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Back light assembly and its light guide board

A technology of backlight module and light guide plate, which is applied in the direction of optics, diffraction grating, semiconductor devices, etc., can solve the problem of low light uniformity, achieve high light uniformity, and eliminate the effect of incident dark bands

Inactive Publication Date: 2008-09-17
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 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 assembly and its light guide board
  • Back light assembly and its light guide board
  • Back light assembly and its light guide board

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no. 1 approach

[0023] see Figure 4 , is the first embodiment of the backlight module of the present invention, the backlight module 100 includes a plurality of point light sources 110 and a light guide plate 120 . The point light source 110 emits light beams, and the light guide plate 120 guides the transmission direction of the light beams emitted by the point light source 110 and converts them into planar light sources for emission.

[0024] The point light source 210 may be a light emitting diode or a small light bulb, and a plurality of light emitting diodes or small light bulbs of different colors may be configured to adjust the desired display color and brightness.

[0025] The light guide plate 120 is a flat light guide plate made of transparent materials such as acrylic, glass or polycarbonate, and includes a light incident surface 121, a light exit surface 122 connected to the light incident surface 121, and a light exit surface connected to the light exit surface 121. 122 opposit...

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Abstract

The present invention discloses a backlight module ad its light-conducting plate. Said backlight module includes light-conucting plate and point light source, and said light-conducting plate includes light incident face, light emerging face crossed with said lightincident face and bottom face opposite to said light emerging face. the light beam emitted by said point light source is passed through the light incident face and fed into the light-conducting plate according to specific optical field distribution so as to form several light intensity weak zones and the light emerging face is equipped with several gratings, and said several gratings are distributed in the incident light intensity weak zones adjacent to point light sources. Said invented light-conducting plate and its backlight module have higher homogeneity of emerged light.

Description

【Technical field】 [0001] The invention relates to a backlight module and its light guide plate, in particular to a backlight module and its light guide plate applied to liquid crystal displays. 【Background technique】 [0002] Due to 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 properties, it is necessary to provide a backlight module for it to realize the display function. [0003] As we all know, the backlight module needs to have high light uniformity, so as to improve the color contrast, the brightness effect of the full screen area and the viewing angle of the whole machine of the liquid crystal display using the backlight module. [0004] The prior art backlight module includes a light source and a light guide plate. The light source is arra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/13357G02B5/18H01L33/00G02F1/1335
Inventor 蔡坤荣
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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