JP2014016562A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology enabling an even narrower frame in a thin display device.SOLUTION: A liquid crystal display panel 70 includes: a panel outer frame chassis 50; a back chassis 60; and a panel cover 40. The panel cover 40 includes: a panel cover body 41; and a dust intrusion prevention part 42 exposing on a side face. The dust intrusion prevention part 42 forms a screw accommodation recess part 43 toward the outside. At this screw accommodation recess part 43, a tip part of a screw 90 is accommodated. As a concrete fixing structure, as shown in a fixing region X1 in a side face part of the liquid crystal display device 10, from the outside toward the inner part side, a back cover side face 32 of a back cover 30, a front cover side face 22 of a front cover 20 and a chassis side face part 52 are overlapped and fixed by the screw 90.

Description

  The present invention relates to a display device, and more particularly to a display device having a backlight.

  In general, in a conventional liquid crystal display panel fixing structure, the fixing portion of the liquid crystal display panel has a mounting portion formed on a side of a panel frame that supports a panel made of a glass substrate or the like as a panel cover. The structure is fixed with screws.

  5 and 6 show a panel fixing structure in liquid crystal display devices 410 and 510 having a conventional structure. As shown in the figure, in the fixing structure of the display panels 470 and 570, the front covers 420 and 520 and the back covers 430 and 530 covering the display panels 470 and 570 are fixed to the display panels 470 and 570 with screws 490 and 590, respectively. The front covers 420 and 520 and the display panels 470 and 570 are fixed by screws 490 and 590 from the back covers 430 and 530 side.

  Various structures have been proposed for the fixing structure of the liquid crystal display panel. For example, a technique for screwing the display panel to the front cover from the back has been proposed (see, for example, Patent Document 1). Further, a technique for fixing a sheet metal / housing to the side surface of the panel has been proposed (see, for example, Patent Document 2). Furthermore, a technique for fixing the housing to the side surface of the rear frame has been proposed (see, for example, Patent Document 3).

JP 2000-10082 A JP 2003-295789 A JP 2008-216934 A

  By the way, the tendency of narrowing the frame in a thin display device typified by a liquid crystal television is increasing. Under such circumstances, in the fixing method shown in FIGS. 5 and 6, the cover side boss space for securing the cover is secured, and the space for the panel mounting portion for fastening the front and back covers and the panel together with screws. For this reason, there was a problem of hindering the narrow frame. Similar problems remain in the techniques of Patent Documents 1 to 3, and a technique for improvement has been demanded.

  This invention is made | formed in view of the above situations, Comprising: It aims at providing the technique which solves the said subject.

The present invention is a display device having a backlight cover that covers a back surface of a backlight, and a front cover having a shape that covers the backlight cover from a side surface, and the backlight cover extends to a side surface of the backlight. And a fixing portion that fixes the front cover and the backlight cover with screws on the side surface side of the backlight.
Further, the front cover and the backlight cover may have an uneven fitting structure on the side surface.
The backlight cover may include a rib that contacts the rear chassis of the display panel.

  ADVANTAGE OF THE INVENTION According to this invention, the technique which enables the further narrow frame in a thin display apparatus can be provided.

It is sectional drawing of the liquid crystal display device based on 1st Embodiment. It is sectional drawing of the liquid crystal display device based on 2nd Embodiment. It is sectional drawing of the liquid crystal display device based on 3rd Embodiment. It is sectional drawing of the liquid crystal display device based on 4th Embodiment. It is sectional drawing of the liquid crystal display device based on a prior art. It is sectional drawing of the liquid crystal display device based on a prior art.

  Next, modes for carrying out the present invention (hereinafter, simply referred to as “embodiments”) will be specifically described with reference to the drawings. In the following, a liquid crystal display device is exemplified as a display device having a backlight, but the present invention is not limited to this.

<First Embodiment>
FIG. 1 is a cross-sectional view showing a schematic structure of a liquid crystal display device 10 according to the present embodiment. In particular, attention is paid to a fixing structure of a liquid crystal display panel 70, a front cover 20, and a back cover 30 in a side surface portion of the liquid crystal display device 10. FIG. Note that the fixing structure is provided at a plurality of locations.

  As shown, the front cover 20 covers the liquid crystal display panel 70 from the front side, and the back cover 30 covers the back side. The front cover 20 covers the side surface and the vicinity of the side surface of the liquid crystal display panel 70 at the side surface and the vicinity thereof, and in this embodiment, the portion covering the front side (front cover flat surface portion 21) is very narrow.

  In the liquid crystal display device 10, the front cover 20, the back cover 30, and the liquid crystal display panel 70 are collectively fixed from the side surface side. By adopting such a structure, the space conventionally required for the screw fixing boss and the cover fixing panel sheet metal is eliminated.

  The liquid crystal display panel 70 accommodates the display panel main body and is fixed to the front cover 20 and the like. The liquid crystal display panel 70 is housed in the front panel outer frame chassis 50 and the rear rear chassis 60 as outer frames and in the interior and partially on the side. And an exposed panel cover 40.

  The panel cover 40 includes a panel cover main body 41 and a dust intrusion preventing portion 42 exposed at a side surface. The dust entry preventing portion 42 has a screw accommodating recess 43 formed outward. The screw housing recess 43 accommodates a tip portion of a screw 90 described later.

  As a specific fixing structure, as shown in the fixing region X1 of the side surface portion of the liquid crystal display device 10, the back cover side surface 32 of the back cover 30, the front cover side surface 22 of the front cover 20, and the chassis from the outside toward the inside. The side parts 52 are overlapped and fixed by screws 90. More specifically, screw holes 33, 23, and 53 are formed in the back cover side surface 32, the front cover side surface 22, and the chassis side surface portion 52, respectively. The screw hole 33 of the back cover 30 and the screw hole 23 of the front cover 20 are merely through holes and are formed slightly larger than the diameter of the screw 90. On the other hand, the screw hole 53 of the panel outer frame chassis 50 is screwed so that the screw 90 is screwed.

  Then, when the back cover side surface 32, the front cover side surface 22 and the chassis side surface portion 52 are overlapped with each other, the screw holes 33, 23 and 53 are aligned, and the screw 90 can be screwed and fixed.

  At this time, in order to appropriately align the front cover 20 and the back cover 30, an uneven fitting structure is provided on the screw holes 23 and 33 side. That is, the temporary fixing claw 24 having a triangular cross section is formed on the front cover plane portion 21 toward the outside. Further, as a structure in which the temporarily fixing claw 24 is arranged and fitted, a concave claw locking recess 34 is formed on the inner surface side of the back cover side surface 32.

  In addition, the periphery of the screw hole 53 into which the screw 90 is screwed in the chassis side surface portion 52 is formed in a cylindrical shape that is convex toward the inner side, and appropriate screwing is possible.

  In the screw 90, the tip end portion of the chassis side surface portion 52 exposed from the cylindrical screw hole 53 is accommodated in the screw accommodating recess 43. Here, the concave shape has two steps, the space behind which the tip portion of the screw 90 is accommodated is narrow, and the space where the cylindrical portion around the screw hole 53 is accommodated is wide. As a result, the tip portion of the screw 90 and the cylindrical portion around the screw hole 53 are accommodated without contacting the inner wall surface of the screw accommodating recess 43. In this way, by adopting the bag path structure, it is possible to prevent dust from entering the liquid crystal display panel 70 in the fixed region X1 of the side surface portion of the liquid crystal display device 10.

  In general, when the front cover 20 and the back cover 30 are fastened and fixed to the liquid crystal display panel 70, the holes may be displaced at the time of mounting and the screws may not be fastened. However, the screw holes 23 and 33 of the front cover 20 and the back cover 30 are set to be slightly larger than the diameter of the screw 90, and the temporary fixing claw 24 and the claw locking recess 34 are provided to enable temporary fixing. The fixing of 90 can be performed without causing a displacement.

<Second Embodiment>
FIG. 2 is a cross-sectional view showing a schematic structure of the liquid crystal display device 110 according to the present embodiment. In particular, focusing on the fixing structure of the liquid crystal display panel 170, the front cover 120, and the back cover 130 in the side surface portion of the liquid crystal display device 110. FIG.

  As in the first embodiment, the liquid crystal display device 110 includes a panel outer frame chassis 150, a rear chassis 160, and a panel cover 140 that is housed inside and exposed to a part of the panel cover 140.

  The panel cover 140 includes a panel cover main body 41 and a dust intrusion prevention unit 142. The dust entry preventing portion 142 has a screw accommodating recess 143 formed outward.

  Specifically, as shown in the fixing region X2 of the side surface portion of the liquid crystal display device 10, the back cover side surface 132, the front cover side surface 122, and the chassis side surface portion 152 are overlapped and fixed by screws 190 from the outside toward the inside. Has been. That is, the order in which the front cover 120 and the back cover 130 overlap on the side surfaces is different from that of the first embodiment.

  More specifically, screw holes 123, 133, and 153 are formed in the front cover side surface 122, the back cover side surface 132, and the chassis side surface portion 152, respectively. The screw hole 133 of the back cover 130 and the screw hole 123 of the front cover 120 are merely through holes and are formed slightly larger than the diameter of the screw 190. On the other hand, the screw hole 153 of the panel outer frame chassis 150 is screwed so that the screw 190 is screwed.

  When the front cover side surface 122, the back cover side surface 132, and the chassis side surface portion 152 are overlapped with each other, the screw holes 123, 133, and 153 coincide with each other, and the screw 190 can be screwed and fixed.

  At this time, in order to properly align the front cover 120 and the back cover 130, an uneven fitting structure is provided on the screw holes 123 and 133 side. That is, a convex (spherical) back cover pressing convex portion 134 is formed on the back cover side surface 132 toward the outside. Further, a concave inner wall side concave portion 124 is formed on the inner surface side of the front cover side surface 122 as a structure that fits with the back cover pressing convex portion 134.

  In addition, the periphery of the screw hole 53 into which the screw 90 is screwed in the chassis side surface portion 52 is formed in a cylindrical shape that is convex toward the inner side, and appropriate screwing is possible.

  In the screw 190, the tip portion of the chassis side surface portion 152 exposed from the cylindrical screw hole 153 is accommodated in the screw accommodating recess 143. In the present embodiment, a screw head housing recess 128 is formed to prevent the head of the screw 90 from protruding from the side surface 122 of the front cover.

  In general, when the front cover 20 and the back cover 30 are fastened and fixed to the liquid crystal display panel 70, the holes may be displaced at the time of mounting and the screws may not be fastened. However, the screw holes 23 and 33 of the front cover 20 and the back cover 30 are set to be slightly larger than the diameter of the screw 90, and the temporary fixing claw 24 and the claw locking recess 34 are provided to enable temporary fixing. The fixing of 90 can be performed without causing a displacement.

  Furthermore, screw holes 123 and 133 which are joint fastening holes of the front cover 120 and the back cover 130 have a predetermined clearance so that the screws 190 can pass therethrough. However, the liquid crystal display panel 170 may be insufficiently pressed against the front cover 120, and a gap may be generated between the liquid crystal display panel 170 and the front cover 120.

  Therefore, in the present embodiment, panel holding ribs 138 are provided on the back cover 130. Here, it is provided at a plurality of locations in the corner portion between the back cover flat portion 131 and the back cover side surface 132 (only one location is illustrated in the figure). The panel holding rib 138 acts to push the rear chassis 160.

  Thus, by providing the projection (panel holding rib 138) on the back cover 130, a force that the panel holding rib 138 pushes the liquid crystal display panel 170 is generated, and as a result, the liquid crystal display panel 170 and the front cover 120 are separated from each other. It is possible to prevent a gap from occurring between them.

<Third Embodiment>
FIG. 3 is a cross-sectional view showing a schematic structure of the liquid crystal display device 210 according to the present embodiment. In particular, focusing on the fixing structure of the liquid crystal display panel 270, the front cover 220, and the back cover 230 in the side surface portion of the liquid crystal display device 210. FIG.

  In the present embodiment, the front cover 220 and the back cover 230 are not fixed to the liquid crystal display panel 270, but the front cover 220 and the back cover 230 are fixed to each other on the side of the panel.

  As illustrated, the liquid crystal display panel 270 includes a panel outer frame chassis 250 that is a front and side chassis, and a rear chassis 260 that is a rear chassis. The panel outer frame chassis 250 includes a chassis front surface portion 251 that covers the front surface and the chassis side surface portion 252 that is formed integrally with the front surface portion 251 and covers the side surface. Here, the rear chassis 260 is also partially formed on the side surface portion. This portion is flush with the chassis side surface portion 252 of the panel outer frame chassis 250 and abuts against the inner wall surface of the front cover side surface 222 in common.

  In such a structure, the liquid crystal display panel 270 may not be fixed. Accordingly, a panel holding rib 238 for holding and fixing the liquid crystal display panel 270 from the cover side is provided, and the front cover 220 and the back cover 230 are held in a state where the liquid crystal display panel 270 (rear chassis 260) is pressed by the panel holding rib 238. Are fixed from the side of the panel.

  The front cover 220 and the back cover 230 are fixed by screws 290 in the vicinity of the rear surface and in the vicinity of the region where the panel holding rib 238 is provided. That is, on the side surface near the back surface, screw holes 223 and 233 are provided in the front cover side surface 222 and the back cover side surface 232, and the front cover side surface 222 and the back cover side surface 232 are fixed by the screws 190. .

  As described above, according to the present embodiment, even when the front cover plane portion 221 of the front cover 220 is narrowed, the front cover 220 and the back cover 230 are appropriately fixed and the liquid crystal display panel 270 is accommodated. Can do. Further, since the liquid crystal display panel 270 can be pressed against the front cover flat portion 221 of the front cover 220 by the panel holding rib 238, an inappropriate gap is formed between the liquid crystal display panel 270 and the front cover flat portion 221. Can be prevented.

<Fourth Embodiment>
FIG. 4 is a cross-sectional view showing a schematic structure of the liquid crystal display device 110a according to the present embodiment. In particular, focusing on the fixing structure of the liquid crystal display panel 170, the front cover 120, and the back cover 130 in the side surface portion of the liquid crystal display device 110a. FIG.

  This embodiment is a modification of the second embodiment. The difference from the second embodiment is that an inner wall side uneven portion 124a is provided instead of the inner wall side concave portion 124, and the back cover pressing convex portion 134 is replaced. Is provided with a back cover side uneven portion 134a.

  More specifically, as shown in the figure, a back cover side uneven portion 134 a having a triangular cross section (sawtooth shape) is formed on the outer portion of the back cover side surface 132 instead of the back cover pressing convex portion 134. . Further, an inner wall side uneven portion 124 a having a triangular cross section (sawtooth shape) is formed on the inner wall surface of the front cover side surface 122 instead of the inner wall side concave portion 124. The inner wall side uneven portion 124a and the back cover side uneven portion 134a mesh with each other, thereby preventing positional displacement.

  The present invention has been described based on the embodiments. This embodiment is an exemplification, and it is understood by those skilled in the art that various modifications can be made to combinations of the respective components and the like, and such modifications are within the scope of the present invention.

10, 110, 110a, 210 Liquid crystal display device 20, 120, 220 Front cover 21, 121, 221 Front cover plane portion 22, 32, 122, 222 Front cover side surfaces 23, 33, 53, 123, 133, 153, 223, 233 Screw holes 30, 130, 230 Back cover 31, 131, 231 Back cover flat portion 32, 132, 232 Back cover side surface 24 Temporary fixing claw 34 Claw locking recess 40, 140 Panel cover 41, 141 Panel cover main body 42, 142 Dust intrusion prevention part 43, 143 Screw housing recess 50, 150, 250 Panel outer frame chassis 51, 151, 251 Chassis front part 52, 152, 252 Chassis side part 60, 160, 260 Rear chassis 70, 170, 270 Liquid crystal display Panel 90, 190, 290 screw 24 inner wall recesses 124a inner wall irregular portion 128, 228 bis head accommodating recess 134 back cover pressing protrusion 134a back cover side uneven portions 138, 238 Panel suppressing rib

Claims (3)

A display device having a backlight cover that covers a back surface of a backlight, and a front cover having a shape that covers the backlight cover from a side surface,
The backlight cover is formed to extend to the side surface of the backlight,
A display device comprising: a fixing portion that fixes the front cover and the backlight cover with screws on a side surface side of the backlight.   The display device according to claim 1, wherein the front cover and the backlight cover have a concave-convex fitting structure on a side surface.   The display device according to claim 1, wherein the backlight cover includes a rib that comes into contact with a rear chassis of the display panel.

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