Display panel including pre-charging control module and display device

Patent metadata

Field	Value
Publication number	US-12586546-B2
Application number	US-202318254872-A
Country	US
Kind code	B2
Filing date	Apr 18, 2023
Priority date	Nov 15, 2022
Publication date	Mar 24, 2026
Grant date	Mar 24, 2026

Abstract

The embodiments of the present application provide a display panel and a display device. The display panel includes data lines, pixel units, a plurality of gate driving units connected in cascade. At least one gate driving unit includes a pre-charging control module electrically connected with a pre-charging control signal terminal and a scanning signal output terminal of the present stage. The pre-charging control module outputs the pre-charging control signals to the scanning signal output terminal of the present stage, and the data lines output the pre-charging control signals to the corresponding pixel units.

First claim

What is claimed is:

1 . A display panel, comprising:
a plurality of data lines; a plurality of pixel units electrically connected with the data lines; and a plurality of gate driving units connected in cascaded stages; wherein at least one of the gate driving units comprises a pre-charging control module, the pre-charging control module is electrically connected with a pre-charging control signal terminal and a scanning signal output terminal of a present stage, the pre-charging control module is configured to output an pre-charging control signal to the scanning signal output terminal of the present stage; and the data lines are configured to output the pre-charging control signal to corresponding ones of the pixel units; wherein the plurality of the gate driving units are divided into a plurality of gate driving unit groups, each of the gate driving units in each of the gate driving unit groups comprises the pre-charging control module, and a plurality of pre-charging control modules disposed in each of the gate driving unit groups are electrically connected with a same one pre-charging control signal terminal; and wherein a plurality of pre-charging control modules disposed in at least two of the gate driving unit groups arranged at intervals are simultaneously turned on under controls of pre-charging control signals outputted from pre-charging control signal terminals.

2 . The display panel according to claim 1 , wherein a plurality of pre-charging control modules disposed in different ones of the gate driving unit groups are simultaneously turned on under controls of the pre-charging control signals outputted from the pre-charging control signal terminals.

3 . The display panel according to claim 1 , wherein ones of the pixel units corresponding to different ones of the gate driving unit groups are pre-charged for the same time period.

4 . The display panel according to claim 1 , wherein each of the gate driving units further comprises a driving module, the driving module is electrically connected with a cascade control signal terminal, the pre-charging control module, and the scanning signal output terminal of the present stage; the driving module is configured to output a driving signal to the scanning signal output terminal of the present stage and one of the gate driving units of a subsequent stage after the data lines complete the output of a pre-charging voltage, and the data lines are configured to output data voltages to the pixel units.

5 . The display panel according to claim 4 , wherein a peak value of the pre-charging voltage ranges between 50% and 90% of a peak value of the data voltages.

6 . The display panel according to claim 4 , wherein the display panel further comprises a judging unit electrically connected with the pre-charging control module and the data lines; the judging unit is configured to control the pre-charging control module to turn off when a difference value between the data voltages outputted from the data lines to the pixel units corresponding to two adjacent ones of the gate driving unit groups is less than or equal to a predetermined threshold value, and configured to control the pre-charging control module to turn on when the difference value between the data voltages outputted from the data lines to the pixel units corresponding to the two adjacent ones of the gate driving unit groups is greater than the predetermined threshold value.

7 . The display panel according to claim 1 , wherein the plurality of the gate driving units connected in the cascaded stages comprise N gate driving unit groups;
where X≤K≤X*N, and K≤T*30%, X is a scanning period of one row of pixel units in the plurality of pixel units, K is a total pre-charging period corresponding to a plurality of the gate driving unit groups, T is a display period of one frame of image, N is a positive integer, and X, K, and T are positive numbers.

8 . The display panel according to claim 1 , further comprising a plurality of sub-backlight regions disposed along a direction of the scanning line and disposed corresponding to the gate driving unit groups, wherein pre-charging voltages for the pixel units corresponding to the sub-backlight regions are negatively correlated with the brightness of the sub-backlight regions.

9 . A display device, comprising:
a display panel; and a driving circuit disposed on the display panel, wherein the display panel comprises: a plurality of data lines; a plurality of pixel units electrically connected with the data lines; and a plurality of gate driving units connected in cascaded stages; wherein at least one of the gate driving units comprises a pre-charging control module, the pre-charging control module is electrically connected with a pre-charging control signal terminal and a scanning signal output terminal of a present stage, the pre-charging control module is configured to output an pre-charging control signal to the scanning signal output terminal of the present stage; and the data lines are configured to output the pre-charging control signal to corresponding ones of the pixel units; wherein the plurality of the gate driving units are divided into a plurality of gate driving unit groups, each of the gate driving units in each of the gate driving unit groups comprises the pre-charging control module, and a plurality of pre-charging control modules disposed in each of the gate driving unit groups are electrically connected with a same one pre-charging control signal terminal; and wherein a plurality of pre-charging control modules disposed in at least two of the gate driving unit groups arranged at intervals are simultaneously turned on under controls of pre-charging control signals outputted from pre-charging control signal terminals.

10 . The display device according to claim 9 , wherein a plurality of pre-charging control modules disposed in different ones of the gate driving unit groups are simultaneously turned on under controls of the pre-charging control signals outputted from the pre-charging control signal terminals.

11 . The display device according to claim 9 , wherein ones of the pixel units corresponding to different ones of the gate driving unit groups are pre-charged for the same time period.

12 . The display device according to claim 9 , wherein each of the gate driving units further comprises a driving module, the driving module is electrically connected with a cascade control signal terminal, the pre-charging control module, and the scanning signal output terminal of the present stage; the driving module is configured to output a driving signal to the scanning signal output terminal of the present stage and one of the gate driving units of a subsequent stage after the data lines complete the output of a pre-charging voltage, and the data lines are configured to output data voltages to the pixel units.

13 . The display device according to claim 12 , wherein a peak value of the pre-charging voltage ranges between 50% and 90% of a peak value of the data voltages.

14 . The display device according to claim 12 , wherein the display panel further comprises a judging unit electrically connected with the pre-charging control module and the data lines; the judging unit is configured to control the pre-charging control module to turn off when a difference value between the data voltages outputted from the data lines to the pixel units corresponding to two adjacent ones of the gate driving unit groups is less than or equal to a predetermined threshold value, and configured to control the pre-charging control module to turn on when the difference value between the da

Assignees

• Wuhan China Star Optoelectronics Technology Co Ltd

Inventors

• Ma Changwen
• Zhang Zhou
• Li Mingyue

Classifications

• G09G3/36

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• G09G2320/0252

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• G09G2320/0242

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• G09G2310/08

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• G09G2310/0251

  Precharge or discharge of pixel before applying new pixel voltage · CPC title