Touch structure, touch display panel and driving method

Patent metadata

Field	Value
Publication number	US-11216144-B2
Application number	US-202016878575-A
Country	US
Kind code	B2
Filing date	May 19, 2020
Priority date	Dec 25, 2019
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

Abstract

Provided are a touch structure, a touch display panel and a driving method. The touch structure includes a plurality of touch driving electrodes, a plurality of touch sensing electrodes and a plurality of additional touch driving electrodes, where the plurality of touch driving electrodes, the plurality of touch sensing electrodes and the plurality of additional touch driving electrodes are insulated from each other. The plurality of touch driving electrodes and the plurality of additional touch driving electrodes extend along a first direction and are arranged along a second direction, and the plurality of touch sensing electrodes extend along the second direction and are arranged along the first direction, where the first direction is intersected with the second direction. Each of the plurality of additional touch driving electrodes corresponds to a respective one of the plurality of touch driving electrodes.

First claim

What is claimed is:

1. A touch structure, comprising:
a plurality of touch driving electrodes, a plurality of touch sensing electrodes and a plurality of additional touch driving electrodes, wherein the plurality of touch driving electrodes, the plurality of touch sensing electrodes and the plurality of additional touch driving electrodes are insulated from each other;
wherein the plurality of touch driving electrodes extend along a first direction and are arranged along a second direction, the plurality of touch sensing electrodes extend along the second direction and are arranged along the first direction, and the plurality of additional touch driving electrodes extend along the first direction and are arranged along the second direction, wherein the first direction is intersected with the second direction;
wherein each of the plurality of additional touch driving electrodes corresponds to a respective one of the plurality of touch driving electrodes, and the each of the plurality of additional touch driving electrodes at least has an overlapped portion with the respective one of the plurality of touch driving electrodes; and
wherein the each of the plurality of touch driving electrodes has a touch driving cycle, and in the touch driving cycle, in condition that a touch operation is detected at a corresponding position of the each of the plurality of touch driving electrodes, after a first effective driving pulse signal of the touch driving cycle ends, a second effective driving pulse signal is applied to a respective one of the plurality of additional touch driving electrodes corresponding to the each of the plurality of touch driving electrodes.

2. The touch structure of claim 1 , wherein the plurality of additional touch driving electrodes comprise grid metal wires.

3. The touch structure of claim 2 ,
wherein the plurality of touch driving electrodes and the plurality of touch sensing electrodes are disposed in a same layer;
wherein the each of the plurality of touch driving electrodes comprises a plurality of sub-touch driving electrodes sequentially configured along the first direction, and two adjacent sub-touch driving electrodes of the plurality of sub-touch driving electrodes in the first direction are electrically connected to each other through a metal bridge; or each of the plurality of touch sensing electrodes comprises a plurality of sub-touch sensing electrodes sequentially configured along the second direction, and two adjacent sub-touch driving electrodes of the plurality of sub-touch sensing electrodes in the second direction are electrically connected to each other through the metal bridge; and
wherein the plurality of additional touch driving electrodes and the metal bridge are disposed in a same layer.

4. The touch structure of claim 3 , further comprising a base substrate;
wherein the plurality of touch driving electrodes and the plurality of touch sensing electrodes are disposed on one side of the base substrate; and
wherein the metal bridge is disposed on one side, facing towards the base substrate, of a film layer where the plurality of touch driving electrodes are disposed.

5. The touch structure of claim 1 , wherein an outline of the each of the plurality of additional touch driving electrodes coincides with an outline of the respective one of the plurality of touch driving electrodes.

6. The touch structure of claim 1 , further comprising a virtual touch electrode, wherein the virtual touch electrode and the plurality of additional touch driving electrodes are insulated from each other and are disposed in a same layer; and
wherein the virtual touch electrode is disposed between two adjacent additional touch driving electrodes of the plurality of additional touch driving electrodes.

7. The touch structure of claim 1 , wherein an area of the each of the plurality of additional touch driving electrodes is the same as an area of the respective one of the plurality of touch driving electrodes.

8. The touch structure of claim 1 , wherein a value of capacitance between the each of the plurality of touch driving electrodes and a respective one of the plurality of touch sensing electrodes is C 1 , and a value of capacitance between the respective one of the plurality of additional touch driving electrodes corresponding to the each of the plurality of touch driving electrodes and the plurality of touch sensing electrodes is C 2 ;
in condition that C 1 is equal to C 2 , an amplitude of the first effective driving pulse signal is equal to an amplitude of the second effective driving pulse signal;
in condition that C 1 is greater than C 2 , the amplitude of the first effective driving pulse signal is smaller than the amplitude of the second effective driving pulse signal; and
in condition that C 1 is less than C 2 , the amplitude of the first effective driving pulse signal is greater than the amplitude of the second effective driving pulse signal.

9. The touch structure of claim 1 , wherein a touch side is one side of the plurality of additional touch driving electrodes facing away from the plurality of touch driving electrodes;
wherein an area of the each of the plurality of additional touch driving electrodes is smaller than an area of the respective one of the plurality of touch driving electrodes corresponding to the each of the plurality of additional touch driving electrodes; and/or
wherein an amplitude of the first effective driving pulse signal is greater than a amplitude of the second effective driving pulse signal.

10. The touch structure of claim 1 , wherein a touch side of the plurality of touch driving electrodes facing away from the plurality of additional touch driving electrodes;
wherein an area of the each of the plurality of additional touch driving electrodes is larger than an area of the respective one of the plurality of touch driving electrodes corresponding to the each of the plurality of additional touch driving electrodes; and/or
wherein an amplitude of the first effective driving pulse signal is smaller than a amplitude of the second effective driving pulse signal.

11. A touch display panel, comprising a touch structure, wherein the touch structure comprises:
a plurality of touch driving electrodes, a plurality of touch sensing electrodes and a plurality of additional touch driving electrodes, wherein the plurality of touch driving electrodes, the plurality of touch sensing electrodes and the plurality of additional touch driving electrodes are insulated from each other;
wherein the plurality of touch driving electrodes extend along a first direction and are arranged along a second direction, the plurality of touch sensing electrodes extend along the second direction and are arranged along the first direction, and the plurality of additional touch driving electrodes extend along the first direction and are arranged along the second direction, wherein the first direction is intersected with the second direction;
wherein each of the plurality of additional touch driving electrodes corresponds to a respective one of the plurality of touch driving electrodes, and the each of the plurality of additional touch driving electrodes at least has an overlapped portion with the respective one of the plurality of touch driving electrodes; and
wherein the each of the plurality of touch driving electrodes has a touch driving cycle, and in the touch driving cycle, in condition that a touch operation is detected at a corresponding position of the each of the plurality of touch driving electrodes, after a first effective driving pulse signal of the touch driving cycle ends, a second effective driving pulse signal is applied to a respective one of the plur

Assignees

• Xiamen Tianma Micro Electronics Co Ltd

Inventors

• Chen Min

Classifications

• G06F3/044

  by capacitive means · 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

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/047 Primary

  using sets of wires, e.g. crossed wires · CPC title

• G06F3/0445 Primary

  using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer · CPC title