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Back light module and its light guide board

A technology of backlight module and light guide plate, applied in optics, nonlinear optics, diffusing elements, etc., can solve the problem of low light uniformity, and achieve the effect of high light uniformity and elimination of incident dark bands.

Inactive Publication Date: 2005-02-16
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

[0008] In order to overcome the defect of low light uniformity of the prior art backlight system, the present invention provides a backlight module with high light uniformity

Method used

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  • Back light module and its light guide board
  • Back light module and its light guide board
  • Back light module and its light guide board

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Effect test

no. 1 approach

[0020] See Figure 4 , Is the first embodiment of the backlight module of the present invention. The backlight module 200 includes a plurality of point light sources 210 and a light guide plate 220. The point light source 210 emits a light beam, and the light guide plate 220 guides the transmission direction of the light beam emitted by the point light source 210 and converts it into a surface light source to emit it.

[0021] The point light source 210 may be a light emitting diode or a small bulb. In addition, multiple light-emitting diodes or small bulbs of different colors can be configured to adjust the desired display color and brightness.

[0022] Please refer to Figure 5 The light guide plate 220 is in the shape of a flat plate and is made of transparent materials such as acrylic, glass or polycarbonate. It includes a light incident surface 221, a light emitting surface 224 connected to the light incident surface 221, and a light emitting surface 224 The bottom surface 22...

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PUM

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Abstract

The present invention relates to a backlight module and its light-conducting plate. Said backlight module includes light-conducting plate and several point light sources, and said light-conducting plate includes light incident face, light-emerging face crossed with said light incident face and bottom face opposite to the light-emerging face. Said several point light sources are placed correspondently to the light incident face, and in the zone where the light incident face is coupled with point light sources several refractive and scattering fine grains are formed. Said ivnention can reduce incident dark band of the light-conducting plate, so that the light-conducting plate and the backlight module adopting said light-conducting plate have higher homogeneity of emerged light.

Description

【Technical Field】 [0001] The invention relates to a backlight module and a light guide plate thereof, in particular to a light guide plate with high light output uniformity and a backlight module adopting the light guide plate. 【Background technique】 [0002] Because of the advantages of lightness, thinness, and low power consumption, liquid crystal displays are widely used in modern information equipment such as notebook computers, mobile phones, and personal digital assistants. Because the liquid crystal itself does not have light-emitting characteristics, it is necessary to provide a backlight module for it to realize the display function. [0003] The prior art backlight module includes a light source and a light guide plate. The light source is arranged opposite to the light incident surface of the light guide plate. The light guide plate guides the transmission direction of the light beam emitted from the light source and converts a linear light source or a point light sour...

Claims

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Application Information

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IPC IPC(8): G02B5/02G02F1/13357
Inventor 陈弥坚陈云彰
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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