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Backlight module and method for forming the same

A backlight module and backplane technology, applied in optics, nonlinear optics, identification devices, etc., can solve problems such as energy waste, poor light conversion efficiency, and input power loss

Active Publication Date: 2005-09-07
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Since the multiple cold-cathode lamps 100 of the direct-light backlight module are sequentially arranged above the metal backplane 106, when the cold-cathode lamps 100 are lit, a capacitive effect will be formed between them and the metal backplane 106, This capacitive effect will lead to the generation of leakage current, causing part of the input power to be lost due to the capacitive effect, resulting in energy waste and poor light conversion efficiency.

Method used

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  • Backlight module and method for forming the same
  • Backlight module and method for forming the same
  • Backlight module and method for forming the same

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Embodiment Construction

[0017] figure 2 Shown is a schematic cross-sectional view of a direct-lit backlight module formed according to a preferred embodiment of the present invention. Among them, on a metal back plate 206, a plurality of cold cathode lamps (CCFL) 200 are arranged as light sources, wherein the light sources can also be light-emitting diodes (LEDs), organic light-emitting diodes (OLEDs), tungsten halogen lamps, electroluminescent lamps, etc. (ELD), cathode emitting lamp (CLL) and metal halide lamp; a diffusion plate 204 is located above the cold cathode lamp tube 200, and its main function is to improve the brightness of the front and make the light emitted by the cold cathode lamp tube 200 more evenly distributed. The light source emitted from the cold cathode lamp tube 200 is reflected by the reflector 202 and evenly dispersed upward by the diffusion plate 204 before being emitted from the front.

[0018] When the cold-cathode lamp 200 is turned on, a capacitive effect will be for...

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PUM

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Abstract

This invention provides an apheliotropic module, which comprises a metal back board, a deflector plate mounted on the back board, a diffusing plate mounted on the back board and deflector plate and a plurality of light sources, wherein, in the relative position between light source and metal back board, the module forms a concaved groove with its convex direction far away the light source by an known means to increase the distance between light source and metal back board to lower the capacity effect between them.

Description

technical field [0001] The invention relates to a liquid crystal display, in particular to a backlight module capable of improving the capacitive effect between a light source and a metal backplane. Background technique [0002] The liquid crystal display (LCD) itself does not emit light, so an external light source is necessary, especially the thin film transistor TFT color liquid crystal display usually uses a backlight as a light source. The light source of the backlight module is a cold-cathode fluorescent tube (CCFL) with three wavelengths or a light-emitting diode (LED). Among them, the cold cathode lamp has the characteristics of high brightness, high efficiency, long life, high color rendering, etc., coupled with the cylindrical shape, so it is easy to combine with light reflection elements to form a thin plate illuminator, which is widely used in flat panel displays ( FPD). [0003] The light source module can be divided into two types: backlight type and front li...

Claims

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Application Information

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IPC IPC(8): G02F1/13357G09F9/35
Inventor 蔡宜轩魏庆德
Owner AU OPTRONICS CORP
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