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Common voltage compensation circuit and method for display panel and display device

A common voltage, display panel technology, applied in static indicators, instruments, etc., can solve the problems of deviation of liquid crystal molecules deflection direction and preset direction, reducing display effect and product yield, serious common voltage coupling, etc., to reduce the picture. Flicker problem, save components, eliminate the effect of screen flicker

Active Publication Date: 2021-03-26
KUSN INFOVISION OPTOELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, since the common electrodes are routed from both sides of the display, when the TFT-LCD displays images, the common voltage on the common electrodes will fluctuate due to the influence of the length and impedance of the traces, making the common voltage The coupling is serious, which leads to the deviation between the deflection direction of the liquid crystal molecules and the preset direction, which makes the display screen flicker, etc., which reduces the display effect and product yield.

Method used

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  • Common voltage compensation circuit and method for display panel and display device
  • Common voltage compensation circuit and method for display panel and display device
  • Common voltage compensation circuit and method for display panel and display device

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[0025] Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. In the various figures, identical elements are indicated with similar reference numerals. For the sake of clarity, various parts in the drawings have not been drawn to scale. Also, some well-known parts may not be shown. For the sake of simplicity, the semiconductor structure obtained after several steps can be described in one figure.

[0026] It should be understood that when describing the structure of a device, when a layer or a region is referred to as being "on" or "over" another layer or another region, it may mean being directly on another layer or another region, or Other layers or regions are also included between it and another layer or another region. Also, if the device is turned over, the layer, one region, will be "below" or "beneath" the other layer, or region.

[0027] If it is to describe the situation directly on another layer or anothe...

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Abstract

The invention discloses a common voltage compensation circuit and method for a display panel and a display device. The compensation circuit comprises a trigger module connected with a display panel and used for comparing the amplitude of a second voltage in the display panel with a preset threshold value, wherein the second voltage is the voltage obtained after the first voltage deflects in the display panel, and the first voltage is an initial common voltage; a compensation module connected with the trigger module and the display panel and generating third voltage according to the first voltage and the second voltage when the second voltage is larger than a preset threshold value, wherein the third voltage is compensation voltage, and fourth voltage is generated under the action of an electric field before the third voltage enters a display area, and the fourth voltage and the third voltage have the same period and opposite phases. According to the common voltage compensation method,the third voltage is generated through the offset of the second voltage and used for compensating for the second voltage, so that the relatively stable fifth voltage is obtained, and the problem of picture flickering is solved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a common voltage compensation circuit for a display panel, a compensation method and a display device. Background technique [0002] Displays, such as TFT-LCD, as a display device, are more and more used in the field of high-performance displays because of their small size, low power consumption / no radiation, and relatively low manufacturing costs. [0003] The TFT-LCD is provided with a common electrode and a pixel electrode, and the liquid crystal molecules are controlled to deflect by an electric field formed by the common electrode and the pixel electrode, so as to achieve the purpose of displaying different grayscale images. However, in the prior art, since the common electrodes are routed from both sides of the display, when the TFT-LCD displays images, the common voltage on the common electrodes will fluctuate due to the influence of the length and impedance of the traces...

Claims

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Application Information

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IPC IPC(8): G09G3/36
CPCG09G3/3648G09G2300/0421G09G2320/02
Inventor 魏玉娜朱梅芬徐福根沈振天
Owner KUSN INFOVISION OPTOELECTRONICS
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