below, and the back side surface (the outer surface of the back side polarizing plate). ) 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 an image 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 terminal portions and the flexible substrates 26 and 28 described above are arranged in the non-display area.
  As shown in FIG. 3, the optical member 15 has a horizontally long rectangular shape in a plan view, like the liquid crystal panel 11, and its size (short side dimension and long side dimension) is slightly larger than the liquid crystal panel 11. It is said that it is small. The optical member 15 is placed on the front side (light emitting side, liquid crystal panel 11 side) of the light guide plate 16 to be described below, and is sandwiched between the liquid crystal panel 11 and the light guide plate 16 described above. It is arranged. Each of the optical members 15 is formed in a sheet shape and three layers are laminated. Specifically, the optical member 15 includes a diffusion sheet 15a, a lens sheet (prism sheet) 15b, and a reflective polarizing sheet 15c in order 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.
  Among these, the diffusion sheet 15a arranged on the backmost side (the side opposite to the light emitting side, the light guide plate 16 side) is made of a synthetic resin that is almost transparent (excellent in light transmission) and is in a sheet-like base material. It has a structure in which a large number of diffusion particles are dispersed and has a function of diffusing transmitted light. The lens sheet 15b disposed in the center in the stacking direction (Z-axis direction) is made of a substantially transparent synthetic resin sheet-like base material and a prism layer formed by stacking on the plate surface of the base material. Therefore, it is possible to give a condensing effect to the transmitted light. The reflective polarizing sheet 15c arranged on the most front side (light emitting side, liquid crystal panel 11 side) has, for example, a multilayer structure in which layers having different refractive indexes are alternately stacked, and the light from the light guide plate 16 is reflected. Of these, the p-wave is transmitted and the s-wave is reflected toward the light guide plate 16 side. The s wave returned to the light guide plate 16 side is reflected to the front side by a light guide reflection sheet 20 and the like which will be described later, so that it is separated into s wave and p wave, and then emitted light toward the reflective polarizing sheet 15c again. Therefore, it is excellent in light use efficiency (luminance).
  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 that of air and substantially transparent (excellent translucency). As shown in FIG. 3, the light guide plate 16 has a laterally long rectangular shape as viewed in a plane, 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 plate surface coincides with the Z-axis direction. As shown in FIGS. 4 and 5, the light guide plate 16 has a size (short side dimension and long side dimension) viewed in a plane larger than that of the liquid crystal panel 11 and the optical member 15, and The end portion 16EP is arranged so as to protrude outward from the end portion of the liquid crystal panel 11. Specifically, the light guide plate 16 is formed to be slightly larger than the liquid crystal panel 11 so that the end side portion 16EP protrudes outward from the outer peripheral end portion of the array substrate 11b of the liquid crystal panel 11 over the entire circumference. 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. The light guide plate 16 is arranged in such a manner that it is sandwiched in the Y-axis direction by a pair of LED units LU arranged separately on both sides in the short side direction. Each light is introduced. The light guide plate 16 has a function of rising and emitting the light from the LED 17 introduced from both ends in the short side direction so as to be directed toward the optical member 15 (front side) while propagating inside. By the way, the reason why the light guide plate 16 is made larger than the liquid crystal panel 11 and the optical member 15 as described above (the reason for securing the end side portion 16EP) is that the distance for propagating light incident from the LED 17 is sufficient. The end side portion 16EP of the light guide plate 16 is more likely to cause unevenness in the outgoing light than the central side portion, and the end side portion 16EP is more likely to cause unevenness in the outgoing light. This is also because the display quality is not good when the light emitted from is used for image display.
  Of the light guide plate 16, the surface facing the front side (the surface facing the optical member 15) emits light from the inside toward the optical member 15 and the liquid crystal panel 11 as shown in FIG. 4. 16a. Of the outer peripheral end surfaces adjacent to the plate surface of the light guide plate 16, both long-side end surfaces (both end surfaces possessed by both end portions in the short side direction) having a long shape along the X-axis direction are respectively LED17 ( The LED board 18) and the LED board 18) are opposed to each other with a predetermined space therebetween, and these form a pair of light incident surfaces 16b on which light emitted from the LEDs 17 is incident. The light incident surface 16b is a surface parallel to the X-axis direction and the Z-axis direction (the 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 17 and the light incident surface 16b coincides with the Y-axis direction and is parallel to the light emitting surface 16a. Since the light incident surface 16b is opposed to the LED 17, it can be said that it constitutes an "LED facing end surface (light source facing end surface)". On the other hand, among the outer peripheral end surfaces adjacent to the plate surface of the light guide plate 16, both end surfaces on the short side that are long along the Y-axis direction are LED non-facing end surfaces that do not face the LED 17, respectively. Light source non-opposing end face) 16d. Of the end-side portion 16EP of the light guide plate 16, the portion having the LED non-facing end face 16d, that is, the short-side end-side portion 16EP includes those having a positional relationship overlapping with the gate-side flexible substrate 28 when viewed from the front side. It is.
  On the back side of the light guide plate 16, that is, the plate surface opposite to the light emitting surface 16a (the surface facing the chassis 14) 16c, the light is emitted from the plate surface 16c to the outside outside as shown in FIGS. A light guide reflection sheet (reflecting member) 20 that can reflect light and rise to the front side is provided so as to cover almost the entire region. In other words, the light guide reflection sheet 20 is disposed so as to be sandwiched between the chassis 14 and the light guide plate 16. The light guide reflection sheet 20 is made of a synthetic resin and has a white surface with excellent light reflectivity. As shown in FIG. 4, at least the short side dimension of the light guide reflection sheet 20 is larger than the short side dimension of the light guide plate 16, and both ends thereof are closer to the LED 17 than the light incident surface 16 b of the light guide plate 16. It is arranged to stick out. Light that travels obliquely from the LED 17 toward the chassis 14 side is efficiently reflected by the projecting portions (both ends on the long side) of the light guide reflection sheet 20 and directed toward the light incident surface 16 b of the light guide plate 16. It is possible to make it. Note that at least one of the light exit surface 16a of the light guide plate 16 and the plate surface 16c on the opposite side thereof is a reflecting portion (not shown) that reflects internal light or a scattering portion that scatters internal light (see FIG. (Not shown) is patterned so as to have a predetermined in-plane distribution, and thereby, the light emitted from the light emitting surface 16a is controlled to have a uniform distribution in the surface.
  Next, the configurations 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.
  As shown in FIGS. 3 and 4, the LED substrate 18 constituting the LED unit LU is an elongated plate shape extending along the long side direction of the light guide plate 16 (X-axis direction, longitudinal direction of the light incident surface 16 b). The plate surface is accommodated in the frame 13 and the chassis 14 in a posture parallel to the X-axis direction and the Z-axis direction, that is, a posture parallel to the light incident surface 16 b of the light guide plate 16. The LED substrate 18 has a length dimension that is approximately half of the long side dimension of the light guide plate 16. The LED 17 having the above-described configuration is surface-mounted on the inner side of the LED substrate 18, that is, the plate surface facing the light guide plate 16 side (the surface facing the light guide plate 16), and this is the mounting surface 18 a. It is said. A plurality of LEDs 17 are arranged in a line (linearly) in parallel on the mounting surface 18a of the LED substrate 18 along the length direction (X-axis direction) with a predetermined interval. That is, it can be said that a plurality of LEDs 17 are intermittently arranged in parallel along the long side direction at both ends on the long side of the backlight device 12. The interval between the LEDs 17 adjacent to each other in the X-axis direction, that is, the arrangement pitch of the LEDs 17 is substantially equal. Note that the arrangement direction of the LEDs 17 coincides with the length direction (X-axis direction) of the LED substrate 18. On the mounting surface 18a of the LED substrate 18, a wiring pattern (not shown) made of a metal film (such as a copper foil) that extends along the X-axis direction and connects the adjacent LEDs 17 across the LED 17 group in series. The terminal portions formed at both ends of the wiring pattern are connected to the power supply substrate PWB via wiring members such as connectors and electric wires, so that driving power is supplied to each LED 17. It has become. The LED substrates 18 that are paired with the light guide plate 16 in between are housed in the frame 13 and the chassis 14 with the mounting surfaces 18a of the LEDs 17 facing each other, and are thus mounted on the paired LED substrates 18 respectively. The main light emitting surfaces 17a of the LEDs 17 are opposed to each other, and the optical axes of the LEDs 17 substantially coincide with the Y-axis direction. Moreover, the base material of the LED board 18 is made of metal such as aluminum, for example, and the wiring pattern (not shown) described above is formed on the surface thereof via an insulating layer. In addition, as a material used for the base material of LED board 18, insulating materials, such as a ceramic, can also be used.
  As shown in FIGS. 3 and 4, the heat radiating member 19 constituting the LED unit LU is made of a metal having excellent thermal conductivity such as aluminum. The heat dissipating member 19 includes an LED attachment portion (light source attachment portion) 19a to which the LED substrate 18 is attached, and a heat dissipating portion 19b in surface contact with the plate surface of the chassis 14, and these have a bent shape having a substantially L-shaped cross section. There is no. 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 on which the LED substrate 18 is mounted is opposed to a first screw mounting portion 21 included in the frame 13 described later. That is, the LED attachment portion 19 a is arranged in a form that is interposed between the first screw attachment 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 opposite to the contact surface with respect to the chassis 14, is opposed to a first screw mounting portion 21 included in the frame 13 to be described later and the first screw. It is in contact with the protruding end surface of the mounting portion 21. That is, the heat dissipating part 19b is arranged in such a manner as to be sandwiched (intervened) between the first screw mounting part 21 of the frame 13 and the chassis 14. As a result, the heat generated from the LED 17 along with the lighting is transmitted to the frame 13 having the chassis 14 and the first screw mounting portion 21 via the LED substrate 18, the LED mounting portion 19a, and the heat radiating portion 19b. The liquid crystal display device 10 is efficiently dissipated to the outside, and it is difficult to stay inside. The heat dissipating portion 19b is held in an attached state by the first screw member (fixing member) SM1 with respect to the first screw attaching portion 21, and is inserted through the first screw member SM1. It has a hole 19b1.
  Then, the structure of the flame | frame 13 and the chassis 14 which make an external appearance member and the holding member HM is demonstrated. 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. That is, it can be said that both the materials constituting the frame 13 and the chassis 14 are light shielding materials having light shielding properties. 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 held so as to be sandwiched between 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 a 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 side portion of the liquid crystal panel 11, the panel pressing portion 13a includes an end side portion 16EP of the light guide plate 16 disposed on the outer side in the radial direction than the outer peripheral side portion of the liquid crystal panel 11, and each LED unit LU. It 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 prism 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. It consists of an L-shaped prism. As a result, when manufacturing each divided frame 13S, for example, a manufacturing method of extruding a metal material can be adopted. Therefore, the frame-like frame 13 is temporarily manufactured by a manufacturing method such as cutting 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 viewed in a plan view in both the X axis direction and the Y axis direction. 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. 6), and thus the short side divided that does not cover the LED unit LU. Compared to the frame 13SS (see FIG. 10), it is formed relatively wide.
  As shown in FIGS. 4 and 5, a screw member (fixing member) SM <b> 1 for fixing the frame 13 and the chassis 14 is positioned inwardly of the side wall portion 13 b (near the light guide plate 16) in the panel pressing portion 13 a. , SM2 to which SM2 is attached (fixing member attachment portions) 21 and 22 are integrally formed. The screw attachment portions 21 and 22 are provided with first screw attachment portions (first fixing member attachment portions, light sources) provided on the long side portions of the panel pressing portion 13a that overlap the LED unit LU (LED 17) in plan view. Side fixing member mounting portion) 21 and the second screw mounting portion (second fixing member mounting portion; second fixing member mounting portion; Non-light source side fixing member mounting portion) 22. Among these, the second screw mounting portion 22 on the short side (non-arrangement side of the LED unit LU (light source)) will be described later, and here, the long side (arrangement of the LED unit LU (light source) is first described here. The first screw mounting portion 21 will be described.
  As shown in FIG. 4, the first screw attachment portion 21 is provided in a pair with a pair of long side portions in the panel pressing portion 13 a. Specifically, the first screw mounting portion 21 protrudes from the inner surface of each long side portion of the panel pressing portion 13a toward the back side along the Z-axis direction, and each long side (X axis) of the panel pressing portion 13a. It is in the shape of a horizontally long, substantially block extending along the direction. The 1st screw attachment part 21 has the length dimension covering the full length of each long side in panel pressing part 13a. As shown in FIG. 8, the first screw attachment portion 21 is provided on each of the pair of long side divided frames 13 </ b> SL constituting the frame 13. As shown in FIG. 4, each first screw mounting portion 21 is formed with a screw tightening groove portion (fixing member tightening groove portion) 21a that opens toward the back side and can fasten the first screw member SM1. ing. The screw tightening groove 21a is formed over substantially the entire length along the length direction of the first screw mounting portion 21, and the width dimension thereof is set to be slightly smaller than the shaft portion of the first screw member SM1. Yes. The first screw mounting portion 21 is disposed in the Z-axis direction so as to be interposed between the panel pressing portion 13a of the frame 13 and the chassis 14.
  As shown in FIG. 4, each first screw mounting portion 21 is interposed between each side wall portion 13b of the frame 13 and the LED mounting portion 19a of each heat radiating member 19 forming the LED unit LU in the Y-axis direction. There is a predetermined interval between the LED mounting portion 19a. Of the pair of heat radiating members 19, between the heat radiating member 19 and the first screw mounting portion 21 to which the heat radiating member 19 is attached, the source-side flexible board 26 and the heat radiating member 19 in a positional relationship overlapping in plan view. As shown in FIGS. 6 and 7, the board accommodation space BS that can accommodate the printed board 27 is formed. That is, the printed circuit board 27 is interposed between the first screw mounting portion 21 and the LED mounting portion 19a. The printed circuit board 27 is made of synthetic resin and has a horizontally long plate shape extending along the length direction (X-axis direction) of the first screw mounting portion 21 and the LED mounting portion 19a. A posture in which the surface is parallel to the plate surface outside the LED mounting portion 19a (opposite side of the LED substrate 18), in other words, the long side direction is the X axis direction, the short side direction is the Z axis direction, and the thickness direction Are accommodated in the above-described substrate accommodation space BS in a posture that matches the Y-axis direction. A plurality of source-side flexible boards 26 are intermittently arranged along the long side direction of the printed circuit board 27 and connected to the other end (the side opposite to the liquid crystal panel 11 side). ing. The source-side flexible board 26 connected to the printed board 27 and the array board 11b of the liquid crystal panel 11 crosses the LED mounting portion 19a, the LED board 18 and the LED 17 along the Y-axis direction. Further, the printed circuit board 27 has a connector portion (not shown for both FPCs) to which one end side of the FPC is inserted and connected, and the other end side of the FPC is an FPC insertion hole (see FIG. (Not shown) and pulled out to the outside of the back side of the chassis 14 and connected to the control board CTB.
  As shown in FIG. 4, a guide for supporting the light guide plate 16 from the front side (display surface 11c side) is provided at a position closer to the inner side than the first screw mounting portion 21 in each of the long side portions of the panel pressing portion 13a. The optical plate support portions 23 are integrally formed in pairs. The light guide plate support portion 23 protrudes from the inner surface of each long side portion of the panel pressing portion 13a toward the back side (light guide plate 16) along the Z-axis direction (projection direction of the first screw mounting portion 21). Each of the panel pressing portions 13a has an elongated and substantially block shape extending along each long side (X-axis direction). The light guide plate support portion 23 has a length dimension extending over the entire length of each long side of the panel pressing portion 13a. As illustrated in FIG. 8, the light guide plate support portion 23 is provided in a pair with the pair of long side divided frames 13 </ b> SL constituting the frame 13, similarly to the first screw attachment portion 21 described above. As shown in FIG. 4, the light guide plate support portion 23 is seen in plan view from the long side end portion 16EP of the light guide plate 16 that protrudes outward from the liquid crystal panel 11 (viewed from the display surface 11 c side). The protruding front end surface is in contact with the front side surface of the long side end portion 16EP of the light guide plate 16, that is, the light emitting surface 16a. Therefore, the light guide plate support part 23 can be supported from the front side (light emission side) with the light guide plate 16 sandwiched between the light guide plate 16 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 respective light guide plate support portions 23 over the entire length of both end portions 16EP on the long side. Since both end portions 16EP on the long side of the light guide plate 16 with which the light guide plate support portion 23 abuts are ends having a light incident surface 16b (LED facing end surface) with respect to the LED 17, the light guide plate support portion 23 By supporting the light guide plate 16, the positional relationship between the LED 17 and the light incident surface 16b in the Z-axis direction can be stably maintained.
  As shown in FIG. 4, each light guide plate support portion 23 is arranged so as to be interposed between the liquid crystal panel 11 and the LED 17. Specifically, each light guide plate support portion 23 closes the space between the LED 17 and each end surface on the LED 17 side in the liquid crystal panel 11 and the optical member 15, so that the light from the LED 17 causes the light guide plate 16 to be blocked. The liquid crystal panel 11 and the optical member 15 do not pass through, but have a light shielding function to prevent direct incidence on the end faces, and also function as a “light shielding part”. Of the light guide plate support portions 23, the light source plate support portion 23 that is in a positional relationship overlapping with the source side flexible substrate 26 in a plan view includes the source side flexible substrate 26 as shown in FIGS. 6 and 7. Source-side flexible board insertion groove 23a for inserting the source-side flexible board 26 is notched so as to be intermittently arranged in parallel along the X-axis direction, and the arrangement thereof matches the arrangement of each source-side flexible board 26. Is done.
  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. 8, the pressing protrusions 24 and the cushioning material 24 a are provided so as to be divided for each side while being extended along each side in each divided frame 13 </ b> S constituting the frame 13. When each of the divided frames 13S is assembled, the entire frame is formed at the inner peripheral edge of the panel pressing portion 13a.
  As shown in FIG. 3, the chassis 14 has a generally horizontally shallow, generally shallow dish shape 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. 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 (light source accommodating portion) 14b.
  As shown in FIGS. 3 and 4, the bottom plate portion 14 a can receive most of the center side in the short side direction of the light guide plate 16 (part excluding both end portions in the short side direction) from the back side. It can be said that it has a flat plate shape and constitutes a receiving portion for the light guide plate 16. As shown in FIG. 5, both end portions on the short side, which are non-overlapping in plan view with the LED unit LU (LED 17) in the bottom plate portion 14a, fix the frame 13 and the chassis 14 in the assembled state. The second screw member (second fixing member) SM2 is a pair of second screw mounting portions (second fixing member mounting portion, non-light source side fixing member mounting portion) 14a1 to be mounted from the outside. The configuration of the second screw mounting portion 14a1 will be described in detail later together with the second screw mounting portion 22.
  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 overlaps the LED unit LU (LED 17) in a plan view, and is parallel to the bottom plate portion 14a, and the first screw mounting portion (first fixing member) to which the first screw member SM1 is mounted from the outside. Mounting portion, light source side fixing member mounting portion) 14b1 and a pair of side plate portions 14b2 rising from both end portions of the first screw mounting portion 14b1 toward the front side, and the inner side plate of the pair of side plate portions 14b2. The portion 14b2 is continuous with the bottom plate portion 14a. And in the 1st screw mounting part 14b1 in the LED accommodating part 14b, the thermal radiation part 19b of the thermal radiation member 19 which comprises LED unit LU with respect to the inner surface is distribute | arranged in the surface contact state. Further, the outer side plate portion 14b2 in the LED housing portion 14b is inserted into a gap provided between the first screw mounting portion 21 and the side wall portion 13b on the long side, so that the chassis 14 is fixed to the frame 13. And has a function of positioning in the Y-axis direction.
  As shown in FIGS. 6 and 7, a plurality of first screw insertion holes 25 through which the first screw members SM1 are passed are formed in the pair of first screw mounting portions 14b1 of the LED housing portion 14b. . Each first screw mounting portion 14b1 is arranged so as to overlap with the first screw mounting portion 21 of the frame 13 in a plan view. Each first screw insertion hole 25 formed in the first screw mounting portion 14 b 1 communicates with the screw tightening groove portion 21 a of the first screw mounting portion 21. Therefore, the first screw member SM1 is inserted through the first screw 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). The hole 25 is passed and the first screw mounting portion 14b1 is sandwiched between the first screw mounting portion 21 and the screw tightening groove portion 21a. When the first screw member SM1 is tightened, the screw tightening groove portion 21a is threaded with a thread formed on the shaft portion of the first screw member SM1. Incidentally, as shown in FIG. 6, the first screw insertion hole 25 formed in each first screw mounting portion 14b1 has a joint fastening screw insertion hole 25A of a size that allows only the shaft portion of the first screw member SM1 to pass therethrough. As shown in FIG. 7, there is a heat-dissipating member screw insertion hole 25B large enough to pass the head in addition to the shaft portion of the first screw member SM1, and the first screw member SM1 passed through the former is The heat dissipating part 19b and the housing bottom plate part 14b1 are fastened together and attached to the first screw attaching part 21, whereas the first screw member SM1 passed through the latter attaches only the heat dissipating part 19b to the first screw attaching part 21. To work.
  Here, among the fixing structures for fixing the frame 13 and the chassis 14 in the assembled state, the fixing structure arranged on the short side (the non-arrangement side of the LED unit LU (light source)) in the frame 13 and the chassis 14 will be described in detail. To do. As shown in FIG. 5, the short side fixing structure includes a second screw mounting portion 22 provided in the frame 13, a second screw mounting portion 14a1 provided in the chassis 14, and a second screw mounting portion 14a1. And a second screw member SM2 that is attached to the second screw attachment portion 22 while sandwiching. And the positioning hole-like part which positions the light-guide plate 16 about the direction along the plate surface by inserting the above-mentioned 2nd screw attachment part 22 in the edge part 16EP of the short side of the light-guide plate 16 is inserted. 29 is provided. The fixing structure arranged on the long side (the LED unit LU (light source) arrangement side) of the frame 13 and the chassis 14 includes the first screw mounting portion 21 provided on the frame 13 and the chassis as described above. 14 and a first screw member SM1 attached to the first screw attachment portion 21 while sandwiching the first screw attachment portion 14b1. Hereinafter, the configuration of the positioning hole 29 together with the fixing structure on the short side will be described in detail.
  As shown in FIGS. 8 and 11, the second screw attachment portion 22 includes a side wall portion 13 b disposed on the outer end of each short side portion of the panel pressing portion 13 a of the frame 13 and an inner end in the X-axis direction. It is arranged at a position sandwiched (intervened) between the pressing protrusions 24 arranged on the surface. The second screw mounting portion 22 protrudes from the inner surface of each short-side portion of the panel pressing portion 13a toward the back side along the Z-axis direction, and has a substantially cylindrical shape with a substantially circular shape when viewed from above. I am doing. That is, the first screw mounting portion 21 described above has a substantially linear shape when viewed in a plane, whereas the second screw mounting portion 22 has a substantially dotted shape when viewed in a plane. The second screw attachment portion 22 is provided on each of the pair of short side divided frames 13SS constituting the frame 13. The second screw mounting portion 22 is formed with a screw tightening hole portion (fixing member tightening hole portion) 22a that opens toward the back side and can tighten the screw member SM. The screw tightening hole portion 22a is disposed at a concentric position in the second screw mounting portion 22, and the hole size is slightly smaller than the shaft portion of the second screw member SM2. The second screw attachment portion 22 is arranged in a form of being interposed between the panel pressing portion 13a of the frame 13 and the chassis 14 in the Z-axis direction.
  As shown in FIG. 8, the second screw mounting portion 22 is disposed at a position adjacent to the outside with respect to the end surface on the short side of the liquid crystal panel 11, and the direction along the end surface on the same end surface side (Y-axis). 4) along the direction) and are arranged intermittently side by side. Four second screw mounting portions 22 are arranged at the same short side in the short side portion of the panel pressing portion 13a, and are arranged symmetrically. Of the four second screw mounting portions 22 arranged along the Y-axis direction, the two second screw mounting portions 22 disposed at both ends are disposed in the vicinity of the corner portions of the frame 13 and the chassis 14. Of the pair of short side portions in the panel pressing portion 13a, the second screw mounting portion 22 provided on the short side portion overlapping the gate side flexible substrate 26 in a plan view is as shown in FIGS. The gate-side flexible substrate 28 is disposed adjacent to the Y-axis direction in such a manner that the liquid crystal panel 11 projects outward from the short-side end of the liquid crystal panel 11 along the X-axis direction. In other words, the second screw mounting portion 22 and the gate-side flexible substrate 28 are aligned along the Y-axis direction and have a positional relationship overlapping in the X-axis direction. The second screw mounting portions 22 and the gate-side flexible substrate 28 are alternately arranged in a plurality along the Y-axis direction, and between the two second screw mounting portions 22 adjacent in the Y-axis direction. The flexible substrate 28 is interposed.
  As shown in FIGS. 9 to 11, each of the second screw attachment portions 22 having the above-described configuration is arranged at a position overlapping the pair of short side end portions 16EP of the light guide plate 16 in a plan view. Has been. A positioning hole 29 that allows the second screw attachment portion 22 to be inserted is formed in each end 16EP on the short side of the light guide plate 16. The positioning hole-shaped portion 29 has a substantially circular shape when seen in a plan view and has a hole shape penetrating the light guide plate 16 along its thickness direction (Z-axis direction). The positioning hole-shaped portion 29 has a hole diameter slightly larger than the outer diameter of the second screw mounting portion 22, thereby enabling smooth insertion of the second screw mounting portion 22 and heating the light guide plate 16. It is allowed to expand and contract with expansion or thermal contraction. Since this positioning hole-shaped part 29 penetrates the light guide plate 16 in the plate thickness direction, there is a possibility that light propagating through the light guide plate 16 from its inner peripheral surface leaks out. Since it is formed in the end portion 16EP on the short side having 16d and is not disposed opposite to the LED 17, light leakage is less likely to occur. The positioning hole-shaped portion 29 has an endless annular inner peripheral surface and is opposed to the second screw mounting portion 22 inserted over the entire circumference. That is, the positioning hole-shaped portion 29 is formed in the light guide plate 16 as a through hole that does not open outward in the direction along the plate surface of the light guide plate 16 (X-axis direction or Y-axis direction). Accordingly, when the second screw mounting portion 22 is inserted into the positioning hole-shaped portion 29, the opposing peripheral surfaces come into contact with each other, whereby the light guide plate 16 is positioned in all directions in the direction along the plate surface. It is like that. The positioning hole-like portions 29 are arranged intermittently side by side by four along the Y-axis direction in accordance with the arrangement of the second screw attachment portions 22 in the end portion 16EP on the short side of the light guide plate 16. In the same manner as each second screw mounting portion 22, the arrangement is symmetrical. Of the four positioning hole portions 29 arranged along the Y-axis direction, two positioning hole portions 29 disposed at both ends are disposed in the vicinity of the corners of the light guide plate 16. The light guide reflection sheet 20 interposed between the light guide plate 16 and the bottom plate portion 14a of the chassis 14 is formed with a communication hole 20a that communicates with each of the positioning hole-shaped portions 29 described above. Similarly to the portion 29, the second screw attachment portion 22 is inserted. That is, the light guide reflection sheet 20 is positioned by the second screw mounting portion 22 in the same manner as the light guide plate 16.
  As shown in FIG. 11, the positioning hole-like portion 29 having the above structure and the second screw attachment portion 22 inserted into the communication hole 20 a are planar with the LED unit LU (LED 17) in the bottom plate portion 14 a of the chassis 14. Is in contact with the second screw mounting portion 14a1, which is an end portion on the short side that is not superimposed. That is, the second screw mounting portion 14a1 is arranged so as to overlap the second screw mounting portion 22 of the frame 13 in a plan view. A second screw insertion hole 30 for passing the second screw member SM2 is formed in the second screw mounting portion 14a1. The second screw insertion holes 30 are intermittently arranged four by four along the Y-axis direction in accordance with the arrangement of the second screw attachment portions 22 and the positioning hole portions 29 in the second screw mounting portions 14a1. It is arranged with. The second screw insertion hole 30 communicates with the screw tightening hole 22 a of the second screw attachment portion 22. Therefore, the second screw member SM2 is inserted through the second screw 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). The second screw mounting portion 22 is tightened into the screw tightening hole 22a with the second screw mounting portion 14a1 sandwiched between the hole 30 and the second screw mounting portion 14a1. When the second screw member SM2 is tightened, a screw groove is formed in the screw tightening hole 22a by a screw thread formed on the shaft portion of the second screw member SM2.
  The tightening direction (Z-axis direction) of the second screw member SM2 coincides with the overlapping direction of the liquid crystal panel 11, the optical member 15, and the light guide plate 16, as shown in FIG. The frame 13 and the chassis 14 that sandwich the optical member 15 and the light guide plate 16 from the front and back can hold them with a sufficiently high holding force. Thereby, the liquid crystal panel 11, the optical member 15, and the light guide plate 16 which overlap with each other can be held in close contact. The liquid crystal panel 11, the optical member 15, and the light guide plate 16, which are arranged in a stacked manner, are kept in close contact with each other without any gaps. Unevenness is less likely to occur in the planes 11, 15, and 16, thereby improving the display quality of the image displayed on the liquid crystal panel 11. Since the fixing structure on the long side of the frame 13 and the chassis 14 is the same as the fixing structure on the short side described above, the tightening direction of the first screw member SM1 coincides with the Z-axis direction. 11. The optical member 15 and the light guide plate 16 are held by the frame 13 and the chassis 14 with a high holding force over the entire circumference, and are less likely to cause unevenness in brightness, so that the display quality is excellent.
  As described above, the second screw mounting portion 22, which is a fixed structure on the short side of the frame 13 and the chassis 14, is flat with the end portion 16 EP on the short side of the light guide plate 16 as shown in FIGS. 10 and 11. The light guide plate 16 can be positioned by being inserted into the positioning hole 29 formed there. That is, it can be said that the second screw mounting portion 22 serves both as a fixing structure for the frame 13 and the chassis 14 and a positioning structure for the light guide plate 16. Here, if the frame and chassis fixing structure and the light guide plate positioning structure are separately provided, the fixing structure is disposed at least outside the end side portion of the light guide plate. It is necessary to secure an arrangement space for the fixed structure outside the optical plate. In that respect, in this embodiment, since the fixing structure of the frame 13 and the chassis 14 and the positioning structure of the light guide plate 16 are combined, it is not necessary to secure an arrangement space for the fixing structure outside the light guide plate 16. As a result, the width of the frame portion on the outer peripheral side of the liquid crystal display device 10 can be narrowed, and thus the frame can be narrowed. Moreover, in order to securely fix the frame 13 and the chassis 14 as in the present embodiment, a fixing structure is used in which the screw members SM1 and SM2 are tightened along the overlapping direction of the liquid crystal panel 11, the optical member 15, and the light guide plate 16. Other fixing structures (for example, screw members along the X-axis direction or the Y-axis direction from the side with respect to the frame and the chassis) Since the arrangement space of the fixed structure tends to be larger than that of the tightened one), the arrangement of the fixed structure so as to overlap the light guide plate 16 in plan view as described above is more suitable for narrowing the frame. Yes.
  This embodiment has the structure as described above, and the operation thereof will be described subsequently. The liquid crystal display device 10 is manufactured by separately assembling each component (frame 13, chassis 14, liquid crystal panel 11, optical member 15, light guide plate 16, LED unit LU, etc.) manufactured separately. . At the time of assembly, all the components are assembled in a posture that is upside down with respect to the Z-axis direction from the posture shown in FIGS. First, as shown in FIG. 13 and FIG. 14, the frame 13 among the components is set on a work table (not shown) with the back surface facing upward in the vertical direction. The frame 13 is formed in a frame shape as a whole by connecting the four divided frames 13S to each other in advance.
  As shown in FIGS. 13 and 14, the liquid crystal panel 11 has a source-side flexible board 26 and a printed board 27 connected in advance to one end portion on the long side, and a gate-side flexible board 28 connected to one end portion on the short side. It is used for assembly. The liquid crystal panel 11 is assembled to the frame 13 set in the above-described posture while the CF substrate 11a is in the vertical direction and the array substrate 11b is in the vertical direction. At this time, as shown in FIG. 13, the printed board 27 is placed on the first screw mounting portion 21 while its plate surface is in a posture along the surface of the first screw mounting portion 21 of the frame 13 facing the liquid crystal panel 11 side. It is attached. For this reason, the source-side flexible substrate 26 is bent into a substantially L shape in the middle. In this attachment process, each source-side flexible substrate 26 is inserted while being positioned in the X-axis direction with respect to each flexible substrate insertion groove portion 23a of the light guide plate support portion 23 that is in a positional relationship overlapping in plan view. Further, the liquid crystal panel 11 is buffered by receiving the front side surface of the liquid crystal panel 11 by a buffer material 24 a attached to the pressing protrusion 24 in the frame 13. Subsequently, the optical members 15 are sequentially stacked and arranged on the back surface of the liquid crystal panel 11 in order.
  On the other hand, as shown in FIG. 13, an LED unit LU in which the LED 17, the LED substrate 18 and the heat radiating member 19 are integrated in advance is assembled to the frame 13. In the LED unit LU, the LED 17 faces the center side (inner side) of the frame 13, and the heat dissipating part 19 b of the heat dissipating member 19 faces the first screw mounting part 21 of the frame 16. It is attached to the first screw attachment portion 21. In a state where each LED unit LU is attached to each first screw attachment portion 21, each insertion hole 19b1 of the heat dissipation portion 19b is communicated with the screw tightening groove portion 21a of the first screw attachment portion 21. . In addition, regarding the LED unit LU that is in a positional relationship overlapping with the source-side flexible substrate 26 in plan view, when the heat dissipating member 19 is attached to the first screw attachment portion 21, the LED attachment A board housing space BS is formed between the portion 19a and the first screw mounting section 21, and the printed board 27 is housed therein. After the LED unit LU is attached to the first screw attachment portion 21 in this way, the first screw member SM1 is subsequently passed through the predetermined insertion hole 19b1 in the heat radiating portion 19b from the back side, and the first screw attachment portion 21 is tightened. Screwed into the groove 21a. Since the heat radiating portion 19b of the heat radiating member 19 is sandwiched between the head of the first screw member SM1 and the first screw mounting portion 21, the LED unit LU is in a stage before the chassis 14 described below is assembled. The first screw mounting portion 21 is held in an attached state (see FIG. 7). The timing for assembling the LED unit LU to the frame 13 may be before the optical member 15 is assembled or before the liquid crystal panel 11 is assembled.
  When the operation of screwing the LED unit LU to the first screw mounting portion 21 is finished, as shown in FIGS. 13 and 14, the light guide plate 16 is placed on the back side surface of the optical member 15 arranged on the back side. Laminate directly. At this time, as shown in FIG. 14, the positioning hole-like portions 29 formed in the end portions 16EP on both short sides of the light guide plate 16 are flat with respect to the second screw mounting portions 22 in the frame 13. The light guide plate 16 is placed on the optical member 15 along the Z-axis direction while matching the arrangement. If the positional relationship between each second screw attachment portion 22 and each positioning hole-like portion 29 is matched, each positioning hole-like portion 29 is inserted into each second screw attachment portion 22, and thereby the light guide plate 16. Is placed on the optical member 15. In this state, since the outer peripheral surface of each second screw mounting portion 22 is arranged so as to face the inner peripheral surface of each positioning hole-like portion 29 over the entire circumference, the light guide plate 16 has its plate surface. Even if it is going to be displaced in the X-axis direction or the Y-axis direction along the direction, the second screw mounting portion 22 abuts on the positioning hole-shaped portion 29, so that further displacement is restricted. Thereby, the light guide plate 16 is appropriately positioned in all directions in the direction along the plate surface. Further, both end portions 16EP on the long side of the light guide plate 16 are supported from the front side, that is, from the lower side in the vertical direction when assembled, by the light guide plate support portion 23 of the frame 13, as shown in FIG. When the assembly of the light guide plate 16 is completed, the light guide reflection sheet 20 is subsequently stacked and disposed directly on the plate surface 16c of the light guide plate 16 opposite to the light exit surface 16a. The light guide reflection sheet 20 is inserted into the respective communication holes 20a formed at the end portions on both short sides thereof, and the second screw mounting portions 22 are inserted, so that the light guide reflection sheet 20 is similar to the light guide plate 16 described above. Positioning is achieved.
  After the liquid crystal panel 11, the optical member 15, the light guide plate 16, and the LED unit LU are assembled to the frame 13 as described above, the operation of assembling the chassis 14 is subsequently performed. As shown in FIG. 13 and FIG. 14, the chassis 14 is assembled to the frame 13 in a state where the front side surface is oriented downward in the vertical direction. At this time, by inserting each of the housing side plate portions 14b2 outside the LED housing portions 14b of the chassis 14 into the gap between the side wall portions 13b on both long sides of the frame 13 and the first screw mounting portion 21. The chassis 14 is positioned with respect to the frame 13 in the Y-axis direction. In the assembly process, the heads of the first screw members SM1 previously attached to the heat dissipating member 19 and the first screw attaching portion 21 are passed through the respective heat dissipating member screw insertion holes 25B in the LED housing portions 14b of the chassis 14. (See FIG. 7). The bottom plate portion 14a of the chassis 14 is the light guide plate 16 (light guide reflection sheet 20), the second LED mounting portions 14a1 of the bottom plate portion 14a are the second screw mounting portions 22, and the first LEDs of the LED housing portions 14b. When the mounting portion 14b1 is brought into contact with the heat radiating portion 19b of each heat radiating member 19, the second screw member SM2 is inserted into each second screw insertion hole 30 of the second LED mounting portion 14a1 of the bottom plate portion 14a. The first screw members SM1 are passed from the back side through the screw fastening holes 25A for co-tightening of the first LED mounting portion 14b1 of 14b. The first screw member SM1 is clamped in the screw tightening groove 21a of the first screw mounting portion 21 to sandwich the first LED mounting portion 14b1 and the heat dissipation portion 19b of the heat dissipation member 19 with the first screw mounting portion 21. Hold in the state. On the other hand, the second screw member SM2 is held in a state in which the second LED mounting portion 14a1 is sandwiched between the second screw mounting portion 22 by being tightened in the screw tightening hole 22a of the second screw mounting portion 22. As a result, the LED unit LU and the chassis 14 are held between the screw attachment portions 21 and 22 of the frame 13 and the screw members SM1 and SM2 (see FIG. 6). Since each screw member SM1, SM2 attached in this way is arranged on the back side of the chassis 14 constituting the appearance of the back side of the liquid crystal display device 10, the front side, that is, the use using the liquid crystal display device 10 is used. It is difficult for the user to see directly, and the liquid crystal display device 10 has a clean appearance and high design.
  As described above, the assembly of the liquid crystal display unit LDU is completed. Thereafter, the stand mounting member STA and the various substrates PWB, MB, and CTB are assembled on the back side of the liquid crystal display unit LDU, and then the stand ST and the cover member CV are assembled, whereby the liquid crystal display device 10 and the television receiver TV. Is manufactured. The liquid crystal display device 10 manufactured in this way has a liquid crystal panel in addition to a frame 13 that holds the liquid crystal panel 11 from the display surface 11c side and a chassis 14 that constitutes the backlight device 12, respectively. 11 and the optical member 15 are directly laminated, so that the frame 13 and the chassis 14 are separated from each other by a synthetic resin cabinet or the liquid crystal panel 11 and the optical member 15 as in the prior art. Compared to those having a panel receiving member that keeps them in a non-contact manner, the number of parts and assembly man-hours are reduced, so that the manufacturing cost is reduced and the thickness and weight are reduced.
  When the power supply of the liquid crystal display device 10 manufactured as described above is turned on, as shown in FIG. 4, the power supply from the power supply board PWB is received, and various signals are sent from the control board CTB to the printed board 27 and each flexible board. 26 and 28 (each driver DR) is supplied to the liquid crystal panel 11 and its driving is controlled, and each LED 17 constituting the backlight device 12 is driven. The light from each LED 17 is guided by the light guide plate 16 and then transmitted through the optical member 15 so that the light is converted to a uniform plane light and then irradiated to the liquid crystal panel 11. An image is displayed. The operation of the backlight device 12 will be described in detail. When each LED 17 is turned on, the light emitted from each LED 17 enters the light incident surface 16b of the light guide plate 16 as shown in FIG. The light incident on the light incident surface 16b is totally reflected at the interface with the external air layer in the light guide plate 16 or is reflected by the light guide reflection sheet 20 and is propagated through the light guide plate 16. The optical member 15 is emitted from the light exit surface 16a by being reflected or scattered by a reflection unit or a scattering unit (not shown).
  Here, in the liquid crystal display device 10 according to this embodiment, the liquid crystal panel 11 is directly laminated on the light guide plate 16 and the optical member 15, and the panel receiving member is interposed as in the related art. Absent. For this reason, there is a tendency that a higher holding force is required to be applied to the frame 13 and the chassis 14 that sandwich the light guide plate 16, the optical member 15, and the liquid crystal panel 11 that are directly stacked from each other. In that respect, in the liquid crystal display device 10 according to the present embodiment, the screw members SM1 and SM2 that fix the frame 13 and the chassis 14 are in the Z-axis direction, that is, the overlapping direction of the liquid crystal panel 11, the optical member 15, and the light guide plate 16. Therefore, the holding force is directly applied to each of the members 11, 15, and 16 from the overlapping direction. Accordingly, a sufficiently high holding force is applied from the frame 13 and the chassis 14 to the outer peripheral side portions of the light guide plate 16, the optical member 15, and the liquid crystal panel 11 that are directly stacked on each other, so that the liquid crystal panel 11, the optical member 15, The light guide plate 16 is maintained in an intimate contact state over the entire region in the plane. As a result, the amount of light supplied to the display surface 11c of the liquid crystal panel 11 is made uniform within the surface, and the display quality of the displayed image can be improved.
  As described above, the liquid crystal display device (display device) 10 of the present embodiment includes an LED (light source) 17, a liquid crystal panel (display panel) 11 that performs display using the light of the LED 17, and the liquid crystal panel 11. The end surface (light incident surface 16b) is disposed opposite to the LED 17 and the end portion 16EP is disposed outside the end portion of the liquid crystal panel 11. The light guide plate 16 and the frame 13 and the chassis 14 which are a pair of holding portions for holding the liquid crystal panel 11 and the light guide plate 16 from the display surface 11c side and the opposite side are provided. A holding member HM that accommodates the LED 17 between the frame 13 and the chassis 14, and one holding part of the frame 13 and the chassis 14 that are a pair of holding parts A second screw attachment portion (fixing member attachment portion) 22 provided in the ram 13 is attached along the direction in which the liquid crystal panel 11 and the light guide plate 16 overlap with the second screw attachment portion 22, and the second screw attachment. The frame 13 and the chassis 14 that are the pair of holding portions are fixed in the assembled state by sandwiching the chassis 14 that is the other holding portion of the frame 13 and the chassis 14 that are at least a pair of holding portions with the portion 22. The second screw member (fixing member) SM2 and the outer portion of the light guide plate 16 are provided, and one of the second screw attachment portion 22 and the second screw member SM2 is inserted, so that the light guide plate 16 is A positioning hole 29 for positioning in the direction along the plate surface.
  In this way, the light emitted from the LED 17 is incident on the end face of the light guide plate 16 and propagates through the light guide plate 16 before being guided to the liquid crystal panel 11. An image is displayed. The second screw mounting portion 22 provided on the frame 13 that is one holding portion of the frame 13 that is the pair of holding portions and the chassis 14 is in a state where at least the chassis 14 that is the other holding portion is sandwiched. By attaching the screw member SM2, the frame 13 and the chassis 14, which are a pair of holding portions that hold the liquid crystal panel 11 and the light guide plate 16 that overlap each other, are fixed in the assembled state. Since the second screw member SM2 is attached along the direction in which the liquid crystal panel 11 and the light guide plate 16 overlap each other, the overlapping direction from the frame 13 and the chassis 14 as a pair of holding portions to the liquid crystal panel 11 and the light guide plate 16 A sufficiently high holding force can be imparted along. Thereby, even if it is the structure which does not have the panel receiving member interposed between the light-guide plate 16 and the liquid crystal panel 11 like before, the liquid crystal panel 11 and the light-guide plate 16 are stably with sufficient holding power. Can be held.
  Furthermore, the light guide plate 16 extends along the plate surface by either one of the second screw attachment portion 22 and the second screw member SM2 inserted into the positioning hole portion 29 provided in the end side portion 16EP. Positioned with respect to direction. That is, one of the second screw mounting portion 22 and the second screw member SM2 that is a structure for fixing the frame 13 and the chassis 14 as a pair of holding portions also serves as a structure for positioning the light guide plate 16. Therefore, the structure for fixing the frame 13 and the chassis 14 that are a pair of holding portions is arranged outside the end portion 16EP of the light guide plate 16 separately from the structure for positioning the light guide plate 16. Compared to the case, the installation space can be reduced, and the frame portion of the liquid crystal display device 10 can be narrowed. According to this embodiment, a narrow frame can be achieved.
  The frame 13 as one holding part is on the display surface 11c side with respect to the liquid crystal panel 11, and the chassis 14 as the other holding part is on the side opposite to the display surface 11c side with respect to the light guide plate 16. The second screw member SM2 is attached to the second screw attachment portion 22 from the side opposite to the display surface 11c side. If it does in this way, with the other holding | maintenance part distribute | arranged with respect to the flame | frame 13 which is one holding | maintenance part distribute | arranged to the display surface 11c side on the opposite side to the liquid crystal panel 11, the light-guide plate 16, and the display surface 11c side. Since the assembly can be performed in the procedure of attaching the second screw member SM2 to the second screw attachment portion 22 from the side opposite to the display surface 11c side after assembling the chassis 14 in that order. Excellent in productivity and productivity.
  Further, the frame 13 and the chassis 14, which are a pair of holding portions, are external members that constitute the external appearance of the liquid crystal display device 10. If it does in this way, it will become difficult to visually recognize 2nd screw member SM2 from the display surface 11c side on the external appearance, Thereby, the external appearance in the said liquid crystal display device 10 can be made favorable.
  In addition, the light guide plate 16 has a light incident surface (light source facing end surface) 16b arranged to face the LED 17 and an LED non-facing end surface (light source non-facing end surface) 16d not facing the LED 17, The end portion 16EP on the short side of the light plate 16 has an LED non-facing end face 16d and is provided with a positioning hole portion 29. In this way, the light from the LED 17 is incident on the light incident surface 16b of the light guide plate 16 and propagates through the light guide plate 16, but the positioning hole portion 29 has an LED non-facing end surface 16d. Since it is provided in the portion 16EP, it is difficult for light propagating through the light guide plate 16 to leak out from the positioning hole 29 on the way.
  In addition, a gate-side flexible substrate (panel connection member) 28 connected to the end of the liquid crystal panel 11 and protruding outward from the end is provided, and the second screw member SM2 and the second screw mounting portion 22 are provided. Are arranged along the end of the liquid crystal panel 11 with respect to the gate-side flexible substrate 28. In this way, the second screw member SM2 and the second screw mounting portion 22 are located at the end of the liquid crystal panel 11 with respect to the gate-side flexible substrate 28 arranged so as to protrude outward from the end of the liquid crystal panel 11. Since the second screw member and the second screw mounting portion are arranged side by side with respect to the gate side flexible substrate 28, the frame is further narrowed. Can do.
  In addition, the second screw member SM <b> 2 and the second screw attachment portion 22 and the gate side flexible substrate 28 are arranged in a line alternately along the end portion of the liquid crystal panel 11. In this case, the second screw member in the frame 13 and the chassis 14 which are the pair of holding portions, as compared with a case where a plurality of sets of the second screw member SM2 and the second screw mounting portion 22 are arranged continuously. Since the fixing points by the SM2 and the second screw attachment portion 22 are dispersed, the liquid crystal panel 11 and the light guide plate 16 can be held more stably.
  Further, the light guide plate 16 is positioned by inserting the second screw attachment portion 22 into the positioning hole portion 29. In this way, when the light guide plate 16 is assembled to the frame 13 that is one holding portion, the second screw mounting portion 22 provided on the frame 13 that is the one holding portion positions the light guide plate 16. The light guide plate 16 is positioned by being inserted into the hole portion 29. That is, since the light guide plate 16 can be positioned before the chassis 14 as the other holding portion is assembled, it is possible to easily perform operations such as position correction when the light guide plate 16 is displaced. And excellent workability.
  Further, the positioning hole-shaped portion 29 penetrates the light guide plate 16 in the plate thickness direction, and the inner peripheral surface thereof is opposed to any one of the second screw mounting portion 22 and the second screw member SM2 over the entire circumference. There is no. In this way, when either one of the second screw mounting portion 22 and the second screw member SM2 is inserted into the positioning hole-shaped portion 29, the inner peripheral surface of the positioning hole-shaped portion 29 is the second over the entire circumference. Since either one of the screw mounting portion 22 and the second screw member SM2 is opposed, the light guide plate 16 can be positioned in all directions in the direction along the plate surface.
<Embodiment 2>
A second embodiment of the present invention will be described with reference to FIG. 15 or FIG. In the second embodiment, a structure in which the second screw member SM2 is inserted into the positioning hole portion 129 is shown. In addition, the overlapping description about the same structure, an effect | action, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.
  As shown in FIGS. 15 and 16, the second screw attachment portion 122 according to the present embodiment is provided in a form that is continuous with the inner surface of the panel pressing portion 113a of the frame 113 and the inner surface of the side wall portion 113b. It is formed in a substantially block shape that is horizontally long when viewed in a plane. The back surface of the second screw mounting portion 122 is in contact with the end portion 116EP on the short side of the light guide plate 116 from the front side. That is, the second screw mounting portion 122 can be supported from the front side (light emission side) with the light guide plate 116 sandwiched between the second screw mounting portion 122 and the chassis 114, and has a light guide plate support function. A screw tightening hole 122a for tightening the second screw member SM2 is formed at a position eccentric to the inside of the second screw mounting portion 122 so as to open toward the back side. The second screw member SM2 attached to the second screw attachment portion 122 from the back side along the Z-axis direction is sandwiched between the second screw attachment portion 122 and the second screw attachment portion 114a1 of the chassis 114. The light guide plate 16 is inserted into a positioning hole 129 provided in an end portion 116EP on the short side. In the second screw member SM2, the outer peripheral surface of the shaft portion is opposed to the inner peripheral surface of the positioning hole-shaped portion 129 over the entire periphery, thereby causing the light guide plate 116 to extend along the plate surface. Positioning in all directions is possible.
  At the time of assembly, after the members such as the liquid crystal panel 111, the optical member 115, the light guide plate 116, the light guide reflection sheet 120, and the chassis 114 are assembled to the frame 113, the second screw member SM2 is inserted into the second screw insertion hole 130. insert. At this time, if the light guide plate 116 is disposed at a proper position, the insertion of the second screw member SM2 is allowed, and the tightening operation to the second screw attachment portion 122 can be performed as it is. On the other hand, if the light guide plate 116 is displaced from the normal position, the insertion of the second screw member SM2 is restricted. In this case, the light guide plate 116 is aligned and then the second screw member SM2 is attached again. Should be done.
  As described above, according to the present embodiment, the frame 113 that is one holding portion includes the panel pressing portion 113a that presses the liquid crystal panel 111 from the display surface 111c side, and the outer surface portion of the panel pressing portion 113a from the display surface 111c side. And the second screw attachment portion 122 is provided in a form continuous to the side wall portion 113b. If it does in this way, the mechanical strength of the 2nd screw attachment part 122 and side wall part 113b can be raised. As a result, the positional accuracy of the second screw mounting portion 122 is increased, so that the positional accuracy of the light guide plate 116 positioned by the second screw mounting portion 122 or the second screw member SM2 mounted thereon is also increased.
  Further, the light guide plate 116 is positioned by inserting the second screw member SM2 into the positioning hole portion 129. In this way, when the second screw member SM2 is attached to the second screw attachment portion 122 with the liquid crystal panel 111 and the light guide plate 116 being sandwiched between the frame 113 and the chassis 114 which are a pair of holding portions, the second screw The member SM2 is inserted into the positioning hole portion 129 of the light guide plate 116, whereby the light guide plate 116 can be positioned.
  Further, the second screw attachment portion 122 supports the end portion 116EP of the light guide plate 116 from the side opposite to the second screw member SM2. In this way, when the light guide plate 116 is assembled to the frame 113 which is one holding portion, the end of the light guide plate 116 is provided by the second screw mounting portion 122 provided on the frame 113 which is one holding portion. The side portion 116EP can be supported from the side opposite to the second screw member SM2. As a result, deformation such as bending is less likely to occur in the light guide plate 116, so that the positioning accuracy of the positioning hole portion 129 provided in the end side portion 116EP is increased, and the second screw member SM2 inserted therein increases the positional accuracy. Accurate positioning can be achieved.
<Embodiment 3>
A third embodiment of the present invention will be described with reference to FIG. In the third embodiment, the optical member 215 is positioned. In addition, the overlapping description about the same structure, an effect | action, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.
  As shown in FIG. 17, the optical member 215 according to the present embodiment has at least a long side dimension larger than that of the liquid crystal panel 211, and an end side portion 215 EP on the short side side is an end portion of the liquid crystal panel 211. It is arranged in a form protruding outward. The long side dimension of the optical member 215 is approximately the same as or slightly shorter than the long side dimension of the light guide plate 216, and its short side end portion 215 EP is on the short side side of the light guide plate 216. The end portion 216EP overlaps the front side. A second positioning hole 31 is provided in the short side end portion 215EP of the optical member 215 so as to communicate with the positioning hole 229 on the light guide plate 216 side. The second positioning hole-shaped portion 31 has a substantially perfect circle shape when seen in a plan view, and the diameter of the hole is substantially the same as that of the positioning hole-shaped portion 229. The optical member 215 is arranged in the thickness direction (Z-axis direction). It is formed so as to penetrate along. The second positioning hole-shaped portion 31 has a planar arrangement substantially the same as that of the positioning hole-shaped portion 229 on the light guide plate 216 side, and is arranged at a position overlapping the positioning hole-shaped portion 229 when viewed in plan. (See FIG. 9).
  When assembling, when assembling the optical member 215 with respect to the frame 213, the second screw mounting portion 222 is aligned and inserted into the second positioning hole-shaped portion 31, so that the optical member 215 follows the sheet surface. Positioning can be performed in all directions with respect to the direction (X-axis direction and Y-axis direction). When performing this operation, for example, if the panel pressing portion 213a of the frame 213 is in a posture in parallel with the vertical direction, the second screw mounting portion 222 is inserted into the second positioning hole portion 31 of the optical member 215. Thus, the optical member 215 can be suspended from the second screw mounting portion 222 while the sheet surface of the optical member 215 is parallel to the vertical direction. In the same manner, the light guide plate 216 can be suspended from the second screw attachment portion 222. In this way, it is possible to make it difficult for dust or the like to enter between the plurality of optical members 215 or between the optical member 215 and the light guide plate 216 during assembly.
  As described above, according to the present embodiment, the optical member 215 is disposed between the liquid crystal panel 211 and the light guide plate 216 and the end portion 215EP is disposed outside the end of the liquid crystal panel 211. The end portion 215EP of the optical member 215 communicates with the positioning hole portion 229 of the light guide plate 216 and is inserted with either the second screw attachment portion 222 or the second screw member SM2. Thus, a second positioning hole 229 for positioning the optical member 215 in the direction along the plate surface is provided. In this way, the optical member 215 has the second positioning hole portion 229 provided in the end portion 215EP thereof communicating with the positioning hole portion 229 of the light guide plate 216, and both the positioning hole portions 229. When either one of the second screw attachment portion 222 and the second screw member SM2 is inserted, the light guide plate 216 and the light guide plate 216 are positioned in the direction along the plate surface.
<Embodiment 4>
A fourth embodiment of the present invention will be described with reference to FIG. In this Embodiment 4, what changed the form of the positioning hole-shaped part 329 is shown. In addition, the overlapping description about the same structure, an effect | action, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.
  As shown in FIGS. 18 and 19, the positioning hole portion 329 according to the present embodiment penetrates the end portion 316EP on the short side of the light guide plate 316 along the plate thickness direction (Z-axis direction). It is set as the form opened outside along a long side direction (X-axis direction). That is, the positioning hole-shaped portion 329 is formed by partially notching the end portion 316EP of the light guide plate 316 while opening the end portion to the side and partially denting the LED non-facing end surface 316d. . The positioning hole-shaped portion 329 has a substantially semicircular shape when seen in a plan view, and a substantially half of the inside of the second screw mounting portion 322 having a substantially circular shape when seen in a plan view is inserted. For this reason, the second screw mounting portion 322 has a substantially outer half disposed outside the positioning hole portion 329, and is disposed outside the LED non-facing end surface 316d of the light guide plate 316 in the X-axis direction. .
  In the configuration as described above, the second screw mounting portion 322 can be inserted along the Z-axis direction into the positioning hole-shaped portion 329, and can be concavo-convexly fitted along the X-axis direction. . Therefore, when assembling, either a method of attaching the light guide plate 316 to the frame 313 along the Z-axis direction or a method of sliding the light guide plate 316 relative to the frame 313 along the X-axis direction (plate surface). The second screw attachment portion 322 can be inserted into the positioning hole portion 329 even when is selected. As a result, it is possible to diversify the work of assembling the light guide plate 316, and it is possible to obtain effects such as improvement of work efficiency.
  As described above, according to the present embodiment, the positioning hole-shaped portion 329 penetrates the light guide plate 316 in the plate thickness direction and opens to the outside along the plate surface of the light guide plate 316. In this case, for example, the light guide plate 316 is slid in the direction along the plate surface, so that either the second screw attachment portion 322 or the second screw member SM2 is positioned with respect to the positioning hole portion 329. It can be easily inserted. Thereby, diversification of assembling work can be achieved.
<Embodiment 5>
A fifth embodiment of the present invention will be described with reference to FIG. In the fifth embodiment, the planar shapes of the second screw attachment portion 422 and the positioning hole portion 429 are changed. In addition, the overlapping description about the same structure, an effect | action, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.
  As shown in FIG. 20, the second screw attachment portion 422 and the positioning hole-like portion 429 according to the present embodiment have a substantially rectangular shape when viewed in plan. Specifically, the second screw mounting portion 422 and the positioning hole-shaped portion 429 are formed in a substantially square shape when viewed from above, and the inner surface and the outer surface of each of the four sides are opposed to each other. Even with such a configuration, the light guide plate 416 can be properly positioned while ensuring a sufficient holding force and narrowing the frame as in the first embodiment.
<Embodiment 6>
A sixth embodiment of the present invention will be described with reference to FIG. In this Embodiment 6, what changed the form of the positioning hole-shaped part 529 from above-mentioned Embodiment 5 is shown. In addition, the overlapping description about the same structure, an effect | action, and effect as above-mentioned Embodiment 5 is abbreviate | omitted.
  As shown in FIG. 21, the positioning hole portion 529 according to the present embodiment is similar to the above-described third embodiment in that the end portion 516EP on the short side of the light guide plate 516 is in the plate thickness direction (Z-axis direction). And open outward along the long side direction (X-axis direction). That is, the positioning hole-shaped portion 529 is formed by partially notching the end portion 516EP of the light guide plate 516 while opening the end portion to the side and partially denting the LED non-facing end surface 516d. . The entire area of the second screw mounting portion 522 is inserted into the positioning hole-shaped portion 529, and the outer surfaces of the three sides excluding the outer surface facing outward along the X-axis direction are the three sides of the positioning hole-shaped portion 529. Is opposed to the inner surface. Accordingly, the second screw mounting portion 522 is disposed on the inner side in the X-axis direction than the LED non-facing end surface 516d of the light guide plate 516.
  With such a configuration, the second screw mounting portion 522 can be inserted along the Z-axis direction into the positioning hole-like portion 529 as in the third embodiment, and in addition, the X-axis direction The concave and convex can be fitted along. Therefore, when assembling, either the method of attaching the light guide plate 516 to the frame 513 along the Z-axis direction or the method of sliding the light guide plate 516 relative to the frame 513 along the X-axis direction (plate surface). The second screw attachment portion 522 can be inserted into the positioning hole portion 529 even when is selected. As a result, it is possible to diversify the work of assembling the light guide plate 516, and it is possible to obtain effects such as improvement of work efficiency.
<Embodiment 7>
Embodiment 7 of the present invention will be described with reference to FIG. This Embodiment 7 shows what changed arrangement | positioning of the 2nd screw attachment part 622 and the positioning hole-shaped part 629 from above-mentioned Embodiment 6. FIG. In addition, the overlapping description about the same structure, an effect | action, and effect as above-mentioned Embodiment 6 is abbreviate | omitted.
  As shown in FIG. 22, the positioning hole-shaped portion 629 according to the present embodiment includes those arranged at angular positions in the light guide plate 616. Specifically, the light guide plate 616 is cut out at the four corners of the plate surface, thereby penetrating along the plate thickness direction (Z-axis direction) and the long side direction (X-axis direction) and short side direction. Positioning hole portions 629 each having a shape opening outward are formed along (Y-axis direction). A second screw mounting portion 622 is inserted over the entire area of the positioning hole-shaped portion 629 arranged at the corner of the light guide plate 616, and along the X-axis direction and the Y-axis direction of the second screw mounting portion 622. The two outer surfaces facing inward are opposed to the inner surfaces of the two sides of the positioning hole 629. Therefore, the second screw mounting portion 622 is disposed on the inner side in the X-axis direction than the LED non-facing end surface 616d of the light guide plate 616 and disposed on the inner side in the Y-axis direction from the light incident surface 616b.
<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, third, and fourth embodiments described above, the planar shape of the second screw mounting portion and the positioning hole-shaped portion is shown as a circular shape, but the second screw mounting portion and the positioning hole-shaped portion The present invention includes a plane shape that is, for example, an ellipse.
  (2) In the second embodiment described above, the planar shape of the second screw mounting portion connected to the side wall portion of the frame is shown to be a horizontally long square shape. For example, the planar shape is a circular shape, an elliptical shape, a square shape, a vertically long rectangular shape, or the like.
  (3) In the above-described Embodiments 5 to 7, the planar shape of the second screw mounting portion and the positioning hole portion is shown as the square shape, but the planar shape of the second screw mounting portion and the positioning hole portion is shown. For example, a rectangular shape, a vertically long square shape, a rhombus, a triangle, a pentagon or more polygon is also included in the present invention.
  (4) In each of the above-described embodiments, the configuration in which the planar shapes of the second screw attachment portion and the positioning hole-like portion are identical to each other is shown. However, the planar shapes of the second screw attachment portion and the positioning hole-like portion are mutually different. It is also possible to have a configuration that does not match. For example, the planar shape of the positioning hole-shaped portion is circular, and the planar shape of the second screw mounting portion to be inserted therein is rectangular, or conversely, the planar shape of the positioning hole-shaped portion is rectangular and inserted therein It is also possible to make the planar shape of the second screw mounting portion to be circular.
  (5) In Embodiment 4 described above, the second screw mounting portion has a configuration in which about half of the inner side is inserted into the positioning hole-shaped portion, but the second screw mounting to be inserted into the positioning hole-shaped portion. The specific ratio of the part can be changed as appropriate, for example, to 1/3 or 2/3.
  (6) The configuration described in the sixth and seventh embodiments is the same as the configuration described in the fourth embodiment (the configuration in which the second screw mounting portion partially protrudes outside the positioning hole-shaped portion) or the above (5). It is also possible to apply.
  (7) The configuration described in the above-described Embodiments 4 to 7 and the configuration described in (6) above can be similarly applied to the second positioning hole-shaped portion of the optical member.
  (8) The configuration described in the second embodiment (the configuration in which the second screw mounting portion is connected to the side wall portion of the frame) can be applied to other configurations (the first and third to seventh embodiments).
  (9) In each of the embodiments described above, the number of the second screw mounting portions and the positioning hole-shaped portions in the short side portion of the frame and the light guide plate is set to four. Of course, other than four (three or less or five or more) is also possible.
  (10) In addition to the above-described embodiments, the specific arrangement of the second screw attachment portion and the positioning hole-like portion in the short side portion of the frame and the light guide plate can be changed as appropriate.
  (11) In each of the embodiments described above, a pair of LED units (LED substrates) are arranged so as to face the ends on both long sides of the light guide plate. The present invention also includes a pair arranged so as to face the end portions on the short side. In that case, it is preferable to provide the second screw mounting portion and the positioning hole-shaped portion on the long side portion of the frame and the light guide plate where the LED unit is not disposed.
  (12) In addition to the above (11), the present invention also includes an LED unit (LED substrate) that is arranged so as to face an end on one long side or an end on one short side of the light guide plate. include. In that case, it is preferable to provide the second screw mounting portion and the positioning hole-like portion on two or three sides of the frame and the light guide plate where the LED unit is not arranged, but only on one side where the LED unit is not arranged. It is also possible to provide it.
  (13) In addition to the above (11) and (12), the present invention includes an LED unit (LED substrate) that is arranged so as to face the end portions of any three sides of the light guide plate. In that case, it is preferable to provide the second screw mounting portion and the positioning hole-like portion only on one side of the frame and the light guide plate where the LED unit is not disposed.
  (14) In addition to the above (11) to (13), the present invention includes an LED unit (LED substrate) that is disposed so as to face all the ends of the four sides of the light guide plate. In that case, it is preferable to provide the second screw mounting portion and the positioning hole-shaped portion only at the corner portion of the frame and the light guide plate.
  (15) The configuration in which the second screw mounting portion and the positioning hole-like portion are provided only at the corners of the frame and the light guide plate as in (14) described above is such that the LED unit (LED substrate) has one side of the light guide plate, 2 The present invention can also be applied to a configuration in which the side or the end of the three sides is opposed.
  (16) In each of the above-described embodiments, the second screw mounting portion and the positioning hole-shaped portion and the gate-side flexible substrate are alternately arranged. It is also possible to arrange a plurality of parts arranged continuously or arrange a plurality of gate-side flexible substrates arranged continuously.
  (17) In each of the above-described embodiments, the second screw mounting portion and the positioning hole-shaped portion and the gate side flexible substrate are arranged along the Y-axis direction. In addition, the present invention also includes an arrangement in which the positioning hole-shaped portion is provided in the long side portion of the frame and the light guide plate and is arranged along the X-axis direction with respect to the source-side flexible substrate. This configuration can also be applied to the above (16).
  (18) In each of the above-described embodiments, the case where the screw member is used as the fixing member has been described. However, for example, a rivet or the like can be used as another fixing member.
  (19) In each of the above-described embodiments, the second screw mounting portion is provided on the frame arranged on the front side and the second screw member is attached to the chassis from the back side. The present invention includes a configuration in which the second screw mounting portion is provided on the arranged chassis and the second screw member is mounted on the frame from the front side. In this case, the assembly procedure is as follows. After assembling the frame to the chassis, the light guide plate, the optical member, and the liquid crystal panel are sequentially stacked from the front side, and then attaching the second screw member to the frame from the front side. What is necessary is just to make it attach to a 2 screw attachment part. At this time, the configuration is such that the second screw mounting portion of the chassis is inserted into the positioning hole-shaped portion of the light guide plate, or the second screw member is inserted into the positioning hole-shaped portion of the light guide plate, thereby positioning the light guide plate. be able to.
  (20) In each of the above-described embodiments, the source side flexible substrate is connected to the end portion on one long side of the liquid crystal panel. It is good also as a structure which connects a flexible substrate. Similarly, it is good also as a structure which connects a gate side flexible substrate to an edge part of a pair of short side among liquid crystal panels, respectively.
  (21) In addition to the above-described embodiments, the present invention includes those in which the gate side flexible substrate is omitted and those in which the source side flexible substrate is omitted.
  (22) In each of the above-described embodiments, the frame and the chassis are both shown as the appearance members that constitute the appearance of the liquid crystal display device. For example, the chassis is provided with a separately prepared appearance component on the back side. Thus, the present invention also includes a configuration in which the chassis is not exposed to the outside by covering it. In addition to this, the present invention includes a frame and a chassis that are covered with a separately prepared external component so that the frame and the chassis are not exposed to the outside.
  (23) In each of the above-described embodiments, the chassis and the frame constituting the appearance member are made of metal. However, the present invention also includes a case where either one or both of the chassis and the frame is made of synthetic resin. include. This configuration is preferably adopted for small and medium-sized models that do not have high mechanical strength required for liquid crystal display devices.
  (24) In each of the above-described embodiments, the power supply board is provided with the function of supplying power to the LEDs. However, the LED drive board that supplies power to the LEDs is made independent of the power supply board. Are also included in the present invention.
  (25) In the above-described embodiments, the main board is provided with the tuner section. However, the present invention includes a tuner board having the tuner section that is independent of the main board.
  (26) In each of the embodiments described above, the color filter of the color filter included in the liquid crystal panel is exemplified as having three colors of R, G, and B. However, the color part may have four or more colors.
  (27) In each of the embodiments described above, an LED is used as the light source, but other light sources such as an organic EL can be used.
  (28) In each of the embodiments described above, the TFT is used as the switching element of the liquid crystal display device. However, the present invention can also be applied to a liquid crystal display device using a switching element other than the TFT (for example, a thin film diode (TFD)). In addition to the liquid crystal display device for display, the present invention can also be applied to a liquid crystal display device for monochrome display.
  (29) In each of the above-described embodiments, the liquid crystal display device using a liquid crystal panel as the display panel has been exemplified. However, the present invention can also be applied to a display device using another type of display panel.
  (30) In each of the above-described embodiments, the television receiver including the tuner unit is exemplified. However, the present invention is applicable to a display device that does not include the tuner unit. Specifically, the present invention can also be applied to a liquid crystal display device used as an electronic signboard (digital signage) or an electronic blackboard.
  DESCRIPTION OF SYMBOLS 10 ... Liquid crystal display device (display device) 11, 111, 211 ... Liquid crystal panel (display panel), 11c, 111c ... Display surface, 12 ... Backlight device (illumination device) 13, 113, 213, 313, 513 ... Frame (one holding part), 13a, 113a, 213a ... Panel pressing part, 13b, 113b ... Side wall part, 14, 114 ... Chassis (the other holding part), 16, 116, 216, 316, 416, 516, 616 Light guide plate, 16b, 616b ... Light incident surface (light source facing end surface), 16d, 316d, 616d ... LED non-facing end surface (light source non-facing end surface), 16EP, 116EP, 216EP, 316EP, 516EP ... End side portion, 17 ... LED (light source), 22, 122, 222, 322, 422, 522, 622... Second screw mounting portion (fixing member mounting portion), 2 ... Gate side flexible substrate (panel connection member), 29, 129, 229, 329, 429, 529, 629 ... positioning hole-like part, 31 ... second positioning hole-like part, 215 ... optical member, 215EP ... end side part , HM ... holding member, SM2 ... second screw member (fixing member), TV ... television receiver

Claims (15)

  1. A light source;
    A display panel that performs display using light of the light source;
    The display panel is arranged so as to overlap the display surface side opposite to the display panel, the end face is arranged to face the light source, and the end portion is arranged outside the end of the display panel. A light guide plate,
    A holding member configured to hold the display panel and the light guide plate so as to be sandwiched between the display surface side and the opposite side, and holding the light source between the pair of holding portions; ,
    A fixing member mounting portion provided in one holding portion of the pair of holding portions;
    It is mounted along the direction in which the display panel and the light guide plate overlap with the fixing member mounting portion, and at least the other holding portion of the pair of holding portions is sandwiched between the fixing member mounting portion. Thus, a fixing member that fixes the pair of holding portions in an assembled state;
    A positioning hole-shaped portion that is provided in the outer portion of the light guide plate and positions the light guide plate in a direction along the plate surface by inserting one of the fixing member attaching portion and the fixing member; A display device comprising:
  2. The one holding part is arranged on the display surface side with respect to the display panel, and the other holding part is arranged on the side opposite to the display surface side with respect to the light guide plate,
    The display device according to claim 1, wherein the fixing member is attached to the fixing member attachment portion from a side opposite to the display surface side.
  3.   The display device according to claim 2, wherein the pair of holding portions are appearance members that constitute an appearance of the display device.
  4. The one holding portion includes a panel pressing portion that presses the display panel from the display surface side, and a side wall portion that protrudes from the outer portion of the panel pressing portion toward the side opposite to the display surface side. And
    The display device according to claim 2, wherein the fixing member attaching portion is provided in a form continuous with the side wall portion.
  5. An optical member disposed between the display panel and the light guide plate and having an end portion disposed outside the end of the display panel;
    The end portion of the optical member communicates with the positioning hole-shaped portion of the light guide plate, and either one of the fixing member mounting portion and the fixing member is inserted, so that the optical member is The display device according to any one of claims 1 to 4, wherein a second positioning hole-like portion for positioning in a direction along the plate surface is provided.
  6. The light guide plate has a light source facing end surface arranged facing the light source, and a light source non-facing end surface not facing the light source,
    The display device according to claim 1, wherein the end side portion of the light guide plate has the light source non-opposing end face and the positioning hole-shaped portion is provided.
  7. A panel connecting member that is connected to an end of the display panel and is arranged to protrude outward from the end;
    The said fixing member and the said fixing member attaching part are distribute | arranged in the form arranged along with the said edge part of the said display panel with respect to the said panel connection member. Display device.
  8.   The display device according to claim 7, wherein the fixing member, the fixing member attaching portion, and the panel connecting member are alternately arranged in a plurality along the end portion of the display panel.
  9.   The display device according to any one of claims 1 to 8, wherein the light guide plate is positioned by inserting the fixing member attachment portion into the positioning hole-shaped portion.
  10.   The display device according to claim 1, wherein the light guide plate is positioned by inserting the fixing member into the positioning hole portion.
  11.   The display device according to claim 10, wherein the fixing member attaching portion supports the end portion of the light guide plate from a side opposite to the fixing member.
  12.   The positioning hole-shaped portion penetrates the light guide plate in a plate thickness direction, and an inner peripheral surface thereof is opposed to any one of the fixing member mounting portion and the fixing member over the entire circumference. The display device according to claim 1.
  13.   12. The positioning hole according to claim 1, wherein the positioning hole-shaped portion penetrates the light guide plate in a plate thickness direction and opens outward along the plate surface of the light guide plate. Display device.
  14.   The display device according to any one of claims 1 to 13, wherein the display panel is a liquid crystal panel in which liquid crystal is sealed between a pair of substrates.
  15.   A television receiver comprising the display device according to any one of claims 1 to 14.
JP2012054747A 2012-03-12 2012-03-12 Display device and television set Pending JP2013191295A (en)

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JP2012054747A JP2013191295A (en) 2012-03-12 2012-03-12 Display device and television set

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Publication number Priority date Publication date Assignee Title
JP2018117879A (en) * 2017-01-25 2018-08-02 株式会社三共 Game machine

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JPH06231079A (en) * 1993-02-04 1994-08-19 Seiko Epson Corp Upper case unit for electronic equipment intergrated with input and display
JPH08271867A (en) * 1995-03-30 1996-10-18 Mitsubishi Electric Corp Portable information terminal equipment
JPH0990361A (en) * 1995-09-27 1997-04-04 Toshiba Lighting & Technol Corp Back light and liquid crystal display device formed by using the same
JP2008224905A (en) * 2007-03-09 2008-09-25 Sharp Corp Display module, display module assembling method, reinforcing member, and display device
JP2011216275A (en) * 2010-03-31 2011-10-27 Panasonic Corp Backlight unit and liquid crystal display device including the same

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Publication number Priority date Publication date Assignee Title
JPH06231079A (en) * 1993-02-04 1994-08-19 Seiko Epson Corp Upper case unit for electronic equipment intergrated with input and display
JPH08271867A (en) * 1995-03-30 1996-10-18 Mitsubishi Electric Corp Portable information terminal equipment
JPH0990361A (en) * 1995-09-27 1997-04-04 Toshiba Lighting & Technol Corp Back light and liquid crystal display device formed by using the same
JP2008224905A (en) * 2007-03-09 2008-09-25 Sharp Corp Display module, display module assembling method, reinforcing member, and display device
JP2011216275A (en) * 2010-03-31 2011-10-27 Panasonic Corp Backlight unit and liquid crystal display device including the same

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018117879A (en) * 2017-01-25 2018-08-02 株式会社三共 Game machine

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