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LCD and back light module

A liquid crystal display and backlight module technology, applied in the direction of instruments, optics, nonlinear optics, etc., can solve the problems of uneven brightness of lamp tubes, degradation of picture quality, uneven brightness of direct-type backlight modules, etc.

Inactive Publication Date: 2005-07-06
BENQ CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If one of the multiple light sources in the direct-type backlight module fails and a new light source is replaced, the brightness of the direct-type backlight module will also be uneven because the brightness of the new light source is brighter than that of the old light source that has been used for a period of time.
If the light source is a strip-type lamp base, the phenomenon of uneven brightness of the lamp will cause the LCD panel to present a strip-like extension of light and dark intervals, so that the picture quality will be greatly reduced

Method used

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Examples

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Embodiment Construction

[0018] Please refer to figure 1 , which shows a perspective view of a backlight module according to a first embodiment of the present invention. The backlight module 100 includes light sources 102 a - 102 e , a circuit board 104 , inverters 106 a - 106 e and a signal adjustment device 108 . The light sources 102 a - 102 e are disposed on the circuit board 104 . The starter 106 is configured on the circuit board 104 for driving the light source 102a. The signal adjustment device 108 is disposed on the circuit board 104 and electrically connected to the starter 106a. By adjusting the signal adjustment device, the brightness of the light source 102a can be adjusted.

[0019] Preferably, the signal adjusting device 108 is an adjustable resistor. The starter 106a is connected in series with the adjustable resistor 108 . The starter 106 a outputs a current I1 to drive the light source 102 a, and the magnitude of the current I1 is related to the resistance of the adjustable resi...

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Abstract

This invention relates to a LCD display and its aphototropism module, which comprises the circuit board, first light source, first signal adjusting device and second light source, wherein the first signal adjusting device is located on the circuit board and connected to the first light source. The first signal adjusting device adjusts the first light source brightness to make the first and second light sources generate same brightness to get a good even brightness of the LCD panel.

Description

【Technical field】 [0001] The present invention relates to a liquid crystal display and its backlight module, and in particular to a liquid crystal display and its backlight module capable of adjusting the brightness of at least one of a plurality of light sources. 【Background technique】 [0002] A traditional Liquid Crystal Display (LCD) uses a backlight module to provide the light required by the LCD panel. The light source of the backlight module must have the characteristics of high brightness and long life. The backlight module is mainly composed of a light source, a light guide panel (Light Guide Panel), a diffuser panel (Diffuser), and a plastic frame. The light source is fixed on the plastic frame, and after the light emitted by the light source is processed by the light guide plate and the diffusion sheet, it will generate light with uniform brightness and enter the liquid crystal display panel. Among them, currently commonly used light sources include cold cathode...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1335G02F1/13357
Inventor 李志华江滋邦
Owner BENQ CORP
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