Method and apparatus for compensating for brightness of display panel, display device, and storage medium

Patent metadata

Field	Value
Publication number	US-12223875-B2
Application number	US-202218028358-A
Country	US
Kind code	B2
Filing date	Apr 28, 2022
Priority date	Apr 28, 2022
Publication date	Feb 11, 2025
Grant date	Feb 11, 2025

Abstract

The present application discloses a method and an apparatus for compensating for brightness of a display panel, a display device, and a storage medium, and belongs to the field of display technologies. The method comprises: acquiring a brightness value of the display panel; acquiring, based on the brightness value of the display panel, a compensation function corresponding to the brightness value, and compensation parameters of the compensation function; and compensating for the brightness of the display panel by using the compensation function corresponding to the brightness value, the a degree at which the brightness of the image to be displayed by the display panel is compensated is negatively correlated with the brightness value of the display panel.

First claim

What is claimed is:

1. A method for compensating for brightness of a display panel, comprising:
acquiring a brightness value of the display panel;
acquiring, based on the brightness value of the display panel, a compensation function corresponding to the brightness value, and compensation parameters of the compensation function; and
compensating for brightness of an image to be displayed by the display panel by using the compensation function corresponding to the brightness value;
wherein a degree at which the brightness of the image to be displayed by the display panel is compensated is negatively correlated with the brightness value of the display panel,
wherein acquiring, based on the brightness value of the display panel, the compensation function corresponding to the brightness value, and the compensation parameters of the compensation function comprises:
acquiring the compensation function corresponding to the brightness value, based on the brightness value of the display panel and a first corresponding relationship between brightness values of the display panel and compensation functions; and
acquiring the compensation parameters of the compensation function corresponding to the brightness value, based on the brightness value of the display panel and a second corresponding relationship between the brightness values of the display panel and groups of compensation parameters,
wherein compensating for the brightness of the image to be displayed by the display panel by using the compensation function corresponding to the brightness value comprises:
compensating for the brightness of the image to be displayed by the display panel by using a first compensation function, after the brightness value of the display panel is determined to be within a first brightness range based on the brightness value of the display panel; and
compensating for the brightness of the image to be displayed by the display panel by using a second compensation function, after the brightness value of the display panel is determined to be within a second brightness range based on the brightness value of the display panel,
wherein the first corresponding relationship comprises: a corresponding relationship between the first brightness range and the first compensation function, and a corresponding relationship between the second brightness range and the second compensation function; and
a lower limit value of the first brightness range is greater than an upper limit value of the second brightness range, and a degree at which the brightness of the image to be displayed by the display panel is compensated by using the first compensation function is smaller than a degree at which the brightness of the image to be displayed by the display panel is compensated by using the second compensation function.

2. The method according to claim 1 , wherein the first compensation function is:

Y
=

Gain
*
X
*

G

′

+

Offset
*

O

′

;

wherein Y is a grayscale of the image after the brightness of the image is compensated; X is a grayscale of the image before the brightness of the image is compensated; each of Gain, Offset, G′ and O′ is one of compensation parameters of the first compensation function.

3. The method according to claim 1 , wherein the second compensation function is:

Y
=

Beta
*
X
⁢
2
*

B

′

+

Gain
*
X
*

G

′

+

Offset
*

O

′

;

wherein Y is a grayscale of the image after the brightness of the image is compensated; X is a grayscale of the image before the brightness of the image is compensated; each of Beta, Gain, Offset, B′, G′ and O′ is one of compensation parameters of the second compensation function.

4. The method according to claim 1 , wherein compensating for the brightness of the image to be displayed by the display panel by using the compensation function corresponding to the brightness value further comprises:
compensating for the brightness of the image to be displayed by the display panel by using a third compensation function, after the brightness value of the display panel is determined to be within a third brightness range based on the brightness value of the display panel;
wherein the first corresponding relationship further comprises: a corresponding relationship between the third brightness range and the third compensation function, and an upper limit value of the third brightness range is smaller than an upper limit value of the first brightness range, and greater than the upper limit value of the second brightness range.

5. The method according to claim 4 , wherein the third compensation function is:

Y
=

Beta
*

X

2

+

Gain
*

Assignees

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

Inventors

• Li Zewen
• Liang Hengzhen
• Liu Lianbin
• Niu Wenxiao
• Xiao Can
• Deng Yingjun

Classifications

• G09G2320/0233

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

• G09G3/3208

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

• G09G3/34

  by control of light from an independent source · CPC title

• G09G3/20

  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

• G09G3/2007 Primary

  Display of intermediate tones · CPC title