Method and device for compensating common voltage, and display device

Patent metadata

Field	Value
Publication number	US-11404019-B2
Application number	US-201916539798-A
Country	US
Kind code	B2
Filing date	Aug 13, 2019
Priority date	Jan 14, 2019
Publication date	Aug 2, 2022
Grant date	Aug 2, 2022

Abstract

The present disclosure provides a method for compensating a common voltage. The method for compensating a common voltage includes: generating a feedback signal by acquiring a real-time monitoring result of a feedback signal line on the common voltage, the feedback signal including a plurality of time periods, each of the time periods including a first sub-period in which the feedback signal is interfered by the periodic signal and a second sub-period in which the feedback signal is not interfered by the periodic signal; processing the feedback signal to eliminate distortion of the feedback signal caused by interference of the periodic signal in the first sub-period; and compensating for the common voltage according to the feedback signal.

First claim

What is claimed is:

1. A method for compensating a common voltage, which is applied to a display device, the method comprising:
generating a feedback signal by acquiring a real-time monitoring result of a feedback signal line on the common voltage, wherein the feedback signal comprises a plurality of time periods, each of the time periods comprising a first sub-period in which the feedback signal is interfered by a periodic signal and a second sub-period in which the feedback signal is not interfered by the periodic signal;
processing the feedback signal to eliminate distortion of the feedback signal caused by interference of the periodic signal in the first sub-period; and
compensating for the common voltage according to the feedback signal processed, wherein the feedback signal comprises n time periods, where n is a positive integer greater than 1; and wherein processing the feedback signal to eliminate distortion of the feedback signal caused by interference of the periodic signal in the first sub-period further comprises:
in the second sub-period of a j-th period, keeping the feedback signal unchanged, and recording a waveform of the feedback signal in the second sub-period, where 1 in the first sub-period of a (j+1)-th period, according to the waveform recorded in the second sub-period of the j-th period, fitting the waveform of the feedback signal in the first sub-period, and changing the feedback signal to the waveform obtained by the fitting:
wherein the waveform obtained by the fitting in the first sub-period of a (j+1)-th period and the waveform recorded in the second sub-period of the j-th period follow a same waveform function.

2. The method for compensating a common voltage according to claim 1 , wherein processing the feedback signal to eliminate distortion of the feedback signal caused by interference of the periodic signal in the first sub-period comprises: determining a first sub-time period and a second sub-time period according to a timing of the periodic signal.

3. The method for compensating a common voltage according to claim 1 , further comprising a block of setting a time length of the first sub-period, the block comprises:
measuring, for a plurality of times, a duration time length in which the periodic signal interferes the feedback signal to cause the feedback signal to be distorted each time; and
calculating an average value of a plurality of duration time lengths measured, and setting the average value as the time length of the first sub-period.

4. The method for compensating a common voltage according to claim 1 , wherein a time length of the first sub-period ranges from 0.5 μs to 2 μs.

Assignees

• Fuzhou Boe Optoelectronics Tech Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Qiu Xinmao
• Li Zongxiang
• Liao Jiamin
• Wang Jin
• Cheng Hao
• Liu Yao
• Zhou Min
• Tao Wenchang
• Wu Zhendian
• Liu Zuwen
• Hong Guichun
• Zhuang Zihua
• Lv Yaochao
• Shi Changhong
• Lin Linlin
• Zha Wen
• Zhu Jingguang
• Lin Jiantao
• Wu Hongjiang

Classifications

• G09G3/3655 Primary

  Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors · CPC title

• G09G2320/029

  by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel · CPC title

• G09G3/3696 Primary

  Generation of voltages supplied to electrode drivers · CPC title

• G09G2320/0257

  Reduction of after-image effects · CPC title

• G09G2320/0209

  Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display · CPC title