Touch electrode structure with branch electrodes, touch panel and display device

Patent metadata

Field	Value
Publication number	US-12159014-B2
Application number	US-202117921093-A
Country	US
Kind code	B2
Filing date	Oct 26, 2021
Priority date	Apr 29, 2021
Publication date	Dec 3, 2024
Grant date	Dec 3, 2024

Abstract

Provided is a touch electrode structure. The touch electrode structure includes a plurality of touch electrode patterns, wherein each of the touch electrode patterns includes a first touch electrode and a second touch electrode, and the first touch electrodes and second touch electrodes of touch electrode patterns of the touch electrode structure are insulated. Branch electrodes of the first touch electrode and branch electrodes of the second touch electrode are disposed in at least one of a first region defined by first main body electrodes of two first touch electrodes and a second region defined by second main body electrodes of two second touch electrodes.

First claim

What is claimed is:

1. A touch electrode structure, comprising: a plurality of touch electrode patterns, wherein each of the touch electrode patterns comprises:
a first touch electrode, comprising a first main body electrode and branch electrodes electrically connected to the first main body electrode, wherein the first main body electrode of each of the touch electrode pattern comprises a first part and a second part which are arranged in a first direction; and
a second touch electrode, insulated from the first touch electrode, and comprising a second main body electrode and branch electrodes electrically connected to the second main body electrode, wherein the second main body electrode of each of the touch electrode pattern comprises a third part and a fourth part which are arranged in a second direction, the second direction being intersected with the first direction;
wherein in two touch electrode patterns adjacent to each other in the first direction, the first part of the first main body electrode of one touch electrode pattern and the second part of the first main body electrode of the other touch electrode pattern define a first region; in two touch electrode patterns adjacent to each other in the second direction, the third part of the second main body electrode of the second touch electrode of one touch electrode pattern and the fourth part of the second main body electrode of the second touch electrode of the other touch electrode pattern define a second region; and
at least one of the first region and the second region comprises the branch electrodes of the first touch electrode and the branch electrodes of the second touch electrode, and a gap is defined between each of the branch electrodes of the first touch electrode and each of the branch electrodes of the second touch electrode which are disposed in the same region;
wherein the branch electrodes of the first touch electrode comprise first branch electrodes, and the branch electrodes of the second touch electrode comprise second branch electrodes; the first branch electrodes and the second branch electrodes are disposed in the first region, and a gap is defined between each of the first branch electrodes and each of the second branch electrodes;
wherein the second touch electrode further comprises a first connection electrode and a second connection electrode which are disposed in a same layer as the second branch electrodes; the first connection electrode is disposed in the first region and is electrically connected to the second branch electrodes, and one terminal of the second connection electrode is electrically connected to the second branch electrodes, and another terminal of the second connection electrode is electrically connected to the second main body electrode; and
wherein the second main body electrode further comprises a bridge part; the first touch electrode, the third part, the fourth part, the second branch electrodes, the first connection electrode, and the second connection electrode are disposed in the same layer; the touch electrode structure further comprises an insulating layer provided with vias; and the bridge part and the third part are disposed in different layers, one terminal of the bridge part is electrically connected to the third part by the via, and another terminal of the bridge part is electrically connected to the fourth part by the via.

2. The touch electrode structure according to claim 1 , wherein an extending direction of at least part of at least one boundary of the first branch electrode is parallel to an extending direction of at least part of at least one boundary of the second branch electrode.

3. The touch electrode structure according to claim 1 , wherein the other terminal of the second connection electrode is electrically connected to the third part or the fourth part by the bridge part.

4. The touch electrode structure according to claim 1 , wherein one side, close to the second main body, of the first main body electrode is provided with a plurality of first protrusive structures, and one side, close to the first main body electrode, of the second main body electrode is provided with a plurality of second protrusive structures; and
the plurality of first protrusive structures and the plurality of second protrusive structures are alternately arranged, and a gap is defined between the first protrusive structure and the second protrusive structure which are adjacent to each other.

5. The touch electrode structure according to claim 1 , wherein each touch electrode pattern further comprises: a floating electrode disposed in the same layer as the first touch electrode; and
the floating electrode is insulated from both the first touch electrode and the second touch electrode.

6. The touch electrode structure according to claim 1 , wherein the branch electrodes of the first touch electrode further comprise third branch electrodes, and the branch electrodes of the second touch electrode further comprise fourth branch electrodes;
wherein the third branch electrodes and the fourth branch electrodes are disposed in the second region, and a gap is defined between each of the third branch electrodes and each of the fourth branch electrodes.

7. The touch electrode structure according to claim 6 , wherein an extending direction of at least part of at least one boundary of the third branch electrode is parallel to an extending direction of at least part of at least one boundary of the fourth branch electrode.

8. The touch electrode structure according to claim 7 , wherein the first touch electrode further comprises a third connection electrode and a fourth connection electrode;
wherein the third connection electrode is disposed in the second region and is electrically connected to the third branch electrodes; and
one terminal of the fourth connection electrode is electrically connected to the third branch electrodes, and the other terminal of the fourth connection electrode is electrically connected to the first main body electrode.

9. The touch electrode structure according to claim 8 , wherein each of the third part and the fourth part comprises a first subpart and a second subpart, a gap being defined between the first subpart and the second subpart; and
at least part of the fourth connection electrode is disposed within the gap between the first subpart and the second subpart.

10. The touch electrode structure according to claim 1 , wherein the branch electrodes of the first touch electrode, the first part, the second part, the branch electrodes of the second touch electrode, the third part, and the fourth part are all grid-like structures.

11. The touch electrode structure according to claim 10 , wherein grid lines of the grid-like structure are provided with at least one fracture.

12. A touch panel, comprising: a display substrate and a touch electrode structure disposed on the display substrate, wherein the touch electrode structure comprises:
a first touch electrode, comprising a first main body electrode and branch electrodes electrically connected to the first main body electrode, wherein the first main body electrode of each of the touch electrode pattern comprises a first part and a second part which are arranged in a first direction; and
a second touch electrode, insulated from the first touch electrode, and comprising a second main body electrode and branch electrodes electrically connected to the second main body electrode, wherein the second main body electrode of each of the touch electrode pattern comprises a third part and a fourth part which are arranged in a second direction, the second direction being intersected with the first direction;
wherein in

Assignees

• Chengdu Boe Optoelect Tech Co
• Boe Technology Group Co Ltd
• Beijing Boe Technology Dev Co Ltd

Inventors

• Wang Lingran
• Yan Jun
• Jiang Zhiliang
• Zhao Erjin

Classifications

• G06F2203/04111

  Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · 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

• G06F3/0445

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

• G06F3/0443

  using a single layer of sensing electrodes · CPC title