Method and device for driving display panel

Patent metadata

Field	Value
Publication number	US-11398203-B2
Application number	US-201817043852-A
Country	US
Kind code	B2
Filing date	Nov 28, 2018
Priority date	Nov 12, 2018
Publication date	Jul 26, 2022
Grant date	Jul 26, 2022

Abstract

Provided are a drive device and a drive method for a display panel, the drive method comprising: first, acquiring a first common voltage; next, determining a preset threshold according to the first common voltage; and finally, outputting a second common voltage according to the first common voltage and the preset threshold. By means of the present drive method for the display panel, it is only necessary to adjust one common voltage, and another common voltage will automatically follow on the basis of the preset threshold, thus achieving the goal of fixing a voltage difference.

First claim

What is claimed is:

1. A method for driving a display panel, the method comprising:
acquiring a first common voltage;
performing an analog-to-digital conversion on the first common voltage to obtain a first target voltage;
determining a grade corresponding to an amplitude range of the first target voltage, wherein different grades correspond to different preset voltage thresholds;
determining, according to the grade corresponding to the amplitude range of the first target voltage, a preset voltage threshold corresponding to the first target voltage; and
outputting a second common voltage according to the first common voltage and the preset voltage threshold;
wherein the display panel comprises pixels each of which is divided into a main pixel and a sub-pixel and a voltage difference between both ends of a liquid crystal of the sub-pixel is a difference between the second common voltage and the first common voltage.

2. The method according to claim 1 , wherein before acquiring the first common voltage, the method further comprises:
acquiring identification information about a chip; and
determining the first common voltage according to the identification information about the chip.

3. The method according to claim 2 , wherein the acquiring identification information about the chip refers to acquiring a factory serial number of the chip.

4. The method according to claim 1 , wherein outputting the second common voltage according to the first common voltage and the preset voltage threshold comprises:
acquiring the preset voltage threshold; and
performing data processing on the preset voltage threshold and the first common voltage and outputting the second common voltage.

5. The method according to claim 4 , wherein performing data processing on the preset voltage threshold and the first common voltage and outputting the second common voltage comprises:
performing addition processing on the preset voltage threshold and the first common voltage to obtain a second target voltage; and
outputting the second common voltage after performing a data conversion on the second target voltage.

6. The method according to claim 4 , wherein performing data processing on the preset voltage threshold and the first common voltage and outputting the second common voltage comprises:
performing multiplication processing on the preset voltage threshold and the first common voltage to obtain a second target voltage; and
outputting the second common voltage after performing a data conversion on the second target voltage.

7. The method according to claim 6 , wherein outputting the second common voltage after performing a data conversion on the second target voltage comprises:
performing a digital-to-analog conversion on the second target voltage based on a preset reference voltage, to obtain the second common voltage; and
outputting the second common voltage.

8. A method for driving a display panel, the method comprising:
acquiring identification information about a chip and determining a first common voltage according to the identification information about the chip;
performing an analog-to-digital conversion on the first common voltage to obtain the first target voltage;
determining a grade corresponding to an amplitude range of the first target voltage, wherein different grades correspond to different preset voltage thresholds;
determining, according to the grade corresponding to the amplitude range of the first target voltage, a preset voltage threshold corresponding to the first target voltage; and
outputting a second common voltage according to the first common voltage and the preset voltage threshold;
wherein the display panel comprises pixels each of which is divided into a main pixel and a sub-pixel and a voltage difference between both ends of a liquid crystal of the sub-pixel is a difference between the second common voltage and the first common voltage.

9. The method according to claim 8 , wherein the acquiring identification information about the chip refers to acquiring a factory serial number of the chip.

10. The method according to claim 8 , wherein outputting the second common voltage according to the first common voltage and the preset voltage threshold comprises:
acquiring the preset voltage threshold; and
performing data processing on the preset voltage threshold and the first common voltage and outputting the second common voltage.

11. The method according to claim 10 , wherein performing data processing on the preset voltage threshold and the first common voltage and outputting the second common voltage comprises:
performing addition processing on the preset voltage threshold and the first common voltage to obtain a second target voltage; and
outputting the second common voltage after performing a data conversion on the second target voltage.

12. The method according to claim 11 , wherein outputting the second common voltage after performing a data conversion on the second target voltage comprises:
performing a digital-to-analog conversion on the second target voltage based on a preset reference voltage, to obtain the second common voltage; and
outputting the second common voltage.

13. The method according to claim 10 , wherein performing data processing on the preset voltage threshold and the first common voltage and outputting the second common voltage comprises:
performing multiplication processing on the preset voltage threshold and the first common voltage to obtain a second target voltage; and
outputting the second common voltage after performing a data conversion on the second target voltage.

14. The method according to claim 13 , wherein outputting the second common voltage after performing a data conversion on the second target voltage comprises:
performing a digital-to-analog conversion on the second target voltage based on a preset reference voltage, to obtain the second common voltage; and
outputting the second common voltage.

15. A device for driving a display panel, the device comprising:
an acquisition module configured to acquire a first common voltage;
an analysis module electrically connected to the acquisition module and configured to:
perform an analog-to-digital conversion on the first common voltage to obtain a first target voltage;
determine a grade corresponding to an amplitude range of the first target voltage, wherein different grades correspond to different preset voltage thresholds; and
determine, according to the grade corresponding to the amplitude range of the first target voltage, a preset voltage threshold corresponding to the first target voltage; and

a processing and outputting module electrically connected to the acquisition module and the analysis module respectively and configured to output a second common voltage according to the first common voltage and the preset voltage threshold;
wherein the display panel comprises pixels each of which is divided into a main pixel and a sub-pixel and a voltage difference between both ends of a liquid crystal of the sub-pixel is a difference between the second common voltage and the first common voltage.

16. The device according to claim 15 , wherein the analysis module includes a processor.

17. The device according to claim 15 , wherein the processing and outputting module includes a microcontroller unit.

Assignees

• Hkc Corp Ltd

Inventors

• Wang Mingliang

Classifications

• G09G3/3696 Primary

  Generation of voltages supplied to electrode drivers · CPC title

• G09G3/3655 Primary

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

• G09G3/3648

  using an active matrix (G09G3/367 - G09G3/3696 take precedence) · CPC title

• G09G2300/0828

  forming a digital to analog [D/A] conversion circuit · CPC title