LIQUID CRYSTAL DISPLAY DEVICE

Abstract

A liquid crystal display device is provided which reduces the weight and cost of a backlight unit and decreases occurrence of brightness spots on the display surface of a liquid crystal display panel.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross-sectional view of an essential part for assistance in explaining the configuration of a liquid crystal display device according to a first embodiment of the present invention;

FIG. 2 is a cross-sectional view of an essential part for assistance in explaining the configuration of a liquid crystal display device according to a second embodiment of the present invention;

FIG. 3 is a cross-sectional view of an essential part for assistance in explaining the configuration of an existing liquid crystal display device; and

FIG. 4 is a cross-sectional view of an essential part for assistance in explaining the problems of the existing liquid crystal display device.

Claims

1. A liquid crystal display device comprising: a liquid crystal display panel configured to have a liquid crystal layer sandwiched between a pair of transparent substrates having a pair of pixel-forming electrodes on an inner surface thereof;a backlight having a light source emitting illumination light to the rear face of the liquid crystal display panel;an optical compensation sheet interposed between the liquid crystal display panel and the backlight; anda frame housing the liquid crystal display panel and the backlight therein;wherein at least single light diffusion film is interposed between the optical compensation sheet and the backlight and at least the single light diffusion film is fixedly retained on at least an upper side of a casing region of the frame by a retaining member.

2. The liquid crystal display device according to claim 1, wherein the light diffusion film is made of a PET resin material as a major ingredient.

3. The liquid crystal display device according to claim 1, wherein the light diffusion film is made of a polycarbonate resin material as a main ingredient.

4. The liquid crystal display device according to claim 1, wherein the light diffusion film has a thickness ranging from 0.1 to 0.2 mm.

5. The liquid crystal display device according to claim 1, wherein the retaining member is a screw.

6. The liquid crystal display device according to claim 1, wherein the retaining member is the frame or a packing.

7. A liquid crystal display device comprising: a liquid crystal display panel configured to have a liquid crystal layer sandwiched between a pair of transparent substrates having a pair of pixel-forming electrodes on an inner surface thereof;a backlight having a light source emitting illumination light to the rear face of the liquid crystal display panel;an optical compensation sheet interposed between the liquid crystal display panel and the backlight; anda frame housing the liquid crystal display panel and the backlight therein;wherein a translucent film is interposed between the optical compensation sheet and the backlight and the translucent film is fixedly retained on at least an upper side of a casing region of the frame by a retaining member.

8. The liquid crystal display device according to claim 7, wherein the translucent film is made of a PET resin material as a main ingredient.

9. The liquid crystal display device according to claim 7, wherein the translucent film is made of a polycarbonate resin material as a main ingredient.

10. The liquid crystal display device according to claim 7, wherein the translucent film has a thickness ranging from 0.1 to 0.2 mm.

11. The liquid crystal display device according to claim 7, wherein the retaining member is a screw.

12. The liquid crystal display device according to claims 7, wherein the retaining member is the frame or a packing.