Sidelight type LED dynamic backlight module and liquid crystal display device

A technology of dynamic backlight and LED light source, applied in lighting devices, fixed lighting devices, optics, etc., can solve the problems of light leakage and low contrast of screen display.

Active Publication Date: 2013-07-31
JIANGSU GENTURE ELECTRONICS INFORMATION SERVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies in the prior art, the present invention discloses a side-light LED dynamic backlight module. There is a phenomenon of light leakage, which makes the screen display contrast not high

Method used

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  • Sidelight type LED dynamic backlight module and liquid crystal display device
  • Sidelight type LED dynamic backlight module and liquid crystal display device
  • Sidelight type LED dynamic backlight module and liquid crystal display device

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Embodiment Construction

[0019] Instructions attached figure 1 It is a structural cross-sectional view of an edge-lit LED dynamic backlight module. 20 is a strip-shaped light guide plate coupled to the upper layer, distributed horizontally (or vertically), 10 is the LED light source at both ends, and 30 is a strip-shaped light guide plate coupled to the lower layer, distributed vertically (or horizontally). 40 is a diffusion sheet, and 50 is a prism sheet (brightening sheet). The diffuser 40 is generally made of PET (polyethylene terephthalate) or PC (polycarbonate) substrate, with a smooth front and a rough reverse. The function of the diffuser is to refract, reflect and Diffusion, making the backlight more uniform. The prism sheet 50 is a light concentrating device, which utilizes the laws of total reflection and refraction to concentrate the dispersed light in a certain angle range and emit it so as to improve the brightness in the output range.

[0020] Instructions attached figure 2 It is a ...

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Abstract

The invention belongs to the technical study field of liquid crystal display backlight and relates to a sidelight type LED (light-emitting diode) dynamic backlight module. The backlight module consists of LED light sources, a light guide module and an optical diaphragm covering the surface of the light guide module, and is characterized in that the light guide module consists of two light guide layers; each light guide layer is spliced by a plurality of strip light guide plates; the strip light guide plates are coupled with the independent brightness-adjustable LED light sources respectively; and the area brightness adjustment of the sidelight type LED dynamic backlight module is realized. A sidelight type LED dynamic backlight device comprises a backlight brightness controller, an image display signal compensation controller, the sidelight type LED dynamic backlight module and an LCD (liquid crystal display) panel and has the advantages of uniform backlight brightness, high brightness, high image display contrast and power saving.

Description

technical field [0001] The invention belongs to the field of liquid crystal display backlight technology research, and relates to a side-light LED dynamic backlight module and a liquid crystal display device. Background technique [0002] The LCD itself does not emit light, it relies on the backlight to pass light through the LCD to display the image. LED (Light Emitting Diode) has gradually replaced the traditional CCFL (Cold Cathode Fluorescent Lamp) due to its advantages of low power consumption, wide color gamut, energy saving and environmental protection, and no pollution, and is used as the backlight of LCD. [0003] There are two types of LED backlight modules: direct-lit and side-lit. In the direct type, the LED crystal grains are evenly arranged behind the LCD panel as a light source, and the backlight can evenly reach the entire screen. However, for a large-sized display, a large number of LED crystal grains are required, and the cost is relatively high. Moreover...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S8/00F21V8/00G02F1/13357F21Y101/02F21Y115/10
Inventor 都思丹李杨储培汪琪刘佳赵康僆赵静姜华徐俊梅姜新
Owner JIANGSU GENTURE ELECTRONICS INFORMATION SERVICE CO LTD
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