Liquid crystal display device
A technology of liquid crystal display device and liquid crystal display panel, which can be applied to identification devices, lighting devices, static indicators, etc., and can solve problems such as uneven brightness
Active Publication Date: 2008-10-01
JAPAN DISPLAY INC +1
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Problems solved by technology
The problem with concentric circular light reflection patterns is that when multiple light emitting diodes are used as light sources, concentric circular light reflection patterns overlap with each other, and various companies are researching countermeasures against uneven brightness in this portion. and development
Method used
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Embodiment 1
[0031] figure 1It is a developed perspective view showing the structure of the main part excluding the liquid crystal display panel, the housing case, etc., of Example 1 for explaining the liquid crystal display device of the present invention. exist figure 1 , the mold case MLD is a substantially rectangular frame-shaped body. The entire molded case MLD is formed of an elastic resin material. Accommodating portions AV1, AV2, and AV3 for light-emitting diodes LED1, LED2, and LED3 serving as light-emitting elements are formed on the inner wall of the first side LW1 of the mold case MLD. In addition, curved protrusions PJ1 and PJ2 protruding inward are formed on a second side LW2 that is an opposite side to the first side LW1 of the mold case MLD.
[0032] The third side LW3 and the fourth side LW4 adjacent to the first side LW1 and the second side LW2 have parallel inner walls SW1 and SW2. The reference sign GLB is a light guide plate made of transparent resin material, a...
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A liquid crystal display device includes a plurality of light emitting diodes mounted on a side wall of a light guide plate so as to irradiate light inside of the light guide plate. On a light reflection surface of the light guide plate, a plurality of light reflection patterns having concentric grooves about the light emitting diodes in the direction equal to the advancing direction of respective main light beams of the light emitting diodes are formed in a state that the plurality of light reflection patterns are divided into a first light reflection pattern region and a second light reflection pattern region respectively corresponding to the light emitting diodes. Between the first light reflection pattern region and a second light reflection pattern region, a light reflection pattern intersecting region where end portions of the light reflection patterns intersect each other is defined.
Description
technical field [0001] The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device having a light guide plate as a light source for diffusing light from a solid light emitting element such as a light emitting diode in a planar manner on the back of a liquid crystal display panel. Background technique [0002] In recent years, liquid crystal display devices that are small, lightweight, and low in power consumption have been widely used as display devices for small portable terminal devices such as mobile phones and portable information terminals. In this kind of liquid crystal display device, a structure using external light as an illuminating device for visualizing the electronic latent image formed on the liquid crystal display panel is adopted, and an auxiliary illuminating device is provided on the front side or the back side of the liquid crystal display panel. structure. The auxiliary lighting device instal...
Claims
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IPC IPC(8): G02F1/1335G02F1/133G09F9/35F21V8/00F21Y101/02G02F1/1333G02F1/13357
CPCG02B6/0091G02F1/133615G02B6/0088G02B6/0068G02F1/133603G02B6/0038
Inventor 斋藤健岛野重雄
Owner JAPAN DISPLAY INC