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Back light module

A backlight module and light source technology, applied in optics, nonlinear optics, instruments, etc., can solve the problems of low light utilization rate, high cost and heavy weight of the backlight module, so as to reduce costs, improve light utilization rate, The effect of avoiding light loss

Inactive Publication Date: 2004-07-14
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

[0006] In order to solve the defects of high cost, heavy weight and low light utilization rate of the prior art backlight module, the present invention provides a backlight module with low cost, light weight and high light utilization rate

Method used

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Embodiment Construction

[0014] Please refer to figure 2 , is a schematic structural view of the backlight module 2 according to the first embodiment of the present invention. The backlight module 2 includes a reflection plate 23, a diffusion plate 24, two prism plates 25 and two light sources 21, wherein the reflection plate 23, the diffusion plate 24 and the two prism plates 25 are arranged in sequence, and the surface of the reflection plate 23 231 is opposite to the surface 241 of the diffusion plate 24 , forming a certain space (not shown) therebetween. The surface 231 of the reflecting plate 23 is arranged with a plurality of scattering grid points 20, and the scattering grid points 20 are arranged regularly.

[0015] see image 3 , is a schematic diagram of the optical path of the backlight module 2 according to the first embodiment of the present invention. The two light sources 21 are arranged on the sides of the backlight module 2 , that is, at both ends of the space formed between the r...

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PUM

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Abstract

The back light module includes one reflecting plate, one diffusion plate, two prism plates and at least one light source. The reflecting plate has several scattering nodes arranged on the surface. The back light module has no need of light guiding plate and thus greatly lowered cost and weight, and no absorption of light guiding plate to incident light raises light utilization.

Description

【Technical field】 [0001] The invention relates to a backlight module used for a liquid crystal display. 【Background technique】 [0002] Since the liquid crystal material in the liquid crystal display panel itself does not have luminous properties, in order to achieve the display effect, it is necessary to provide a light source device for the liquid crystal display panel, such as a backlight module, whose function is to provide sufficient brightness and uniform distribution to the liquid crystal display panel. surface light source. [0003] Please refer to figure 1 , is a backlight module 1 of the prior art, the backlight module 1 is mainly composed of a light source 11, a light guide plate 12, a reflector 13, a diffusion plate 14 and two prism plates 15. Wherein, the function of the light guide plate 12 is to guide the light transmission direction, thereby improving the luminance and uniformity of the liquid crystal display panel. In order to improve the utilization effi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1335G02F1/13357
Inventor 刘铭萱
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD