Common voltage adjustment system and method thereof

A technology of common voltage and adjustment system, applied in static indicators, instruments, etc., can solve the problem of high cost

Inactive Publication Date: 2008-07-16
HIMAX TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention provides a common voltage adjustment system and its adjustment method, which can effectively improve the traditional common voltage adjustment system that needs to use human eyes to judge the flickering of the display screen and cause it to use a lot of manpower. high cost problem

Method used

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  • Common voltage adjustment system and method thereof
  • Common voltage adjustment system and method thereof
  • Common voltage adjustment system and method thereof

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Embodiment Construction

[0037] In the public voltage adjustment system of the present invention, a luminance meter is set to sense the brightness of the display screen of the liquid crystal display panel driven by the pixel voltage of a fixed pattern (a pattern that will cause severe flickering), so as to judge the display screen of the liquid crystal display panel. Flashing situation. According to experience, the flickering of the display screen of the liquid crystal display panel is proportional to the brightness fluctuation of the display screen of the liquid crystal display panel. The common voltage adjustment system of the present invention converts the sensing result into a control signal to adjust the magnitude of the common voltage. The above operations are repeated until the luminance meter detects that the brightness fluctuation of the display screen of the liquid crystal display panel is the minimum value, and the common voltage adjustment system sets and stores the current common voltage ...

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Abstract

A public voltage adjusting system is applied to a liquid crystal display panel; wherein, the invention includes a first brightness meter, a control device and a public voltage lifting control unit. The first brightness meter is used for detecting the brightness of the liquid crystal display panel and outputting a sensing voltage signal according to the brightness. The control device is used for receiving the sensing voltage signal and generates a first brightness extent value and a control signal corresponding to the first brightness extent value according to the sensing voltage signal. The public voltage lifting control unit is used for receiving the control signal and adjusting the public voltage of the liquid crystal display panel according to the control signal.

Description

technical field [0001] The present invention relates to a public voltage regulation system, and in particular to a public voltage regulation device which can automatically correct the public voltage according to the flickering situation of the display screen of the liquid crystal display panel. Background technique [0002] The Feed Through effect means that the voltage level of the pixel electrode in the liquid crystal display is affected by the parasitic capacitance or storage capacitance on the thin film transistor (Thin Film Transistor, TFT) substrate, resulting in some offsets. The offset is Feed through voltage. At this time, the common voltage (Common Voltage, VCOM) of the liquid crystal display needs to be corrected corresponding to the feed-through voltage, so as to avoid the common voltage from deviating from the middle value of the positive polarity pixel voltage and the negative polarity pixel voltage of the liquid crystal display panel , causing the display scr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/133G09G3/36G09G3/20
Inventor 杨宇助刘仁杰
Owner HIMAX TECH LTD
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