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
CN100419528CInactive Publication Date: 2008-09-17HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
Publication Date
2008-09-17
Estimated Expiration
Not applicable · inactive patent

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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.
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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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