Control method and control device for display panel, storage medium, and electronic device

Patent metadata

Field	Value
Publication number	US-12183243-B2
Application number	US-202318131719-A
Country	US
Kind code	B2
Filing date	Apr 6, 2023
Priority date	Dec 28, 2022
Publication date	Dec 31, 2024
Grant date	Dec 31, 2024

Abstract

A display panel control method, a display mode of the display panel including a normal display mode and a partial highlight display mode, the control method including obtaining display information of a display area in the display panel in the partial highlight display mode, the display information including a grayscale displayed corresponding to each pixel, and a number of pixels displaying the corresponding grayscale; determining a target gamma curve based on the display information, a difference between a display brightness corresponding to the grayscale in the target gamma curve and a target display brightness required for the pixels to display the corresponding grayscale in the partial highlight display mode being within a predetermined range; and controlling the pixels in the display area to display based on the target gamma curve.

First claim

What is claimed is:

1. A control method for a display panel, a display mode of the display panel including a normal display mode and a partial highlight display mode, the control method comprising:
in the partial highlight display mode, obtaining display information of a display area in the display panel, the display information including a grayscale corresponding to each pixel to be displayed in a next frame, and a number of pixels to display each corresponding grayscale;
determining a target gamma curve based on the display information including the grayscale corresponding to each pixel to be displayed and the number of pixels to display each corresponding grayscale; and
controlling pixels in the display area to display based on the target gamma curve, wherein a difference between a display brightness corresponding to each grayscale in the determined target gamma curve and a target display brightness required for pixels to display each corresponding grayscale in the partial highlight display mode is within a predetermined range.

2. The control method according to claim 1 , wherein determining the target gamma curve based on the display information includes:
calculating a first grayscale weight coefficient based on the display information, the first grayscale weight coefficient being G APL ,

G

A
⁢
P
⁢
L

=

∑

i
=
1

2
⁢
5
⁢
5

(

k
i

*

i

N
i

)

,

where i indicates a grayscale, k i indicates a grayscale coefficient of the grayscale, and N i indicates the number of pixels displaying the grayscale i in the display area; and
determining the target gamma curve based on the first grayscale weight coefficient.

3. The control method according to claim 2 , wherein determining the target gamma curve based on the first grayscale weight coefficient includes:
pre-storing a plurality of gamma curves in the display panel, the plurality of gamma curves including M highlight gamma curves and a basic gamma curve corresponding to the partial highlight display mode, a display brightness corresponding to a first grayscale in any one of the M highlight gamma curves being greater than a display brightness corresponding to the first grayscale in the basic gamma curve, a display brightness corresponding to a first grayscale of any two highlight gamma curves in the M highlight gamma curves being different, M being a positive integer greater than or equal to 1;
setting a plurality of value ranges based on the plurality of pre-stored gamma curves, a quantity of the value ranges being K, K=M+1, and one value range corresponding to one gamma curve in the plurality of gamma curves; and
based on a value range of the first grayscale weight coefficient, using a gamma curve corresponding to the value range of the first grayscale weight coefficient as the target gamma curve.

4. The control method according to claim 2 , wherein determining the target gamma curve based on the first grayscale weight coefficient includes:
pre-storing the basic gamma curve corresponding to the partial highlight display mode in the display panel; and
determining the target gamma curve based on the first grayscale weight coefficient and the basic gamma curve.

5. The control method according to claim 4 , wherein determining the target gamma curve based on the first grayscale weight coefficient and the basic gamma curve includes:
obtaining the target gamma curve by multiplying a display brightness corresponding to each grayscale on the basic gamma curve by the first grayscale weight coefficient respectively.

6. The control method according to claim 1 , wherein determining the target gamma curve based on the display information includes:
pre-storing a first gamma curve and a second gamma curve in the display panel, a display brightness corresponding to a first grayscale in the first gamma curve being greater than the display brightness corresponding to the first grayscale in the second gamma curve;
obtaining a number of pixels whose grayscale displayed by the pixels in the display area is greater than a preset grayscale;
determining whether the number of pixels is less than a first set threshold;
if the number of pixels is less than the first set threshold, selecting the first gamma curve as the target gamma curve,
if the number of pixels is greater than or equal to the first set threshold, selecting the second gamma curve as the target gamma curve.

7. The control method according to claim 1 , wherein determining the target gamma curve based on the display information includes:
determining a number Y of first display areas of the display panel, a display brightness of the number Y of first display areas being greater than a display brightness of a second display area, the second display area being a display area other than the first display areas in the display panel, a grayscale displayed by pixels in the number Y of first display areas being the same, which is a second grayscale;
determining two first display areas from the number Y of first display areas, a distance between the two determined first display areas being greater than a second set threshold;
randomly selecting one first display area from the two determined first display areas as a target display area;
calculating a first grayscale weight coefficient based on the display information, the first grayscale weight coefficient being G APL ,

G

A
⁢
P
⁢
L

=

∑

i
=
1

2
⁢
5
⁢
5

(

k
i

*

i

N
i

)

,

where i represents a grayscale, k i represents a grayscale coeffi

Assignees

• Xiamen Tianma Display Tech Co Ltd

Inventors

• Zhong Chen
• Lai Meng
• Chen Qiang
• Zhou Jingxiong
• Xia Zhiqiang
• Liu Wenlan
• Li Yinzeng
• Sun Ying
• Fan Liujing

Classifications

• G09G3/2803

  Display of gradations (G09G3/288 takes precedence) · CPC title

• G09G2320/0276

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

• G09G3/3607

  for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels (display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127) · CPC title

• G09G2320/0271

  Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping · CPC title

• G09G2320/0686

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