Method for driving display panel, driver circuit for display panel, and display device

Patent metadata

Field	Value
Publication number	US-12451042-B2
Application number	US-202218273784-A
Country	US
Kind code	B2
Filing date	Sep 29, 2022
Priority date	Sep 29, 2022
Publication date	Oct 21, 2025
Grant date	Oct 21, 2025

Abstract

Provided is a method for driving a display panel, including: acquiring gamma correction data of each of the display blocks; for each pixel in the display panel, determining, based on the gamma correction data of a first display block where the pixel is located, a first correction voltage corresponding to a to-be-displayed target gray scale of the pixel; determining, based on the gamma correction data of at least one second display block adjacent to the first display block, at least one second correction voltage corresponding to the target gray scale; determining a gamma voltage of the pixel based on the first correction voltage, the at least one second correction voltage, and a position of the pixel in the display panel; and driving, based on the gamma voltage, the pixel to display the target gray scale.

First claim

What is claimed is:

1. A method for driving a display panel, wherein the display panel comprises a plurality of display blocks; and the method comprises:
acquiring gamma correction data of each of the display blocks, wherein the gamma correction data of the plurality of display blocks is acquired by performing gamma correction on at least one of the plurality of display blocks;
for each pixel in the display panel, determining, based on the gamma correction data of a first display block where the pixel is located, a first correction voltage corresponding to a to-be-displayed target gray scale of the pixel;
determining, based on the gamma correction data of at least one second display block adjacent to the first display block, at least one second correction voltage corresponding to the target gray scale;
determining a gamma voltage of the pixel based on the first correction voltage, the at least one second correction voltage, and a position of the pixel in the display panel; and
driving, based on the gamma voltage, the pixel to display the target gray scale;
wherein determining the gamma voltage of the pixel based on the first correction voltage, the at least one second correction voltage, and the position of the pixel in the display panel comprises:
acquiring a mapping relationship between correction voltages and positions of pixels by processing the first correction voltage, the at least one second correction voltage, a position of a central pixel of the first display block in the display panel, and a position of a central pixel of each second display block in the display panel based on a linear difference algorithm; and
determining the gamma voltage of the pixel based on the position of the pixel in the display panel and the mapping relationship.

2. The method according to claim 1 , wherein the gamma correction data is a voltage correspondence relationship between a gray scale and a gamma voltage; the first correction voltage and the at least one second correction voltage are both gamma voltages corresponding to the target gray scale; and
determining the gamma voltage of the pixel based on the position of the pixel in the display panel and the mapping relationship comprises:
acquiring the gamma voltage of the pixel by substituting the position of the pixel in the display panel into the mapping relationship.

3. The method according to claim 2 , wherein acquiring the gamma correction data of each of the plurality of display blocks comprises:
acquiring a voltage correspondence relationship between the gray scale and the gamma voltage of a target display block in the plurality of display blocks;
acquiring an offset correspondence relationship between the gray scale and a voltage offset of each of other display blocks in the plurality of displaying regions except the target display block, wherein the voltage offset corresponding to any gray scale in the offset correspondence relationship is an offset relative to the gamma voltage corresponding to the gray scale in the voltage correspondence relationship of the target display block; and
for each of the other display blocks, acquiring a voltage correspondence relationship of the display block based on the offset correspondence relationship of the display block and the voltage correspondence relationship of the target display block.

4. The method according to claim 3 , wherein
a storage space occupied by the voltage offset is smaller than a storage space occupied by the gamma voltage.

5. The method according to claim 2 , wherein acquiring the gamma correction data of each of the plurality of display blocks comprises:
acquiring display brightness of each of the plurality of display blocks; and
acquiring the voltage correspondence relationship between the gray scale of the display block and the gamma voltage of each display block by performing gamma correction on the display block based on the display brightness of the display block.

6. The method according to claim 2 , wherein acquiring the gamma correction data of each of the plurality of display blocks comprises:
acquiring a voltage correspondence relationship between the gray scale and the gamma voltage of a reference display block of a plurality of display blocks in a reference panel, and an offset correspondence relationship between the gray scale and a voltage offset of each of remaining display blocks of the plurality of display blocks of the reference panel except the reference display block, wherein the voltage offset corresponding to any gray scale in the offset correspondence relationship of the remaining display block is an offset relative to the gamma voltage corresponding to any gray scale in the voltage correspondence relationship of the reference display block;
acquiring display brightness of the target display block among the plurality of display blocks in the display panel, wherein the plurality of display blocks of the reference panel correspond to the plurality of display blocks of the display panel in a one-to-one manner;
acquiring the voltage correspondence relationship between the gray scale and the gamma voltage of the target display block by performing gamma correction on the target display block based on the display brightness of target display block; and
for each of other display blocks in the display panel except the target display block, determining the voltage correspondence relationship of the display block based on the voltage correspondence relationship of the target display block and the offset correspondence relationship of the remaining display block corresponding to the display block.

7. The method according to claim 1 , wherein the gamma correction data of a target display block in the plurality of display blocks is a voltage correspondence relationship between a gray scale and a gamma voltage, and an offset correspondence relationship between a gray scale and a voltage offset; the gamma correction data of each of other display blocks in the plurality of display blocks except the target display block is an offset correspondence between a gray scale and a voltage offset; and the voltage offset corresponding to any gray scale in the offset correspondence relationship is an offset relative to the gamma voltage corresponding to any gray scale in the voltage correspondence relationship of the target display block;
the first correction voltage and the at least one second correction voltage are both voltage offsets corresponding to the target gray scale; and
determining the gamma voltage of the pixel based on the position of the pixel in the display panel and the mapping relationship comprises:
acquiring a voltage offset of the pixel by substituting the position of the pixel in the display panel into the mapping relationship; and
determining the gamma voltage of the pixel based on the voltage offset of the pixel and the gamma voltage corresponding to the target gray scale in the voltage correspondence relationship.

8. The method according to claim 1 , wherein the plurality of display blocks are arranged in an array.

9. The method according to claim 1 , wherein a display device to which the display panel belongs comprises a plurality of source driver circuits;
the plurality of display blocks are arranged in a pixel row direction of the display panel, and each of the display blocks corresponds to at least one source driver circuit and is connected to the corresponding at least one source driver circuit.

10. The method according to claim 9 , wherein a quantity of the at least one second display block is 1; and prior to determining at least one second correction voltage corresponding to the target gray scale based on the gamma correction data of the at least one second d

Assignees

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

Inventors

• Chen Peng
• Xu Zhicai
• Liu Shaoning
• Yang Jie
• Li Suncun
• Li Shiming
• Shen Lixia
• Lee Eunho

Classifications

• G09G2320/0686

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

• G09G2320/0276

  for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction · CPC title

• G09G2320/0233

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

• G09G3/2092

  Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto (suitable for both CRT and flat panel G09G5/003; specific for a CRT G09G1/165) · CPC title

• G09G3/32

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