Compensation value generation method, apparatus thereof, and display panel thereof

Patent metadata

Field	Value
Publication number	US-12562092-B2
Application number	US-202318401524-A
Country	US
Kind code	B2
Filing date	Dec 31, 2023
Priority date	Dec 8, 2023
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

The present invention provides a compensation value generation method, an apparatus thereof, and a display panel thereof. The method includes: obtaining at least one optical message of a display panel under at least one tie point grayscale, and determining whether color cast exists the display panel under the tie point grayscale according to optical message, when color cast exists, adopting a first compensation method to compensate the tie point grayscale to obtain a first compensation value, when no color cast exists, then adopting a second compensation method to compensate the tie point grayscale to obtain a second compensation value. Also, a data amount of the second compensation value is different from a data amount of the first compensation value to mitigate the color cast of the display image while lowering the storage cost.

First claim

What is claimed is:

1 . A compensation value generation method for generating a compensation value applied to a display panel, wherein the display panel comprises a display panel main body, a memory configured to store a compensation value, and a controller configured to drive the display panel main body to emit light according to the compensation value, and the method is implemented by the display panel main body, the memory, and the controller of the display panel and comprises:
obtaining at least one optical message of the display panel under at least one tie point grayscale from the display panel, wherein the at least one tie point grayscale corresponding to the at least one optical message; determining whether color cast exists in the display panel under the tie point grayscale according to the optical message; when the color cast exits in the display panel under the tie point grayscale, adopting a first compensation method to compensate the tie point grayscale to obtain a first compensation value; and when no color cast exists in the display panel under the tie point grayscale, adopting a second compensation method to compensate the tie point grayscale to obtain a second compensation value, a data amount of the second compensation value is different from a data amount of the first compensation value; wherein the compensation value comprises at least one of the first compensation value and the second compensation value; wherein the optical message is a light emitting brightness value of one of a plurality of pixel units of the display panel.

2 . The compensation value generation method according to claim 1 , wherein each of the pixel units at least comprises a first sub-pixel and a second sub-pixel in different colors, the optical message comprises a first optical message corresponding to the first sub-pixel and a second optical message corresponding to the second sub-pixel; and
the step of adopting a first compensation method to compensate the tie point grayscale to obtain a first compensation value, comprises: obtaining a reference color cast message, determining a first sub-compensation value of the first sub-pixel under the tie point grayscale and a second sub-compensation value of the second sub-pixel under the tie point grayscale according to the first optical message, the second optical message, and the reference color cast message, wherein the first compensation value comprises the first sub-compensation value and the second sub-compensation value.

3 . The compensation value generation method according to claim 2 , wherein the step of adopting a second compensation method to compensate the tie point grayscale to obtain a second compensation value, comprises:
obtaining a reference brightness message, and according to the first optical message, the second optical message, and the reference brightness message, determining the same second compensation value of the first sub-pixel and the second sub-pixel under the tie point grayscale.

4 . The compensation value generation method according to claim 2 , wherein the step of determining whether color cast exists in the display panel under the tie point grayscale according to the optical message, comprises:
generating an actual color cast message according to the first optical message and the second optical message; and obtaining the reference color cast message, and determining whether color cast exists in the display panel under the tie point grayscale according to the actual color cast message and the reference color cast message.

5 . The compensation value generation method according to claim 2 , wherein the step of obtaining at least one optical message of the display panel under at least one tie point grayscale, comprises:
dividing the display panel in a plurality of regions; and obtaining at least one first sub-optical message of the first sub-pixel in each of the regions under the at least one tie point grayscale, and obtaining at least one second sub-optical message of the second sub-pixel in each of the regions under the at least one tie point grayscale, wherein the first optical message comprises the at least one first sub-optical message or the first optical message is determined according to the at least one first sub-optical message, and the second optical message comprises the at least one second sub-optical message or the second optical message is determined according to the at least one second sub-optical message.

6 . The compensation value generation method according to claim 5 , wherein the step of determining whether color cast exists in the display panel under the tie point grayscale according to the optical message, comprises:
generating an actual sub-color cast message correspondingly according to the first sub-optical message and a corresponding one of the at least one second sub-optical message; and obtaining the reference color cast message, and determining whether color cast exists in a corresponding one of the regions under the tie point grayscale according to the actual sub-color cast message and the reference color cast message to determine whether color cast exists in the display panel under the tie point grayscale.

7 . The compensation value generation method according to claim 1 , wherein a quantity of the compensation value is greater than 1, a plurality of the compensation value comprises a plurality of tie point compensation values corresponding to a plurality of the tie point grayscales, after obtaining at least one of the at least one first compensation value and the at least one second compensation value as the tie point compensation values, the method further comprises:
according to two of the tie point compensation values corresponding to adjacent two of the tie point grayscales, calculating a third compensation value corresponding to a non-tie point grayscale between adjacent two of the tie point grayscales, and the compensation value further comprises the third compensation value.

8 . The compensation value generation method according to claim 1 , wherein after at least one of the step of adopting a first compensation method to compensate the tie point grayscale to obtain a first compensation value and the step of adopting a second compensation method to compensate the tie point grayscale to obtain a second compensation value, the method further comprises:
generating a compensation table comprising a first format according to the first compensation values, the second compensation values, or the at least one first compensation value, and the at least one second compensation value; and generating compensation data comprising a second format according to the compensation table, wherein the compensation data comprises the compensation values and compensation values type data corresponding to the compensation values, the compensation values are constituted by the first compensation values or the second compensation values, or the compensation values are constituted by the at least one first compensation value and the at least one second compensation value, each of the compensation value type data is configured to indicate a corresponding one of the compensation values as the first compensation value or the second compensation value.

9 . The compensation value generation method according to claim 1 , wherein
the display panel comprises a plurality of pixel units, each of the pixel units at least comprises a first sub-pixel and a second sub-pixel in different colors, the optical message comprises a first optical message corresponding to the first sub-pixel and a second optical message corresponding to the second sub-pixel; and the step of adopting a first compensation method to compensate the tie point grayscale to o

Assignees

• Tcl China Star Optoelectronics Tech Co Ltd

Inventors

• Ning Fan

Classifications

• G09G2320/0666

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

• G09G2320/0626

  for control of overall brightness · CPC title

• G09G2320/0233

  Improving the luminance or brightness uniformity across the screen · CPC title

• G09G2300/0452

  Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components · CPC title

• G09G3/2003 Primary

  Display of colours (specific for liquid crystal displays G09G3/3607) · CPC title