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Direct type backlight source module

A backlight, direct-type technology, applied in the field of direct-type backlight modules, can solve the problems of long light mixing distance, direct-type backlight module can not reach the ideal thickness, etc., to reduce the light mixing distance and realize thin design , uniform light effect

Inactive Publication Date: 2012-07-04
EPILIGHT TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a direct-type backlight module to solve the problem in the prior art that the direct-t

Method used

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Embodiment Construction

[0021] The inventors of the present invention found that: in the existing direct-type backlight module, there are problems including: the light mixing distance in the vertical direction is long, and the use of a diffuser plate structure with a certain thickness for light mixing results in direct-type backlight The problem that the module cannot reach the ideal thickness.

[0022] Therefore, the inventor of the present invention proposes a direct-lit backlight module, which improves the diffuser plate adjacent to the LED array, and mainly opens a light-incident bottom surface of the diffuser plate corresponding to the LED light source in the LED array. The tapered groove and the bottom surface are designed with a dot structure that is conducive to the scattering of LED incident light, which can reduce the required light mixing distance in the vertical direction while ensuring sufficient light mixing, and is conducive to the realization of direct-type backlight modules. Thin des...

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Abstract

The invention provides a direct type backlight source module. The direct type backlight source module comprises a backboard, a printed circuit board, an LED (light-emitting diode) array with a plurality of LED light sources, a reflecting film, a diffusion board, a diffusion film and a brightness enhancement film, and is characterized in that the diffusion board comprises a light-incident bottom surface which is close to the LED array and a light-emitting top surface which is opposite to the light-incident bottom surface, and conical grooves corresponding to the LED light sources in the LED array are arranged on the light-incident bottom surface of the diffusion board. Compared with the prior art, the direct type backlight source module provided by the invention has the advantages that the vertical distance between the LED light sources and the diffusion board is reduced, the light mixing distance required in the vertical direction is reduced under the situation of ensuring full light mixing, and the thickness of the direct type backlight source module is relatively reduced.

Description

technical field [0001] The invention relates to a liquid crystal display device, in particular to a direct-lit backlight source module using an LED light source applied to a liquid crystal display device. Background technique [0002] At present, a liquid crystal display device (Liquid Crystal Display hereinafter referred to as LCD) has become the mainstream in the field of flat panel display. Since the liquid crystal display itself does not emit light, the backlight module is one of the key components of the LCD. The function of the backlight module is to provide sufficient brightness and uniform distribution of light so that it can display images normally. The current LCD backlight is mainly cold cathode tube CCFL and light emitting diode LED. As a new type of backlight, LED has many obvious advantages compared with the traditional CCFL backlight: LED backlight has a better color gamut, the internal driving voltage of LED is much lower than that of CCFL, the brightness ad...

Claims

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Application Information

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IPC IPC(8): F21S8/00F21V5/08F21V19/00G02F1/13357F21Y101/02F21Y115/10
Inventor 范曼宁郝茂盛陈云峰张义荣张洋张黎鑫
Owner EPILIGHT TECH
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