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Light conducting board and background device

A technology of light guide plate and light reflection, applied in optics, nonlinear optics, diffusing elements, etc., can solve the problem of uneven light emission, and achieve the effect of uniform light emission

Inactive Publication Date: 2008-10-15
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the defect of uneven light emission when the light guide plate and the backlight device in the prior art use a line light source as the light source, the present invention provides a light guide plate and a backlight device that use a line light source and have higher uniformity of light emission

Method used

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  • Light conducting board and background device
  • Light conducting board and background device
  • Light conducting board and background device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Please refer to image 3 with Figure 4 , is a side view of the first embodiment of the light guide plate of the present invention and a schematic diagram of dot distribution on the bottom surface. The light guide plate 32 includes a light incident surface 323 , a light exit surface 321 , multiple light reflecting side surfaces 324 , a bottom surface 322 and a plurality of light diffusing dots 36 distributed on the bottom surface 322 . Wherein, the light guide plate 32 is a rectangular plate, and the light emitting surface 321 and the bottom surface 322 are oppositely disposed.

[0022] The light guide plate 32 is made of transparent materials such as acrylic resin, polycarbonate, polyethylene resin or glass. The light incident surface 323 receives light from a light source (not shown in the figure) and guides it into the light guide plate 32 . The light emitting surface 321 guides the light out of the light guide plate 32 . The light reflective side 324 reflects th...

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Abstract

The light guiding sheet includes the first surface, the second surface opposite to the first one, multiedge side face and multidiffusion unit, of which the second surface is light outgoing face, the diffusion unit is set on the first surface, at least one of multiedge side face is light incoming face and the others are light reflecting faces. The projected area of each diffusion unit in the first surface is direct ratio to distance reciprocal square sum of each coordinate in mirror image linear coordinate point set formed at the light reflecting side face by each coordinate and to each coordinate in at least one linear coordinate point set inside or outside of the multiedge side face. The degree of uniformity of outgoing light at poor light device can be raised by the diffusion unit.

Description

【Technical field】 [0001] The invention relates to a light guide plate and a backlight device using the light guide plate. 【Background technique】 [0002] Since the liquid crystal in the liquid crystal display panel itself does not have luminous characteristics, in order to achieve the display effect, it is necessary to provide a surface light source device for the liquid crystal display panel, such as a backlight device, whose function is to supply a surface light source with sufficient brightness and uniform distribution to the liquid crystal display panel . [0003] The prior art backlight device is mainly composed of a light source, a light guide plate, a reflection plate, a diffuser plate and a prism plate. Wherein, the light source can be arranged on one side or two opposite sides of the light guide plate and emit light to the light guide plate. The function of the light guide plate is to guide the transmission direction of the light so that the light is evenly emitte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/02G02F1/13357G02F1/1335
Inventor 蔡坤荣
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD