Display panel driving method and display device

Patent metadata

Field	Value
Publication number	US-12387646-B2
Application number	US-202318401349-A
Country	US
Kind code	B2
Filing date	Dec 30, 2023
Priority date	Dec 8, 2023
Publication date	Aug 12, 2025
Grant date	Aug 12, 2025

Abstract

A display panel driving method and a display device are provided. The display panel driving method includes: receiving a refresh rate switching instruction, where the refresh rate switching instruction is configured to control a display panel to switch from a first refresh rate to a second refresh rate; causing an input first video signal with a first image resolution and a first frame rate to be generated into a second video signal with a second image resolution and a second frame rate according to the refresh rate switching instruction; and outputting a scan driving signal corresponding to the second refresh rate and the second video signal to a plurality of pixels of the display panel.

First claim

What is claimed is:

1. A display panel driving method, comprising:
receiving a refresh rate switching instruction, wherein the refresh rate switching instruction is configured to control a display panel to switch from a first refresh rate to a second refresh rate;
causing an input first video signal with a first image resolution and a first frame rate to be generated into a second video signal with a second image resolution and a second frame rate according to the refresh rate switching instruction; and
outputting a scan driving signal corresponding to the second refresh rate and the second video signal to a plurality of pixels of the display panel;
wherein the step of causing the input first video signal with the first image resolution and the first frame rate to be generated into the second video signal with the second image resolution and the second frame rate according to the refresh rate switching instruction comprises:
causing the first video signal to be generated into a third video signal with the first image resolution and the second frame rate according to the refresh rate switching instruction; and
causing the third video signal to be generated into the second video signal.

2. The display panel driving method of claim 1 , wherein the second refresh rate is twice the first refresh rate, and the second frame rate is twice the first frame rate;
wherein the step of causing the first video signal to be generated into the third video signal with the first image resolution and the second frame rate according to the refresh rate switching instruction comprises:
causing one first video signal to be generated into two first video signals according to the refresh rate switching instruction;
combining the two first video signals into the third video signal, wherein a (2L−1)th frame image in the third video signal is the same as a 2L-th frame image, and is the same as an L-th frame image in the first video signal, and L is a positive integer;
wherein the step of causing the third video signal to be generated into the second video signal comprises:
acquiring image data of odd-numbered columns of a M-th frame image in the third video signal and image data of even-numbered columns of a (M+1)th frame image in the third video signal, wherein M is a positive integer; and
generating the second video signal according to the image data of the odd-numbered columns of the M-th frame image and the image data of the even-numbered columns of the (M+1)th frame image, wherein image data of a M-th frame image in the second video signal comprises the image data of the odd-numbered columns of the M-th frame image in the third video signal, and image data of a (M+1)th frame image in the second video signal comprises the image data of the even-numbered columns of the (M+1)th frame image in the third video signal.

3. The display panel driving method of claim 2 , wherein the step of outputting the scan driving signal corresponding to the second refresh rate and the second video signal to the plurality of pixels of the display panel comprises:
outputting image data of P columns of a N-th frame image in the second video signal to pixels of P odd-numbered columns of the display panel within a driving period of the N-th frame image according to the second refresh rate, and outputting a common voltage to pixels of P even-numbered columns of the display panel within the driving period of the N-th frame image; and
outputting image data of P columns of a (N+1)th frame image in the second video signal to the pixels of the P even-numbered columns of the display panel within a driving period of the (N+1)th frame image, and outputting the common voltage to the pixels of the P odd-numbered columns of the display panel within the driving period of the (N+1)th frame image;
wherein N and P are both positive integers.

4. The display panel driving method of claim 2 , wherein the step of outputting the scan driving signal corresponding to the second refresh rate and the second video signal to the plurality of pixels of the display panel comprises:
outputting image data of P columns of a N-th frame image in the second video signal to pixels of P odd-numbered columns of the display panel within a driving period of the N-th frame image according to the second refresh rate, and disconnecting a current path between a source drive circuit of the display panel and pixels of P even-numbered columns of the display panel within the driving period of the N-th frame image; and
outputting image data of P columns of a (N+1)th frame image in the second video signal to the pixels of the P even-numbered columns of the display panel within a driving period of the (N+1)th frame image, and disconnecting a current path between the source drive circuit and the pixels of the P odd-numbered columns of the display panel within the driving period of the (N+1)th frame image;
wherein N and P are both positive integers.

5. The display panel driving method of claim 1 , wherein the display panel further comprises a plurality of scan lines and a plurality of data lines, one of the scan lines is electrically connected to one row of pixels, and one of the data lines is electrically connected to one column of pixels.

6. The display panel driving method of claim 1 , wherein the display panel further comprises a gate drive circuit and a source drive circuit; a scan start signal, a reset signal, a clock signal are input into the gate drive circuit; and a high-level of one of the scan start signal and the reset signal is the same as a high-level of the clock signal.

7. The display panel driving method of claim 1 , wherein according to a timing control signal corresponding to the second refresh rate, the scan driving signal corresponding to the second refresh rate is output to a plurality of rows of pixels of the display panel.

8. The display panel driving method of claim 1 , wherein according to a timing control signal corresponding to the second refresh rate, the second video signal is output to a plurality of columns of pixels of the display panel.

9. The display panel driving method of claim 1 , wherein a duty cycle of the scan driving signal corresponding to the second refresh rate is equal to a duty cycle of the scan driving signal corresponding to the first refresh rate; and/or
wherein a pulse amplitude of the scan driving signal corresponding to the second refresh rate is greater than a pulse amplitude of the scan driving signal corresponding to the first refresh rate.

10. The display panel driving method of claim 1 , wherein in image data of odd-numbered frames, image data corresponding to pixels of odd-numbered columns of the display panel is retained, and image data corresponding to pixels of even-numbered columns of the display panel is removed; and
in image data of even-numbered frames, the image data corresponding to the pixels of the even-numbered columns of the display panel is retained, and the image data corresponding to the pixels of the odd-numbered columns of the display panel is removed.

11. The display panel driving method of claim 1 , wherein in image data of odd-numbered frames, a voltage of image data corresponding to pixels of even-numbered columns of the display panel is assigned as a voltage of a common electrode of the display panel; and in image data of the even-numbered frames, a voltage of image data corresponding to pixels of odd-numbered columns of the display panel is assigned as the voltage of the common electrode of the display panel.

12. A display device, comprising a display panel and a control chip, wherein the display panel comprises a gate drive circuit, a source drive circuit, and a plurality of pixels,

Assignees

• Tcl China Star Optoelectronics Tech Co Ltd

Inventors

• Chang Shuming
• Li Zhifu
• Wu Yu
• He Tao
• Wen Yating
• Zheng Weisheng
• Zhang Yuning
• Wang Qian
• Deng Shijie
• Liang Zhaoming
• Chen Fan

Classifications

• G09G3/36

  using liquid crystals · CPC title

• G09G3/3208

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

• G09G3/32 Primary

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

• G09G2330/021

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

• G09G2360/00

  Aspects of the architecture of display systems · CPC title