Touch control component and touch control display device

Patent metadata

Field	Value
Publication number	US-11941206-B2
Application number	US-202017284454-A
Country	US
Kind code	B2
Filing date	Dec 30, 2020
Priority date	Dec 25, 2020
Publication date	Mar 26, 2024
Grant date	Mar 26, 2024

Abstract

A touch control component and a touch control display device are provided. The present disclosure can improve touch control sensitivity of the touch control component by at least one second branch electrode surrounding at least one first branch electrode corresponding thereto, by at least one third branch electrode adjacent to the at least one first branch electrode surrounding the at least one second branch electrode positioned between the at least one first branch electrode and the at least one third branch electrode, and by two adjacent third branch electrodes respectively positioned in two of touch control units adjacent to each other in a first direction being connected to each other on one end away from the third branch electrodes connected to a first main stem electrode.

First claim

What is claimed is:

1. A touch control component, comprising a plurality of touch control units, wherein each of the touch control units comprises a first electrode and a second electrode electrically insulated from each other;
the first electrode comprises:
a first main stem electrode extending along a first direction;
at least one first branch electrode extending from an intersection of the first main stem electrode and a second main stem electrode to a direction away from the first main stem electrode and the second main stem electrode; and
a plurality of first electrode extending parts;
the second electrode comprises:
the second main stem electrode extending along a second direction, and
at least one second branch electrode extending from the intersection of the first main stem electrode and the second main stem electrode to the direction away from the first main stem electrode and the second main stem electrode;
wherein the first electrode further comprises at least one third branch electrode extending from the first main stem electrode to the direction away from the first main stem electrode and the second main stem electrode and disposed adjacent to at least one of the at least one first branch electrode;
wherein one end of each of the first electrode extending parts is connected to a junction of the two adjacent third branch electrodes in the two of the touch control units adjacent to each other in the first direction, another end of each of the first electrode extending parts extends to a junction of two of the touch control units adjacent to each other in the second direction, and two of the first electrode extending parts adjacent to each other are electrically insulated from each other;
wherein each of the first electrode extending parts comprises a first electrode extending main stem part and two first electrode extending branch parts extending from the first electrode extending main stem part, an area surrounded by the two first electrode extending branch parts is provided with a third dummy electrode, and the third dummy electrode is electrically insulated from the first electrode;
the at least one second branch electrode surrounds the at least one first branch electrode corresponding to the at least one second branch electrode, and the at least one third branch electrode adjacent to the at least one first branch electrode surrounds the at least one second branch electrode positioned between the at least one first branch electrode and the at least one third branch electrode; and
in the first direction, two adjacent third branch electrodes respectively positioned in two of the touch control units adjacent to each other are connected to each other on one end away from the third branch electrodes connected to the first main stem electrode, and the first direction and the second direction are different.

2. The touch control component according to claim 1 , wherein in the second direction, an area surrounded by two adjacent second branch electrodes respectively positioned in two of the touch control units adjacent to each other and the second main stem electrode is provided with a first dummy electrode, and the first dummy electrode is electrically insulated from the second electrode; and
the second branch electrodes positioned between the first dummy electrode and the at least one first branch electrode mesh with the at least one first branch electrode and the first dummy electrode, respectively.

3. The touch control component according to claim 2 , wherein in the first direction, an area surrounded by the two adjacent third branch electrodes respectively positioned in the two of the touch control units adjacent to each other and the first main stem electrode is provided with a second dummy electrode, the second dummy electrode is electrically insulated from the first electrode, and the third branch electrodes mesh with the second dummy electrode.

4. The touch control component according to claim 1 , wherein in the second direction, two adjacent second branch electrodes respectively positioned in two of the touch control units adjacent to each other are connected to each other on one end away from the second branch electrodes connected to the second main stem electrode.

5. The touch control component according to claim 1 , wherein the at least one second branch electrode positioned between the at least one first branch electrode and the at least one third branch electrode meshes with the at least one first branch electrode and the at least one third branch electrode, respectively.

6. The touch control component according to claim 5 , wherein each of the at least one first branch electrode comprises a plurality of widening parts and a plurality of narrowing parts, and the widening parts and the narrowing parts are alternatingly connected to each other;
each of the at least one second branch electrode comprises a plurality of first convex parts corresponding to the widening parts, a plurality of second convex parts corresponding to the narrowing parts, and a first connection part, the first convex parts are connected to one side of the first connection part away from the at least one first branch electrode, the second convex parts are connected to another side of the first connection part adjacent to the at least one first branch electrode, and the first convex parts and the second convex parts are alternatingly arranged along the first connection part; and
each of the at least one third branch electrode comprises a plurality of third convex parts corresponding to the first convex parts, a plurality of fourth convex parts corresponding to the second convex parts, and a second connection part, the third convex parts are connected to one side of the second connection part away from the at least one first branch electrode, the fourth convex parts are connected to another side of the second connection part adjacent to the at least one first branch electrode, and the third convex parts and the fourth convex parts are alternatingly arranged along the second connection part.

7. The touch control component according to claim 6 , wherein the first convex parts are same as the second convex parts, the third convex parts are same as the fourth convex parts, and the first convex parts are same as the third convex parts.

8. The touch control component according to claim 6 , wherein the first electrode is set symmetrically about the first main stem electrode and the second main stem electrode, and the second electrode is set symmetrically about the first main stem electrode and the second main stem electrode;
the first main stem electrode comprises two first sub main stem electrodes set symmetrically about the second main stem electrode, and the two first sub main stem electrodes of the first main stem electrode are connected to each other by a third connection part; and
the second main stem electrode comprises two second sub main stem electrodes set symmetrically about the first main stem electrode, and the two second sub main stem electrodes of the second main stem electrode are connected to each other by a bridging part.

9. The touch control component according to claim 8 , wherein one first branch electrode and one third branch electrode extend from each side of each of the first sub main stem electrodes; and
one second branch electrode extends from each side of each of the second sub main stem electrodes.

10. The touch control component according to claim 1 , wherein the at least one third branch electrode is disposed parallel to the at least one first branch electrode adjacent to each other.

11. The touch control component according to claim 1 , wherein an included angle between the at l

Assignees

• Wuhan China Star Optoelectronics Semiconductor Display Tech Co Ltd

Inventors

• Wang Jieping
• Ye Jian

Classifications

• G06F3/0418 Primary

  for error correction or compensation, e.g. based on parallax, calibration or alignment · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/0443

  using a single layer of sensing electrodes · 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

• 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