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Backlight module

A backlight module and light source technology, applied in optics, nonlinear optics, instruments, etc., can solve the problems of easy aging of the light source, uneven light emission of the backlight module, etc., and achieve the effect of reducing uneven brightness and prolonging the service life

Inactive Publication Date: 2007-06-27
INNOCOM TECH SHENZHEN +1
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0012] In order to overcome the above-mentioned problems of uneven light emission of the backlight module and easy aging of the light source, it is necessary to provide a backlight module with uniform light output and prolonging the service life of the backlight module.

Method used

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Examples

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Embodiment Construction

[0024] Please refer to FIG. 3 , which is a three-dimensional schematic view of the backlight module disclosed in the first preferred embodiment of the present invention. The backlight module 2 includes two linear light sources 21 , a light guide plate 23 and a circuit board 25 . The two linear light sources 21 are arranged parallel to the side of the light guide plate 23 . The two linear light sources 21 are respectively electrically connected to the circuit board 25 , and the circuit board 25 is overlapped with the light guide plate 23 .

[0025] The linear light source 21 is a cold cathode fluorescent tube. The cold cathode fluorescent tube is a sealed glass tube filled with an inert gas. When high pressure is applied to both ends of the glass tube, the gas is ionized to generate ultraviolet (UV) light, and the ultraviolet light excites the phosphor coating coated on the inner surface to generate visible light. . The linear light source 21 includes a high voltage end 211 a...

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PUM

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Abstract

The backlight module includes a light guide plate with a light entering face, and at least two light sources in line type. The light sources are setup near to the light guide plate. Each light source in line type includes a high voltage end, and a low voltage end. Moreover, the high voltage end of one light source in line type is setup adjacent to the low voltage end of the other light source in line type. Setting up the high voltage end, and the low voltage end dispersedly, the invention weakens uneven brightness of the backlight module caused by brightness difference between high voltage end and low voltage end of the light source self, as well as prevents light source from defective caused by high temperature. The invention prolongs service life of the backlight module.

Description

【Technical field】 [0001] The invention relates to a backlight module. 【Background technique】 [0002] Since it is used in a display panel of a liquid crystal display or a liquid crystal television, etc., it is required to display a high-brightness picture and the picture has a relatively high uniformity. In order to achieve a better display effect, it is necessary to provide a high-brightness surface light source device for the liquid crystal display panel, such as a backlight module using multiple sets of cold cathode fluorescent tubes, whose function is to supply a surface light source with sufficient brightness and uniform distribution to the liquid crystal display panel . [0003] A backlight module disclosed in the prior art is shown in FIG. 1 . The backlight module 1 includes a light source 10 , a circuit board 15 and a light guide plate 19 . The light source 10 is disposed close to the side of the light guide plate 19 , the circuit board 15 is overlapped with the l...

Claims

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Application Information

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IPC IPC(8): G02F1/13357H01J61/00G02F1/1335
Inventor 许育儒郑永强
Owner INNOCOM TECH SHENZHEN
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