Touch display panel, drive method, and touch display apparatus

Patent metadata

Field	Value
Publication number	US-12487700-B2
Application number	US-202218290505-A
Country	US
Kind code	B2
Filing date	Sep 7, 2022
Priority date	Nov 30, 2021
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

This application relates to the field of display technologies, and provides a touch display panel, a drive method, and a touch display apparatus, to improve sensitivity of touch and user experience. The touch display panel includes: a plurality of touch electrodes, where the touch electrode is configured to receive a touch scanning signal; and at least one auxiliary electrode, electrically connected to the touch electrode and configured to provide an auxiliary signal to the touch electrode when the touch electrode receives the touch scanning signal, where the auxiliary signal is the same as the touch scanning signal.

First claim

What is claimed is:

1 . A touch display panel, comprising:
a touch electrode, wherein the touch electrode is configured to receive a touch scanning signal; and at least one auxiliary electrode, electrically connected to the touch electrode and configured to provide an auxiliary signal to the touch electrode based on the touch electrode receiving the touch scanning signal, wherein the auxiliary signal has a same voltage value as the touch scanning signal; wherein the touch display panel comprises N touch areas, wherein each touch area of the N touch areas comprises a plurality of self-capacitance touch electrodes; wherein the touch display panel comprises N auxiliary electrodes, wherein the N auxiliary electrodes are electrically connected; wherein the plurality of self-capacitance touch electrodes in a same touch area of the N touch areas is electrically connected to an auxiliary electrode of the at least one auxiliary electrode in the same touch area; wherein N is a positive integer greater than or equal to 1; wherein the touch display panel further comprises a plurality of switch circuits and a plurality of control signal lines, and wherein each switch circuit of the plurality of switch circuits comprises a first end, a second end, and a control end; wherein touch electrodes in the same touch area of the N touch areas are electrically connected to a first end of at least one switch circuit of the plurality of switch circuits, wherein a second end of the at least one switch circuit is electrically connected to the auxiliary electrode in the same touch area, and wherein a control end of the at least one switch circuit is electrically connected to a control signal line of the plurality of control signal lines; wherein the control signal line is used to send a control signal to the control end of the at least one switch circuit, to control the at least one switch circuit to be turned on or turned off; wherein at a first time point, based on self-capacitance touch electrodes in an i th touch area receiving the touch scanning signal:
a switch circuit electrically connected to the touch electrodes in the i th touch area is turned on, and an auxiliary signal is transmitted on the auxiliary electrode to the self-capacitance touch electrode in the i th touch area; and
a capacitor corresponding to the touch electrodes is charged, and the switch circuits electrically connected to the touch electrodes in other touch regions among the N touch areas excluding the i th touch area are turned off, for discharging the capacitor corresponding to the touch electrodes, wherein i is a positive integer greater than or equal to 1, and i is less than or equal to N, for identifying a touch operation performed by a user in the i th touch area at a first time point; and
wherein at a second time point, based on self-capacitance touch electrodes in a k th touch area receiving the touch scanning signal:
a switch circuit electrically connected to the touch electrodes in the k th touch area is turned on, and an auxiliary signal is transmitted on the auxiliary electrode to the self-capacitance touch electrode in the k th touch area; and
the capacitor corresponding to the touch electrodes is charged, and the switch circuits electrically connected to the touch electrodes in other touch regions among the N touch areas excluding the k th touch area are turned off, for discharging the capacitor corresponding to the touch electrodes, wherein k is a positive integer greater than or equal to 1, and k is less than or equal to N, for identifying the touch operation performed by the user in the k th touch area at the first time point.

2 . The touch display panel according to claim 1 , wherein the plurality of self-capacitance touch electrodes in the i th touch area are electrically connected to first ends of the plurality of switch circuits in a one-to-one correspondence.

3 . The touch display panel according to claim 1 , wherein based on the self-capacitance touch electrodes in the same touch area being electrically connected to first ends of at least two switch circuits, control ends of the switch circuits electrically connected to the self-capacitance touch electrodes in the i th touch area are electrically connected to a same control signal line.

4 . The touch display panel according to claim 1 ,
wherein the touch electrode comprises a mutual-capacitance touch electrode; wherein the mutual-capacitance touch electrode comprises L touch drive electrodes and a plurality of touch detection electrodes, the L touch drive electrodes extend in a first direction and are arranged in a second direction, and the plurality of touch detection electrodes extend in the second direction and are arranged in the first direction, wherein the first direction intersects the second direction; wherein the touch display panel comprises L auxiliary electrodes, wherein L is a positive integer greater than or equal to 1; wherein a plurality of auxiliary electrodes are electrically connected to a plurality of touch drive electrodes in a one-to-one correspondence; and wherein each auxiliary electrode in the plurality of auxiliary electrodes is configured to provide the auxiliary signal to the touch drive electrode connected to an auxiliary electrode base on the touch drive electrode receiving the touch scanning signal.

5 . The touch display panel according to claim 4 ,
wherein the L auxiliary electrodes are electrically connected; wherein the touch display panel further comprises a plurality of switch circuits and a plurality of control signal lines, and wherein each switch circuit of the plurality of switch circuits comprises a first end, a second end, and a control end; wherein one touch drive electrode of the L touch drive electrodes is electrically connected to a first end of at least one switch circuit, a second end of the at least one switch circuit is electrically connected to the auxiliary electrode connected to the one touch drive electrode, a control end of the switch circuit is electrically connected to the control signal line, and the control signal line is used to send a control signal to the control end of the switch circuit, to control the switch circuit to be turned on or turned off; and wherein based on a j th touch drive electrode receiving the touch scanning signal, a switch circuit electrically connected to the j th touch drive electrode is configured to transmit an auxiliary signal transmitted on the auxiliary electrode to the j th touch drive electrode, wherein j is a positive integer greater than or equal to 1, and j is less than or equal to L.

6 . The touch display panel according to claim 5 ,
wherein the L touch drive electrodes intersect the plurality of touch detection electrodes to form a plurality of mutual capacitors; and wherein the plurality of mutual capacitors are electrically connected to first ends of the plurality of switch circuits in a one-to-one correspondence.

7 . The touch display panel according to claim 5 , wherein based on a same touch drive electrode being electrically connected to first ends of at least two switch circuits, a control end of the switch circuit electrically connected to the j th touch drive electrode is electrically connected to a same control signal line.

8 . The touch display panel according to claim 1 , wherein the control signal line and the auxiliary electrode are disposed at a same layer.

9 . The touch display panel according to claim 1 , wherein the switch circuit comprises a first transistor.

10 . The touch display panel according to claim 9 ,
wherein the touch display panel comprises a liquid crystal display panel; wherein the liquid crystal display pan

Assignees

• Honor Device Co Ltd

Inventors

• Chen Pengming
• Liang Jide
• Tang Jiehua

Classifications

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• G02F1/13338

  Input devices, e.g. touch panels · CPC title

• H10K59/40

  OLEDs integrated with touch screens · CPC title

• G06F3/04164

  Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads · CPC title

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title