A multi-lamp dimming control method for the cold cathode lamp tube

A dimming control and cold cathode technology, applied in the field of multi-lamp dimming technology, multi-lamp dimming control of cold cathode lamps, and can solve problems such as large proportion gap, large starting voltage and current, and surge.

Inactive Publication Date: 2007-10-24
CHUNTEX ELECTRONICS
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Problems solved by technology

[0005] From the above, it can be known that the existing backlight modules of flat panel displays use cold cathode lamps as light sources and must turn on / off the lamps repeatedly when performing pulse dimming, thus causing a large starting voltage and current surge. In this mode, due to the large difference in the ratio of the on / off cycle, the maximum low-brightness dimming will flicker
[0006] It can be seen that the above-mentioned existing cold cathode lamp dimming control method obviously still has inconvenience and defects in method and use, and needs to be further improved urgently.
In order to solve the problems existing in the cold-cathode lamp dimming control method, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and the general method has no suitable method to solve it. The above-mentioned problems are obviously the problems that relevant industry players are eager to solve

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  • A multi-lamp dimming control method for the cold cathode lamp tube
  • A multi-lamp dimming control method for the cold cathode lamp tube
  • A multi-lamp dimming control method for the cold cathode lamp tube

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[0035] In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, in conjunction with the accompanying drawings and preferred embodiments, the multi-lamp dimming control method for cold cathode lamps proposed according to the present invention will be specifically implemented. Ways, methods, steps, features and effects thereof are described in detail below.

[0036]The present invention is mainly a dimming process in a multi-lamp environment, which consists of a linear dimming stage and a pulse mode dimming stage, please refer to Figure 1, which is a curve of a backlight module reducing brightness from maximum brightness to downward As shown in the figure, when the brightness of the lamp is adjusted downward from the highest point, it first enters the linear dimming stage (L), and then enters the pulse mode dimming stage (B), until the required brightness is adjusted to complete the entire dimming proce...

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Abstract

The disclosed multi-tube light control method for cold cathode lamp comprises: firstly regulating system output current to minimal by linear way, then entering the burst mode for light control. This invention reduces the duty ratio, and decreases voltage / current burst.

Description

technical field [0001] The present invention relates to a dimming control method for cold cathode lamps, in particular to a multi-lamp dimming control method for cold cathode lamps, which is a dimming technology suitable for multiple lamps and can light up the lamps The ratio of the duty ratio between the time and the light-off time is reduced, which solves the flicker phenomenon during low-brightness dimming and reduces voltage / current surges. Background technique [0002] In recent years, due to the development of computer-related technologies and market demand, flat-panel displays have gradually replaced traditional cathode ray tube (CRT) computer screens. Currently, the more common flat panel displays include liquid crystal displays and plasma displays. Although plasma technology is suitable for the development of large-size displays, liquid crystal displays still have certain market potential and competitive advantages. As far as the liquid crystal display is concerned...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B41/38
Inventor 冷中明谢邓钦李致亮陈思圣
Owner CHUNTEX ELECTRONICS
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