Compensation method and system for public voltage
A common voltage and compensation method technology, which is applied in the common voltage compensation method and system field, can solve the problems of increasing the power consumption of liquid crystal displays, the inability to observe display screen jitter, abnormal grayscale crosstalk of afterimage display, etc.
Inactive Publication Date: 2017-03-29
BOE TECH GRP CO LTD +1
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Problems solved by technology
However, when the liquid crystal display displays certain pictures, such as pictures that are not sensitive to the human eye and pictures that have a small coupling effect of the common voltage, even if the difference between the common voltage on the common electrode line and the reference voltage is greater than or equal to the preset threshold, The human eye cannot observe problems such as jitter, afterimage, abnormal display grayscale, and crosstalk in the display screen. Therefore, it does not have any substantive significance to perform common voltage compensation on these screens, but it will increase the power consumption of the LCD display.
Method used
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example 1
[0046] Example 1: If image 3 As shown, the timing control circuit 201 realizes the control of the common voltage compensation circuit 202 through the switching transistor 203. In the following, the switching transistor 203 is an N-type switching transistor as an example for illustration. The common voltage compensation system realizes the common voltage through the following method Compensation for:
[0047] 1. When the difference between the common voltage on the common electrode line and the reference voltage is greater than or equal to the set first threshold value, the timing control circuit 201 compares the current display screen with the pre-stored setting in the buffer of the timing control circuit 201. special screen for comparison;
[0048] 2. Determine whether the ratio of the difference between the gray scale of more than 25% of the area in the current display screen and the gray scale of the set special screen to the total gray scale is less than 0.5;
[0049] 3...
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The invention discloses a common voltage compensating method and system. According to the compensating method, when the difference between the common voltage of a common electrode line and the reference voltage is larger than or equal to a set first threshold, a currently displayed picture is compared with a set special picture; when the similarity degree of the currently displayed picture and the set special picture meets a preset condition, the common voltage of the common electrode line is compensated; thus, when the difference between the common voltage of the common electrode line and the reference voltage is larger than or equal to the set first threshold, the common voltage of the common electrode line can be compensated only on the premise that the similarity degree of the currently displayed picture and the set special picture meets the preset condition, otherwise, the common voltage of the common electrode line is not compensated, and the power consumption of an LCD (liquid crystal display) is effectively reduced on the premise that the display quality of the LCD is improved through omission of unnecessary compensation.
Description
technical field [0001] The invention relates to the field of display technology, in particular to a method and system for compensating a common voltage. Background technique [0002] In the existing liquid crystal display, because the common voltage applied to the common electrode line by the common voltage generation circuit is easily affected by other voltages, it will rise or fall, which will cause the picture displayed by the liquid crystal display to shake, afterimage, Problems such as abnormal display grayscale and crosstalk affect the display quality of the liquid crystal display. Therefore, a common voltage compensation circuit is generally provided in the liquid crystal display. [0003] In the process of displaying each frame of the liquid crystal display, when the difference between the common voltage on the common electrode line and the reference voltage is greater than or equal to the preset threshold, the common voltage compensation circuit and the common volta...
Claims
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IPC IPC(8): G09G3/36
Inventor 张春兵赖意强张亮
Owner BOE TECH GRP CO LTD