Grayscale calibrating method for display panel and display device

Patent metadata

Field	Value
Publication number	US-12488725-B2
Application number	US-202318552560-A
Country	US
Kind code	B2
Filing date	May 16, 2023
Priority date	Apr 27, 2023
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

The present application provides a grayscale calibrating method for a display panel and a display device. The grayscale calibrating method for a display panel includes obtaining a screen image to be displayed of the display panel, and determining whether the screen image to be displayed exists in an abnormal display region; when the screen image to be displayed exits in the abnormal display region, increasing the grayscale of each of the first sub-pixels located in the first display region by changing a white balance component to improve the display effect of the abnormal display region.

First claim

What is claimed is:

1 . A grayscale calibrating method for a display panel, wherein the display panel comprises data lines and first sub-pixels and second sub-pixels that are connected to each of the data lines, a color of the first sub-pixel is different from a color of the second sub-pixel, and the data line is configured to sequentially transmit data voltages to the first sub-pixels and the second sub-pixels;
wherein the grayscale calibrating method for a display panel comprises: obtaining a screen image to be displayed of the display panel, and determining whether an abnormal display region exists in the screen image to be displayed, wherein the abnormal display region comprises a first display region and a second display region adjacent to each other, a grayscale of each of the first sub-pixels located in the first display region is less than or equal to a predetermined grayscale, the grayscale of each of the first sub-pixels located in the second display region is greater than the grayscale of each of the first sub-pixels located in the first display region, and the predetermined grayscale ranges from 0 grayscale to 10 grayscale; and when the screen image to be displayed exists in the abnormal display region, increasing the grayscale of each of the first sub-pixels located in the first display region by changing a white balance component to improve a display effect of the abnormal display region; wherein a grayscale of each of the second sub-pixels located in the first display region and the second display region are within a predetermined grayscale range, the predetermined grayscale is less than a minimum grayscale of the predetermined grayscale range; wherein the predetermined grayscale is 0 grayscale, in the second display region, the grayscales of the first sub-pixels are greater than or equal to 1, and the grayscale of the first sub-pixels gradually increase.

2 . The grayscale calibrating method according to claim 1 , wherein the step of increasing the grayscale of each of the first sub-pixels located in the first display region by changing a white balance component comprises:
obtaining an initial white balance data table of the display panel; and according to the color and the grayscale of each of the first sub-pixels located in the first display region, increasing a white balance component of the color corresponding to the grayscale in the initial white balance data table.

3 . The grayscale calibrating method for a display panel according to claim 2 , wherein the predetermined grayscale is 0 grayscale, the step of increasing a white balance component of the color corresponding to the grayscale in the initial white balance data table comprises:
increasing a white balance component of the color corresponding to the 0 grayscale in the initial white balance data table such that the an increase corresponding to 0 grayscale is from 1 to 20 grayscale.

4 . The grayscale calibrating method for a display panel according to claim 1 , wherein the predetermined grayscale is 0 grayscale, and the screen image to be displayed is a yellow screen image, green screen image, orange screen image, or blue screen image.

5 . The grayscale calibrating method for a display panel according to claim 1 , wherein the first sub-pixel comprises a first side and a second side intersecting each other, a length of the first side is greater than a length of the second side, and an extension direction of the data line is parallel to the second side.

6 . The grayscale calibrating method for a display panel according to claim 5 , wherein the display panel further comprises third sub-pixels connected to the data line, colors of the first sub-pixels, the second sub-pixels, and the third sub-pixels are different, the data line is configured to sequentially transmit data voltages to the first sub-pixels, the second sub-pixels and the third sub-pixels;
the first sub-pixels are blue sub-pixels, the second sub-pixels are green sub-pixels, and the third sub-pixels are red sub-pixels, in a same column of the first, second, and sub-pixels, the blue sub-pixel, the green sub-pixel and the red sub-pixel are arranged sequentially and repeatedly, and colors of the first, second, and third sub-pixels in the same columns are the same.

7 . A grayscale calibrating method for a display panel, wherein the display panel comprises data lines and first sub-pixels and second sub-pixels that are connected to each of the data lines, a color of the first sub-pixel is different from a color of the second sub-pixel, and the data line is configured to sequentially transmit data voltages to the first sub-pixels and the second sub-pixels;
wherein the grayscale calibrating method for a display panel comprises: obtaining a screen image to be displayed of the display panel, and determining whether an abnormal display region exists in the screen image to be displayed, wherein the abnormal display region comprises a first display region and a second display region adjacent to each other, the grayscale of each of the first sub-pixels located in the first display region is less than or equal to a predetermined grayscale, and the grayscale of each of the first sub-pixels located in the second display region is greater than the grayscale of each of the first sub-pixels located in the first display region; and when the screen image to be displayed exists in the abnormal display region, increasing the grayscale of each of the first sub-pixels located in the first display region by changing a white balance component to improve a display effect of the abnormal display region; wherein the predetermined grayscale is 0 grayscale, in the second display region, the grayscales of the first sub-pixels are greater than or equal to 1, and the grayscale of the first sub-pixels gradually increase.

8 . The grayscale calibrating method according to claim 7 , wherein the step of increasing the grayscale of each of the first sub-pixels located in the first display region by changing a white balance component comprises:
obtaining an initial white balance data table of the display panel; and according to the color and the grayscale of each of the first sub-pixels located in the first display region, increasing a white balance component of the color corresponding to the grayscale in the initial white balance data table.

9 . The grayscale calibrating method for a display panel according to claim 8 , wherein the predetermined grayscale is 0 grayscale, the step of increasing a white balance component of the color corresponding to the grayscale in the initial white balance data table comprises:
increasing a white balance component of the color corresponding to the 0 grayscale in the initial white balance data table such that the an increase corresponding to 0 grayscale is from 1 to 20 grayscale.

10 . The grayscale calibrating method for a display panel according to claim 7 , wherein the predetermined grayscale ranges from 0 grayscale to 10 grayscale.

11 . The grayscale calibrating method for a display panel according to claim 10 , wherein the predetermined grayscale is 0 grayscale, and the screen image to be displayed is a yellow screen image, green screen image, orange screen image, or blue screen image.

12 . A grayscale calibrating method for a display panel, wherein the display panel comprises data lines and first sub-pixels and second sub-pixels that are connected to each of the data lines, a color of the first sub-pixel is different from a color of the second sub-pixel, and the data line is configured to sequentially transmit data voltages to the first sub-pixels and the second sub-pixels;
wherein the grayscale calibrating method for

Assignees

• Huizhou China Star Optoelectronics Display Co Ltd
• Tcl China Star Optoelectronics Tech Co Ltd

Inventors

• Hai Bo

Classifications

• G09G2360/16

  Calculation or use of calculated indices related to luminance levels in display data · CPC title

• G09G2320/0693

  Calibration of display systems · CPC title

• G09G2320/0686

  with two or more screen areas displaying information with different brightness or colours · CPC title

• G09G2320/0673

  for control of gamma adjustment, e.g. selecting another gamma curve · CPC title

• G09G2320/0666

  for control of colour parameters, e.g. colour temperature · CPC title