Method and device for driving a display panel and display device

Patent metadata

Field	Value
Publication number	US-12307982-B2
Application number	US-202418610538-A
Country	US
Kind code	B2
Filing date	Mar 20, 2024
Priority date	Jun 23, 2022
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

A method and device for driving a display panel and a display device. The method for driving a display panel includes: determining a brightness mode of the display panel, where the same display grayscale corresponds to different data voltages in different brightness modes; determining a data voltage characterization value according to the brightness mode, where the data voltage characterization value is used for characterizing a data voltage level in the brightness mode; determining a holding voltage corresponding to the data voltage characterization value according to the data voltage characterization value; and inputting, in a display holding frame of a current display image, the holding voltage to a source electrode of a drive transistor in each sub-pixel of the display panel.

First claim

What is claimed is:

1. A method for driving a display panel, comprising:
determining a brightness mode of the display panel, wherein a same display grayscale in different brightness modes corresponds to different data voltages;
determining a data voltage characterization value according to the brightness mode, wherein the data voltage characterization value is used for characterizing a data voltage level of the brightness mode;
determining a holding voltage corresponding to the data voltage characterization value according to the data voltage characterization value; and
inputting, in a display holding frame of a current display image, the holding voltage to a source electrode of a drive transistor in each sub-pixel of the display panel.

2. The method of claim 1 , wherein determining the data voltage characterization value according to the brightness mode comprises:
acquiring display grayscales of a plurality of sub-pixels in the current display image; and
determining the data voltage characterization value of the current display image according to the display grayscales of the plurality of sub-pixels and a voltage coefficient corresponding to the brightness mode.

3. The method of claim 2 , wherein the display panel comprises a plurality of display sub-regions, at least one pixel unit is provided in each of the plurality of display sub-regions, and each of the at least one pixel unit comprises at least one sub-pixel;
determining the data voltage characterization value of the current display image according to the display grayscales of the plurality of sub-pixels and the voltage coefficient corresponding to the brightness mode comprises:
determining a maximum display grayscale of the at least one sub-pixel in each of the at least one pixel unit in each of the plurality of display sub-regions of the display panel to obtain a maximum display grayscale of each of the at least one pixel unit in each of the plurality of display sub-regions;
calculating an average of maximum display grayscales of all pixel units in each of the plurality of display sub-regions to obtain a first grayscale average of the each of the plurality of display sub-regions; and
determining a data voltage characterization value of each of the plurality of display sub-regions according to the first grayscale average of the each of the plurality of display sub-regions and the voltage coefficient corresponding to the brightness mode; and
determining the holding voltage according to the data voltage characterization value comprises:
determining a holding voltage of each of the plurality of display sub-regions according to the data voltage characterization value of the each of the plurality of display sub-regions.

4. The method of claim 3 , wherein
the display panel comprises a plurality of data lines configured to input the holding voltage; and
adjacent sub-pixels along a first direction are electrically connected to a same data line of the plurality of data lines, and the plurality of display sub-regions are arranged along a second direction, wherein the first direction intersects the second direction.

5. The method of claim 2 , wherein the display panel comprises a plurality of pixel units, and each of the plurality of pixel units comprises at least one sub-pixel; and
determining the data voltage characterization value of the current display image according to the display grayscales of the plurality of sub-pixels and the voltage coefficient corresponding to the brightness mode comprises:
determining a maximum display grayscale of the at least one sub-pixel in each of the plurality of pixel units to obtain a maximum display grayscale of each of the plurality of pixel units;
calculating an average of maximum display grayscales of the plurality of pixel units of the display panel to obtain a second grayscale average; and
determining the data voltage characterization value of the display panel according to the second grayscale average and the voltage coefficient corresponding to the brightness mode.

6. The method of claim 2 , wherein determining the data voltage characterization value of the current display image according to the display grayscales of the plurality of sub-pixels and the voltage coefficient corresponding to the brightness mode comprises:
determining the data voltage characterization value of the current display image according to a product of a display grayscale of the display grayscales of the plurality of sub-pixels and the voltage coefficient corresponding to the brightness mode.

7. The method of claim 1 , wherein determining the brightness mode of the display panel comprises:
determining the brightness mode of the display panel according to a position of a brightness bar of the display panel, wherein the different brightness modes correspond to different positions of the brightness bar.

8. The method of claim 1 , wherein each drive cycle comprises one data write frame and N display holding frames, and each of the N display holding frames has a same duration as the one data write frame, wherein N is greater than or equal to 2; and
before inputting, in the display holding frame of the current display image, the holding voltage to the source electrode of the drive transistor in each sub-pixel of the display panel, the method further comprises:
writing, in a data write frame of the current display image, a data voltage corresponding to each sub-pixel to a gate electrode of the drive transistor in the each sub-pixel.

9. A display device, comprising a processor and a memory, wherein the memory is communicatively connected to the at least one processor, the memory stores a computer program that can be executed by the at least one processor, and the computer program is executed by the at least one processor, to enable the at least one processor to execute a method for driving a display panel;
wherein the method comprising:
determining a brightness mode of the display panel, wherein a same display grayscale in different brightness modes corresponds to different data voltages;
determining a data voltage characterization value according to the brightness mode, wherein the data voltage characterization value is used for characterizing a data voltage level of the brightness mode;
determining a holding voltage corresponding to the data voltage characterization value according to the data voltage characterization value; and
inputting, in a display holding frame of a current display image, the holding voltage to a source electrode of a drive transistor in each sub-pixel of the display panel.

10. The display device of claim 9 , wherein determining the data voltage characterization value according to the brightness mode comprises:
acquiring display grayscales of a plurality of sub-pixels in the current display image; and
determining the data voltage characterization value of the current display image according to the display grayscales of the plurality of sub-pixels and a voltage coefficient corresponding to the brightness mode.

11. The display device of claim 10 , wherein the display panel comprises a plurality of display sub-regions, at least one pixel unit is provided in each of the plurality of display sub-regions, and each of the at least one pixel unit comprises at least one sub-pixel;
determining the data voltage characterization value of the current display image according to the display grayscales of the plurality of sub-pixels and the voltage coefficient corresponding to the brightness mode comprises:
determining a maximum display grayscale of the at least one sub-pixel in each of the at least one pixel unit in each of the plurality of display sub-regions of the display panel to obtain a ma

Assignees

• Hefei Visionox Tech Co Ltd
• Kunshan Govisionox Optoelectronics Co Ltd

Inventors

• Song Chuansheng
• Pan Weiwei
• Li Wenxing
• Li Yonggang
• Ge Mingwei
• Zhu Xiujian

Classifications

• G09G2330/021

  Power management, e.g. power saving · CPC title

• G09G2320/0247

  Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes · CPC title

• G09G2310/027

  Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters · CPC title

• G09G2330/028

  Generation of voltages supplied to electrode drivers in a matrix display other than LCD · CPC title

• G09G3/2074

  using sub-pixels · CPC title