Driving method of display panel and display device including display panel

Patent metadata

Field	Value
Publication number	US-12333987-B2
Application number	US-202318399256-A
Country	US
Kind code	B2
Filing date	Dec 28, 2023
Priority date	Nov 14, 2023
Publication date	Jun 17, 2025
Grant date	Jun 17, 2025

Abstract

A driving method of a display panel includes: obtaining first initial voltage values respectively corresponding to N sub-pixels on a first data line and second initial voltage values respectively corresponding to the N sub-pixels on a second data line in a first initial picture, and third initial voltage values respectively corresponding to 1st to Mth sub-pixels of the N sub-pixels on the first data line and fourth initial voltage values respectively corresponding to the 1st to Mth sub-pixels on the second data line in a second initial picture following the first initial picture; calculating a voltage compensation value for the Mth sub-pixel based on the corresponding first, second, third, and fourth initial voltage value; calculating a target voltage value for the Mth sub-pixel based on the voltage compensation value; and displaying the second initial picture based on the target voltage value.

First claim

What is claimed is:

1. A driving method of a display panel, the display panel comprising a first data line, a second data line adjacent to the first data line, and a sub-pixel column disposed between the first data line and the second data line, the sub-pixel column comprising N sub-pixels,
the driving method comprising:
obtaining first initial voltage values respectively corresponding to the N sub-pixels on the first data line in a first initial picture, second initial voltage values respectively corresponding to the N sub-pixels on the second data line in the first initial picture, third initial voltage values respectively corresponding to 1st to Mth sub-pixels of the N sub-pixels on the first data line in a second initial picture following the first initial picture, and fourth initial voltage values respectively corresponding to the 1st to Mth sub-pixels on the second data line in the second initial picture,
wherein M is less than or equal to N, and both M and N are positive integers;

calculating a voltage compensation value for the Mth sub-pixel based on the first initial voltage value, the second initial voltage value, the third initial voltage value, and the fourth initial voltage value corresponding to the Mth sub-pixel;
calculating a target voltage value for the Mth sub-pixel based on the voltage compensation value; and
displaying the second initial picture based on the target voltage value.

2. The driving method of the display panel according to claim 1 , wherein the obtaining the first initial voltage values, the second initial voltage values, the third initial voltage values, and the fourth initial voltage values comprises:
receiving image data of the first initial picture and the second initial picture;
obtaining first grayscale values respectively corresponding to the N sub-pixels on the first data line in the first initial picture, second grayscale values respectively corresponding to the N sub-pixels on the second data line in the first initial picture, third grayscale values respectively corresponding to the 1st to Mth sub-pixels on the first data line in the second initial picture, and fourth grayscale values respectively corresponding to the 1st to Mth sub-pixels on the second data line in the second initial picture; and
obtaining, based on a preset look up table comprising a correspondence between the grayscale values and the voltage values, the first initial voltage values respectively corresponding to the first grayscale values, the second initial voltage values respectively corresponding to the second grayscale values, the third initial voltage values respectively corresponding to the third grayscale values, and the fourth initial voltage values respectively corresponding to the fourth grayscale values.

3. The driving method of the display panel according to claim 1 , wherein the calculating the voltage compensation value for the Mth sub-pixel comprises:
calculating a capacitive coupling value for the Mth sub-pixel based on the first initial voltage value, the second initial voltage value, the third initial voltage value, and the fourth initial voltage value corresponding to the Mth sub-pixel; and
calculating the voltage compensation value for the Mth sub-pixel based on the capacitive coupling value.

4. The driving method of the display panel according to claim 3 , wherein the calculating the capacitive coupling value for the Mth sub-pixel comprises:
determining whether a polarity of the first initial voltage value is the same as a polarity of the second initial voltage value, and whether a polarity of the third initial voltage value is the same as a polarity of the fourth initial voltage value;
in response to the determination that the polarity of the first initial voltage value is the same as the polarity of the second initial voltage value and the polarity of the third initial voltage value is the same as the polarity of the fourth initial voltage value, calculating a sum of the first initial voltage value, the second initial voltage value, the third initial voltage value, and the fourth initial voltage value; and
determining the sum of the first initial voltage value, the second initial voltage value, the third initial voltage value, and the fourth initial voltage value as the capacitive coupling value for the Mth sub-pixel.

5. The driving method of the display panel according to claim 3 , wherein the calculating the capacitive coupling value for the Mth sub-pixel comprises:
determining whether a polarity of the first initial voltage value is the same as a polarity of the second initial voltage value, and whether a polarity of the third initial voltage value is the same as a polarity of the fourth initial voltage value;
in response to the determination that the polarity of the first initial voltage value is the opposite to the polarity of the second initial voltage value and the polarity of the third initial voltage value is the opposite to the polarity of the fourth initial voltage value, calculating a first voltage difference between the first initial voltage value and the second initial voltage value and a second voltage difference between the third initial voltage value and the fourth initial voltage value; and
calculating a sum of the first voltage difference value and the second voltage difference value, and determining the sum of the first voltage difference value and the second voltage difference value as the capacitive coupling value for the Mth sub-pixel.

6. The driving method of the display panel according to claim 3 , wherein the calculating the voltage compensation value for the Mth sub-pixel based on the capacitive coupling value comprises:
determining whether an absolute value of the capacitive coupling value is greater than or equal to a preset threshold value; and
in response to a determination that the absolute value of the capacitive coupling value is greater than or equal to the preset threshold value, calculating the voltage compensation value for the Mth sub-pixel based on the capacitive coupling value.

7. The driving method of the display panel according to claim 3 , wherein the calculating the voltage compensation value for the Mth sub-pixel based on the capacitive coupling value comprises:
calculating the voltage compensation value according to following formula:
Reg=G coup *Gain/ImageHeight,

wherein Reg represents the voltage compensation value, G coup represents the capacitive coupling value, Gain represents a compensation coefficient, and ImageHeight represents number of pixel rows.

8. The driving method of the display panel according to claim 1 , wherein the calculating the target voltage value for the Mth sub-pixel based on the voltage compensation value comprises:
calculating the target voltage value according to following formula:
V out =V in −Reg,

wherein V out represents the target voltage value, V in represents one of the initial voltage values of the Mth sub-pixel, and Reg represents the voltage compensation value.

9. The driving method of the display panel according to claim 1 , wherein the displaying the second initial picture based on the target voltage value comprises:
obtaining the target voltage value of the Mth sub-pixel; and
obtaining a target grayscale value corresponding to the target voltage value according to a preset look up table comprising a correspondence between grayscale values and the voltage values.

10. A display device comprising a display panel and a drive circuit electrically connected to the display panel, wherein:
the display panel comprises a first data line, a second data line adjacent to the first data line, and a sub-pixel column disposed between the first data line and t

Assignees

• Tcl China Star Optoelectronics Tech Co Ltd

Inventors

• Zhang Yuning
• Chang Shuming
• Wen Yating
• Chen Fan
• Liang Zhaoming
• Zheng Weisheng
• Wang Qian
• Deng Shijie

Classifications

• G09G2320/0233

  Improving the luminance or brightness uniformity across the screen · 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

• G09G3/2074 Primary

  using sub-pixels · CPC title

• G09G3/20 Primary

  for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} · CPC title