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Method for improving charging of liquid crystal panel and circuit thereof

A liquid crystal panel and circuit technology, which is applied in the driving field of liquid crystal panels, can solve the problems of affecting the performance of liquid crystal panels, increasing the space occupied by SDRAM, and increasing the cost of liquid crystal panels, so as to improve the response time of liquid crystals, realize costs, and change the TFT charging current. Effect

Inactive Publication Date: 2012-03-07
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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Problems solved by technology

The defects of the existing overdrive voltage adjustment scheme mainly lie in: on the one hand, the overdrive voltmeter will increase the space occupied by the SDRAM, thereby increasing the cost of the LCD panel; on the other hand, if the overdrive voltmeter is not detailed enough, The overdrive voltmeter cannot completely cover the full temperature range, resulting in loopholes and affecting the performance of the LCD panel

Method used

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  • Method for improving charging of liquid crystal panel and circuit thereof
  • Method for improving charging of liquid crystal panel and circuit thereof

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Embodiment Construction

[0016] Below in conjunction with the best embodiment shown in the accompanying drawings, it will be further described in detail.

[0017] In the method for improving the charging of the liquid crystal panel of the present invention, corresponding to at least one setting position of the liquid crystal panel, a temperature compensation overdrive voltage adjustment unit is provided, which includes a temperature sensor, a reference voltage generator and a voltage regulator, for A reference voltage is generated in real time based on the temperature measured by the temperature sensor, and the level of VGH driving the gate of the TFT-LCD screen is automatically adjusted according to the reference voltage.

[0018] Preferably, a temperature compensation overdrive voltage adjustment unit is respectively provided for different positions of the liquid crystal panel to improve charging at different positions of the liquid crystal panel, thereby effectively avoiding insufficient charging ca...

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Abstract

The invention provides a method for improving charging of a liquid crystal panel and a circuit thereof. The circuit comprises at least a temperature compensating over driver voltage adjusting unit. Each over driver voltage adjusting unit comprises the following parts: a temperature sensor used for detecting a temperature of a liquid crystal panel and outputting a numeric value representing the temperature; a reference voltage generator used for obtaining corresponding reference voltage according to the numeric value representing the temperature; a voltage regulator used for adjusting a level of output high voltage of a driving TFT-LCD screen grid according to the reference voltage. According to the method and the circuit in the invention, reducing cost of the liquid crystal panel and raising performance of the liquid crystal panel are realized.

Description

technical field [0001] The invention relates to the driving of a liquid crystal panel, in particular to a method and a circuit for adjusting an overdrive (over driver) voltage of the liquid crystal panel. Background technique [0002] As the temperature of the liquid crystal panel increases / decreases, the viscosity coefficient of the liquid crystal also changes, and its equivalent capacitance also changes accordingly, which will cause its response time to change. In order to improve the liquid crystal response speed problem, there have been many solutions, the most used of which is to change the overdrive (Over driver OD) voltage, and store several sets of overdrive voltmeters, so as to adjust the temperature according to different liquid crystal panel temperatures and other conditions. Look up the table to get the corresponding overdrive voltage countermeasures. The defects of the existing overdrive voltage adjustment scheme mainly lie in: on the one hand, the overdrive vo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCG09G3/3648G09G2320/0252G09G2320/041
Inventor 赵登霞吴宇
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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