Display panel, drive method for a display panel, and display device

Inventors: Yuhao Zhong (Xiamen, CN); Xuhui Peng (Xiamen, CN); Haiying Xiao (Xiamen, CN); Jianlong Song (Xiamen, CN)

Assignees: Xiamen Tianma Optoelectronics Co., Ltd.; Xiamen Tianma Microelectronics Co., Ltd.

G06F3/04184 G06F3/0412 G06F3/04164

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Quick Facts

Patent No.: US 12669899
App. No.: 18/736,570
Granted: Jun 30, 2026
Kind: B2

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Abstract

A display panel, a drive method for a display panel, and a display device. The display panel includes: display subregions; touch subregions, where one touch subregion overlaps at least one display subregion; and control units, where one control unit is electrically connected to touch electrodes of at least one touch subregion. A drive cycle includes alternating display stages and touch stages. In the display stage, data voltages are written into the pixel electrodes in a corresponding display subregion, a portion of the control units operate to transmit a common voltage to touch electrodes in a portion of the touch subregions, and the touch subregion into which the common voltage is written overlaps the display subregion into which the data voltages are written. In the effective touch time period, none of the control units operate, and each touch electrode senses and transmits a touch signal to the touch signal line.

Claims (45)

1 . A display panel, comprising:

a plurality of display subregions arranged along a first direction, wherein each display subregion comprises a plurality of pixel electrodes;

at least two touch subregions arranged along the first direction, wherein each touch subregion comprises a plurality of touch electrodes, each touch electrode is electrically connected to a touch signal line, and one touch subregion overlaps at least one display subregion; and

at least two control units, wherein one control unit is electrically connected to the touch electrodes in at least one touch subregion through connecting lines, and the control unit is configured to transmit a common voltage to the touch electrodes connected to the control unit during operation,

wherein the touch subregions comprise a plurality of first touch subregions and a plurality of second touch subregions, and the first touch subregions and the second touch subregions are alternately arranged; and

the control units comprise a first control unit and a second control unit, the first control unit is electrically connected to the touch electrodes in the plurality of first touch subregions, and the second control unit is electrically connected to the touch electrodes in the plurality of second touch subregions, and

wherein a one-frame drive cycle of the display panel comprises alternating display stages and touch stages, each touch stage comprises an effective touch time period and a blank time period, and one display stage corresponds to one display subregion;

in the display stage, data voltages are written into the pixel electrodes in a corresponding display subregion, a portion of the control units operate to transmit the common voltage to the touch electrodes in a portion of the touch subregions, and the touch subregion into which the common voltage is written overlaps the display subregion into which the data voltages are written; and

in the effective touch time period, none of the control units operate, and each of the touch electrodes senses a touch signal and transmits the touch signal to the touch signal line.

2 . The display panel according to claim 1 , wherein a number of the touch subregions is equal to a number of the display subregions, and one touch subregion overlaps one display subregion.

3 . The display panel according to claim 1 , wherein the connecting lines extend along the first direction, and the control units are located on at least one side of the connecting lines in the first direction.

4 . The display panel according to claim 1 , wherein the connecting lines extend along a second direction, the control units are located on at least one side of the connecting lines in the second direction, and the second direction intersects the first direction.

5 . The display panel according to claim 1 , wherein in a same touch subregion, the touch electrodes arranged in a direction in which the connecting lines extend are electrically connected to one connecting line.

6 . The display panel according to claim 1 , wherein the control unit comprises a plurality of first switches, each first switch is electrically connected to the touch electrode through one connecting line of the connecting lines, and in the display stage, the first switches in a portion of the control units are turned on in response to a control signal, to transmit the common voltage to the touch electrodes connected to the first switches.

7 . The display panel according to claim 6 , wherein each connecting line has a first end and a second end each electrically connected to one first switch, and the first switches electrically connected to a same connecting line receive a same control signal in the display stage and receive a same control signal in the touch stage.

8 . The display panel according to claim 6 , wherein each first switch has an input terminal electrically connected to a first voltage signal line and an output terminal electrically connected to a first end of one connecting line of the connecting lines; and

the display panel further comprises second switches and third switches, each second switch includes an input terminal electrically connected to a second voltage signal line and an output terminal electrically connected to a second end of one connecting line of the connecting lines, and each third switch includes an input terminal electrically connected to a third voltage signal line and an output terminal electrically connected to a second end of one connecting line of the connecting lines;

wherein the third switches and the second switches are electrically connected to different connecting lines, the touch electrodes coupled to the second switches and the touch electrodes coupled to the third switches are alternately arranged in both the first direction and a second direction, and the second direction intersects the first direction.

9 . The display panel according to claim 8 , wherein for the first switch and the second switch connected to a same connecting line, a control terminal of the first switch and a control terminal of the second switch are connected to a same control signal line;

for the first switch and the third switch connected to a same connecting line, a control terminal of the first switch and a control terminal of the third switch are connected to a same control signal line; and

in the display stage, the first voltage signal line, the second voltage signal line, and the third voltage signal line provide a same common voltage.

10 . The display panel according to claim 1 , wherein an operation starting moment of the control unit falls within the blank time period before the display stage during which the control unit operates.

11 . The display panel according to claim 10 , wherein a time interval is provided between the operation starting moment of the control unit and the effective touch time period.

12 . A drive method for a display panel, wherein the display panel comprises:

a plurality of display subregions arranged along a first direction, wherein each display subregion comprises a plurality of pixel electrodes;

the drive method comprises:

in the display stage, writing data voltages into the pixel electrodes in a corresponding display subregion, and causing a portion of the control units to operate to transmit the common voltage to the touch electrodes in a portion of the touch subregions, wherein the touch subregion that receives the common voltage overlaps the display subregion into which the data voltages are written; and

in the effective touch time period, causing none of the control units to operate, and sensing, by each of the touch electrodes, a touch signal and transmitting, by the each of the touch electrodes, the touch signal to the touch signal line.

13 . The drive method according to claim 12 , wherein an operation starting moment of the control unit falls within the blank time period before the display stage during which the control unit operates.

14 . The drive method according to claim 13 , wherein a time interval is provided between the operation starting moment of the control unit and the effective touch time period.

15 . A display device, comprising a display panel, wherein the display panel comprises:

a plurality of display subregions arranged along a first direction, wherein each display subregion comprises a plurality of pixel electrodes;

in the effective touch time period, none of the control units operate, and each of the touch electrodes senses a touch signal and transmits the touch signal to the touch signal line.

16 . The display device according to claim 15 , wherein the display device further comprises a timing controller, the timing controller is configured to provide a control signal for driving the control units to operate.