JP2000267587A - Resin frame and liquid crystal display device equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease the number of parts by imparting a light-diffusing function to a resin frame. SOLUTION: A liquid crystal display panel 31 is disposed between a frame 21 made of a white semitransparent resin and a metal sheet cover 41. An EL panel 43 as back light is attached to the rear face of the frame 21. By this method, the frame 21 has a light-diffusing function, which makes an exclusive diffusion plate unnecessary and decreases the number of parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a resin frame and a liquid crystal display device having the same.

[0002]

2. Description of the Related Art FIG. 3 is a partial sectional view of an example of a conventional liquid crystal display device. In this liquid crystal display device,
An edge light type backlight 3, a diffusion plate 4, and a liquid crystal display panel 5 are housed in this order between a resin frame 1 and a sheet metal cover 2. The backlight 3 includes a light guide plate 6, a reflection plate 7 provided on the back surface of the light guide plate 6, a fluorescent tube 8 provided opposite a predetermined end surface of the light guide plate 6, and an outer periphery of the fluorescent tube 8. And a reflection sheet 9 provided so as to cover the surface. In this case, both ends of the reflection sheet 9 are attached to the front and back surfaces of predetermined ends of the light guide plate 6. The diffusion plate 4 is for diffusing the light emitted from the surface of the light guide plate 6 to make the brightness uniform, and is made of a cloudy translucent resin plate. The liquid crystal display panel 4 has a structure in which liquid crystal (not shown) is sealed between two glass substrates 11 and 12, and polarizing plates 13 and 14 are provided on the front surface of the glass substrate 11 and the back surface of the glass substrate 12, respectively. Has become. A display window 15 is provided at a predetermined position of the cover 2.

The light emitted from the fluorescent tube 8 and the light reflected by the reflection sheet 9 are incident on a predetermined end surface of the light guide plate 6 and are transmitted by a surface light source-forming optical system including the light guide plate 6 and the reflection plate 7. Be transformed into The light converted into the surface light source is emitted from the surface of the light guide plate 6 and diffused by the diffusion plate 4 to make its brightness uniform. The diffused light is applied to the back surface of the liquid crystal display panel 5, and light according to the driving of the liquid crystal display panel 5 is transmitted through the liquid crystal display panel 5 and emitted from the display window 15.

[0004]

By the way, in such a conventional liquid crystal display device, a backlight 3, a diffusion plate 4, and a liquid crystal display panel 5 are housed in this order between a frame 1 and a cover 2. Therefore, there is a problem that the number of parts is relatively large and the thickness is increased. An object of the present invention is to reduce the number of parts.

[0005]

According to a first aspect of the present invention, there is provided a resin frame formed of a resin, having a component storage portion on a front surface side and having a light diffusion function, and a frame provided on the frame body. And a mounting part to another component. According to a fourth aspect of the present invention, there is provided a liquid crystal display device having a liquid crystal display panel housing portion on a front surface side and a light diffusing function, and a frame main body having a light diffusing function. A liquid crystal display panel is housed in the liquid crystal display panel housing section of the resin frame having an attachment section. According to the above invention, since the resin frame has the light diffusion function, a dedicated diffusion plate is not required, and the number of components can be reduced accordingly.

[0006]

FIG. 1 is a plan view of a liquid crystal display device according to an embodiment of the present invention with a cover made of sheet metal removed, and FIG. 2 is a sectional view taken along line AA of FIG. It is shown. This liquid crystal display device has a frame 21 formed of a cloudy translucent resin. The frame 21 includes a rectangular frame main body 23 having a liquid crystal display panel storage recess 22 on the front surface side. In this case, the bottom plate portion of the frame body 23 has a function as a diffusion plate.

A pin 24 for positioning the liquid crystal display panel is provided at a predetermined location on the surface of the bottom plate of the frame body 23. A concave portion 25 for arranging a flexible wiring board is provided at a predetermined position on the side wall of the frame body 23.
At predetermined four locations on the outer surface of the side wall of the frame body 23, projections 26 for attaching a cover are provided. Frame body 2
At other predetermined four places on the outer surface of the side wall of the third side, mounting pieces (mounting parts to other parts) 27 having circular holes or substantially U-shaped holes are provided. At approximately five predetermined locations on the outer periphery of the back surface of the frame body 23, substantially L-shaped engaging pieces 28 for attaching an EL (electroluminescence) panel are provided. Reference numeral 29 denotes a hole for forming the engagement piece 28 by resin molding.

A liquid crystal display panel 31 is positioned and accommodated in a liquid crystal display panel housing recess 22 of a frame 21 by pins 24. The liquid crystal display panel 31 has a structure in which liquid crystal (not shown) is sealed between two glass substrates 32 and 33, and polarizing plates 34 and 35 are provided on the front surface of the glass substrate 32 and the back surface of the glass substrate 33, respectively. Has become. In this case, in FIG.
The lower side protrudes from the lower side of the glass substrate 33 on the back side, and a predetermined semiconductor chip 36 is mounted on the back side of this protruding section. Further, the right side of the glass substrate 33 on the back side protrudes from the right side of the glass substrate 32 on the front side, and another predetermined semiconductor chip 37 is mounted on the surface of the protruding part. A substantially L-shaped portion of the flexible wiring board 38 is joined to each of predetermined positions on the back surface of the protruding portion of the glass substrate 32 on the front surface side and the front surface of the protruding portion of the glass substrate 33 on the back surface side. The remaining linear portion of the flexible wiring board 38 projects outside the frame 21.

A cover 41 made of sheet metal is provided on the front side of the frame 21. In this case, the cover 41 is engaged with the projections 26 of the frame 21 by engaging engagement holes (not shown) provided at four predetermined positions on the side wall of the cover 41.
It is attached to the frame 21. A display window 42 is provided at a predetermined position of the cover 41. Frame 21
A rectangular flat EL panel (backlight) 43 is attached to the five engagement pieces 28.

Light emitted from the surface of the EL panel 43 is diffused by a diffusion plate formed of a bottom plate of the frame body 23 of the frame 21 to make the brightness uniform.
The diffused light is applied to the back surface of the liquid crystal display panel 31, and light according to the driving of the liquid crystal display panel 31 is generated.
1 through the display window 42.

As described above, in this liquid crystal display device, since the frame 21 is provided with a light diffusing function, a dedicated diffusing plate is not required, so that the number of parts can be reduced and the thickness can be reduced. You can also plan.

In the above embodiment, the case where the EL panel 43 is used as the backlight has been described.
The invention is not limited to this, and an edge-light type backlight as shown in FIG. Further, a direct-type backlight may be attached to the back surface of the frame 21.

In the above embodiment, the case where the present invention is applied to a transmission type liquid crystal display device has been described.
It is not limited to this. For example, a reflective liquid crystal display device can be obtained by using a frame made of resin and having a white mirror-finished surface and providing a liquid crystal display panel on the front side of the frame. The frame in this case may have a structure without the engagement piece 28 and the hole 29 in the case shown in FIGS. 1 and 2, for example. In this case, since the frame can be provided with a light reflecting function, a dedicated reflector is not required, and the number of parts can be reduced accordingly, and the thickness can be reduced.

[0014]

As described above, according to the first and fourth aspects of the present invention, since the resin frame is provided with the light diffusing function, a dedicated diffusing plate becomes unnecessary, and the number of parts is reduced accordingly. The thickness can be reduced and the thickness can be reduced. According to the inventions of claims 8 and 10, since the resin frame is provided with a light reflecting function, a dedicated reflector is not required, and the number of parts can be reduced by that much, and the thickness can be reduced. Can also be planned.

[Brief description of the drawings]

FIG. 1 is a plan view of a liquid crystal display device according to an embodiment of the present invention, with a cover made of sheet metal removed.

FIG. 2 is a sectional view taken along the line AA in FIG. 1;

FIG. 3 is a partial cross-sectional view of an example of a conventional liquid crystal display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Frame 22 Recessed part for liquid crystal display panel storage 26 Projection for cover attachment 27 Attachment piece (attachment part to other parts) 28 Engagement piece for EL panel attachment 31 Liquid crystal display panel 41 Cover 43 EL panel

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H089 HA40 JA10 QA11 QA12 QA13 TA18 5G435 AA17 AA18 BB12 DD13 EE05 EE26 EE27 EE37 EE47 FF03 FF08 GG24 GG25

Claims (11)

[Claims] 1. A frame main body formed of resin and having a component storage portion on the front surface side and having a light diffusion function, and a mounting portion for attaching another component provided on the frame main body. Resin frame. 2. The resin frame according to claim 1, wherein a mounting portion for mounting a backlight is provided on a back side of the frame main body. 3. The method according to claim 1, wherein
A resin frame, wherein an attachment portion for attaching a sheet metal cover to the frame body is provided. 4. A resin frame comprising a frame body formed of resin and having a liquid crystal display panel housing portion on the front side and having a light diffusion function, and a mounting portion for mounting other components provided on the frame body. A liquid crystal display device, wherein a liquid crystal display panel is stored in the liquid crystal display panel storage section. 5. The liquid crystal display device according to claim 4, wherein a backlight is attached to a back side of the resin frame. 6. The liquid crystal display device according to claim 5, wherein the backlight is an EL panel. 7. The liquid crystal display device according to claim 4, wherein a sheet metal cover is attached to a front side of the resin frame. 8. A frame body formed of a resin, having a component storage portion on the front surface side and having a light reflecting function, and a mounting portion for attaching another component provided on the frame body. Resin frame. 9. The resin frame according to claim 8, wherein an attachment portion for attaching a sheet metal cover to the frame main body is provided. 10. A resin frame comprising a frame body formed of resin and having a liquid crystal display panel accommodating portion on the surface side and having a light reflecting function, and a mounting portion for attaching another component provided on the frame body. A liquid crystal display device, wherein a liquid crystal display panel is stored in the liquid crystal display panel storage section. 11. The liquid crystal display device according to claim 10, wherein a cover made of sheet metal is attached to a surface side of the resin frame.