Grayscale compensation method, apparatus and system, display driving method, apparatus and system, and chip and medium

Patent metadata

Field	Value
Publication number	US-12586505-B2
Application number	US-202418994839-A
Country	US
Kind code	B2
Filing date	May 20, 2024
Priority date	Jun 25, 2023
Publication date	Mar 24, 2026
Grant date	Mar 24, 2026

Abstract

A grayscale compensating method, a displaying driving method, an apparatus, a system, a chip and a medium. The grayscale compensating method includes: determining compensation coefficients corresponding to a plurality of sub-pixels in a display panel, wherein the compensation coefficients are for characterizing the compensation modes and the compensation magnitudes of brightness compensations to the sub-pixels, wherein the compensation modes include the mode of increasing the brightness and the mode of reducing the brightness; based on the compensation coefficients and to-be-displayed grayscale values corresponding to the sub-pixels, determining correction coefficients corresponding to the plurality of sub-pixels, wherein unequal to-be-displayed grayscale values correspond to unequal correction coefficients, and the correction coefficients are for correcting the compensation magnitudes; and based on the compensation coefficients and the correction coefficients, compensating for the to-be-displayed grayscale values of the plurality of sub-pixels, to reduce the difference in the emitted-light brightnesses of the plurality of sub-pixels.

First claim

The invention claimed is:

1 . A grayscale compensating method, wherein the method comprises:
determining compensation coefficients corresponding to a plurality of sub-pixels in a display panel, wherein the compensation coefficients are for characterizing compensation modes and compensation magnitudes of brightness compensations to the sub-pixels, wherein the compensation modes include a mode of increasing a brightness and a mode of reducing a brightness; based on to-be-displayed grayscale values corresponding to the sub-pixels and the compensation coefficients, determining correction coefficients corresponding to the sub-pixels, wherein unequal instances of the to-be-displayed grayscale values correspond to unequal instances of the correction coefficients, and the correction coefficients are for correcting the compensation magnitudes; and based on the compensation coefficients and the correction coefficients, compensating for the to-be-displayed grayscale values of the plurality of sub-pixels, to reduce a difference in emitted-light brightnesses of the plurality of sub-pixels, wherein based on the compensation coefficients corresponding to the plurality of sub-pixels, delimiting the display panel into a first displaying region block and a second displaying region block, wherein the compensation coefficients in the first displaying region block are greater than 0, and the compensation coefficients in the second displaying region block are less than 0; wherein the correction coefficients corresponding to the sub-pixels within the first displaying region block are the preset value for maintaining the compensation magnitudes; and the correction coefficients corresponding to the sub-pixels within the second displaying region block are the correction coefficients that are determined based on the compensation coefficients and the to-be-displayed grayscale values by using a target condition as the constraint.

2 . The grayscale compensating method according to claim 1 , wherein the step of, based on the to-be-displayed grayscale values corresponding to the sub-pixels and the compensation coefficients, determining the correction coefficients corresponding to the sub-pixels comprises: for the sub-pixels the compensation coefficients of which are less than 0, based on the compensation coefficients and the to-be-displayed grayscale values, by using the target condition as the constraint, determining the correction coefficients; and for the sub-pixels the compensation coefficients of which are greater than 0, determining the correction coefficients to be the preset value for maintaining the compensation magnitudes; wherein the target condition is that post-compensation grayscale values of the sub-pixels are not 0.

3 . The grayscale compensating method according to claim 1 , wherein the display panel comprises a first displaying region block and a second displaying region block, the compensation coefficients corresponding to the sub-pixels within the first displaying region block are greater than 0, and the compensation coefficients corresponding to the sub-pixels within the second displaying region block are less than 0; and
the step of, based on the to-be-displayed grayscale values corresponding to the sub-pixels and the compensation coefficients, determining the correction coefficients corresponding to the sub-pixels comprises: for the sub-pixels within the first displaying region block, determining preset correction coefficients corresponding to the to-be-displayed grayscale values in a first preset table to be first correction coefficients corresponding to the sub-pixels within the first displaying region block; and for the sub-pixels within the second displaying region block, determining preset correction coefficients corresponding to the to-be-displayed grayscale values in a second preset table to be second correction coefficients corresponding to the sub-pixels within the second displaying region block.

4 . The grayscale compensating method according to claim 3 , wherein the first correction coefficients are greater than the second correction coefficients.

5 . The grayscale compensating method according to claim 3 , wherein the preset correction coefficients are acquired by using the following steps: acquiring a testing grayscale value corresponding to the display panel; and by using the target condition as the constraint, based on the testing grayscale value and an coefficient range of the compensation coefficients of the sub-pixels within the displaying region blocks, determining correction coefficients corresponding to the displaying region blocks with the testing grayscale value; wherein the target condition is that, if the to-be-displayed grayscale values are the testing grayscale value, within the displaying region blocks no sub-pixel exists the post-compensation grayscale value of which is 0.

6 . The grayscale compensating method according to claim 5 , wherein the step of, by using the target condition as the constraint, based on the testing grayscale value and the coefficient range of the compensation coefficients of the sub-pixels within the displaying region blocks, determining the correction coefficients corresponding to the displaying region blocks with the testing grayscale value comprises:
determining a target sub-pixel having a lowest instance of the compensation coefficients from the second displaying region block; based on the compensation coefficient corresponding to the target sub-pixel and the testing grayscale value, determining a target correction coefficient corresponding to the target sub-pixel when the target condition is satisfied; determining the target correction coefficient to be a correction coefficient corresponding to the second displaying region block with the testing grayscale value; and based on the target correction coefficient, determining a correction coefficient corresponding to the first displaying region block with the testing grayscale value.

7 . The grayscale compensating method according to claim 6 , wherein the step of, based on the target correction coefficient, determining the correction coefficient corresponding to the first displaying region block with the testing grayscale value comprises:
according to the target correction coefficient, determining an initial correction coefficient corresponding to the first displaying region block with the testing grayscale value; based on the target correction coefficient and the compensation coefficients corresponding to the sub-pixels within the second displaying region block, compensating for the testing grayscale value, to obtain a first preestimated grayscale value corresponding to the sub-pixels within the second displaying region block; based on the initial correction coefficient and the compensation coefficients corresponding to the sub-pixels within the first displaying region block, compensating for the testing grayscale value, to obtain a second preestimated grayscale value corresponding to the sub-pixels within the first displaying region block; acquiring a first actual displaying brightness corresponding to the second displaying region block with the first preestimated grayscale value; acquiring a second actual displaying brightness corresponding to the first displaying region block with the second preestimated grayscale value; and based on a difference between the first actual displaying brightness and the second actual displaying brightness, updating the initial correction coefficient, to cause a displaying brightness of the first displaying region block and a displaying brightness of the second displaying region block to approach a target displaying brightness.

8 . The grayscale compensating method according to claim 7 , wherein the step of

Assignees

• Chengdu Boe Optoelect Tech Co
• Boe Technology Group Co Ltd

Inventors

• Zuo Yini
• Li Shiming
• Lee Eunho
• Qin Jianan

Classifications

• G09G2320/0626

  for control of overall brightness · CPC title

• G09G2320/0233

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

• G09G3/3208 Primary

  organic, e.g. using organic light-emitting diodes [OLED] · CPC title

• G09G3/3258

  with pixel circuitry controlling the voltage across the light-emitting element · CPC title

• G09G3/32

  semiconductive, e.g. using light-emitting diodes [LED] · CPC title