Touch module and touch screen

Patent metadata

Field	Value
Publication number	US-2021149525-A1
Application number	US-202016835425-A
Country	US
Kind code	A1
Filing date	Mar 31, 2020
Priority date	Nov 19, 2019
Publication date	May 20, 2021
Grant date	—

Abstract

The present application provides a touch module and a touch screen. The touch module includes a first metal grid layer and a second metal grid layer. First touch electrodes are disposed in the first metal grid layer and arranged along a first direction, and each of the first touch electrodes extends along a second direction which intersects the first direction. Second touch electrodes are disposed in the second metal grid layer and arranged along the second direction, and each of the second touch electrodes extends along the first direction. The touch module further includes a first dummy electrode and a second dummy electrode, where the first dummy electrode is coupled to a part of the second touch electrode in parallel and the second dummy electrode is coupled to a part of the first touch electrode in parallel.

First claim

What is claimed is:

1 . A touch module, comprising:
a first metal grid layer and a second metal grid layer, wherein:
a plurality of first touch electrodes are disposed in the first metal grid layer and arranged along a first direction, and each of the first touch electrodes extends along a second direction which intersects the first direction;
a plurality of second touch electrodes are disposed in the second metal grid layer and arranged along the second direction, and each of the second touch electrodes extends along the first direction; and
the touch module further comprises a first dummy electrode and a second dummy electrode, the first dummy electrode is coupled to a part of the second touch electrode in parallel, and the second dummy electrode is coupled to a part of the first touch electrode in parallel.

2 . The touch module according to claim 1 , wherein:
the first dummy electrode is disposed in the first metal grid layer and is disposed between adjacent first touch electrodes; and the second dummy electrode is disposed in the second metal grid layer and is disposed between adjacent second touch electrodes.

3 . The touch module according to claim 2 , wherein:
a first insulation layer is provided between the first metal grid layer and the second metal grid layer; the first dummy electrode is coupled to the part of the second touch electrode in parallel through a first connection hole disposed in the first insulation layer; and the second dummy electrode is coupled to the part of the first touch electrode in parallel through a second connection hole disposed in the first insulation layer.

4 . The touch module according to claim 2 , wherein:
a plurality of the first dummy electrodes are disposed between two adjacent first touch electrodes and arranged along the second direction; and a plurality of the second dummy electrodes are disposed between two adjacent second touch electrodes and are arranged along the first direction.

5 . The touch module according to claim 1 , wherein:
the first dummy electrode is disposed in the second metal grid layer, and is attached to or covers the part of the second touch electrode to which the first dummy electrode is coupled in parallel; and the second dummy electrode is disposed in the first metal grid layer, and is attached to or covers the part of the first touch electrode to which the second dummy electrode is coupled in parallel.

6 . The touch module according to claim 1 , wherein:
a first insulation layer is provided between the first metal grid layer and the second metal grid layer, a plurality of the first dummy electrodes are provided and are divided into a first type of the first dummy electrode and a second type of the first dummy electrode, wherein the first type of the first dummy electrode is disposed in the first metal grid layer, is located between adjacent first touch electrodes, and is coupled to a first part of the second touch electrode in parallel through a first connection hole, disposed in the first insulation layer and the second type of the first dummy electrode is disposed in the second metal grid layer, and is attached to or covers a second part of the second touch electrode to which the second type of the first dummy electrode is coupled in parallel; and a plurality of the second dummy electrodes are provided and are divided into a first type of the second dummy electrode and a second type of the second dummy electrode, wherein the first type of the second dummy electrode is disposed in the second metal grid layer, is located between adjacent second touch electrodes, and is coupled to a first part of the first touch electrode in parallel through a second connection hole disposed in the first insulation layer, and the second type of the second dummy electrode is disposed in the first metal grid layer, and is attached to or covers a second part of the first touch electrode to which the second type of the second dummy electrode is coupled in parallel.

7 . The touch module according to claim 6 , wherein an electrode material is not disposed in a region of the first metal grid layer toward which the second type of the first dummy electrode faces, and the electrode material is not disposed in a region of the second metal grid layer toward which the second type of the second dummy electrode faces.

8 . The touch module according to claim 1 , wherein the first direction and the second direction are perpendicular to each other.

9 . The touch module according to claim 1 , wherein at least one of the first dummy electrode and the second dummy electrode is in a grid metal shape.

10 . A touch screen, comprising:
a touch module comprising a first metal grid layer and a second metal grid layer, wherein: a plurality of first touch electrodes are disposed in the first metal grid layer and arranged along a first direction, and each of the first touch electrodes extends along a second direction which intersects the first direction; a plurality of second touch electrodes are disposed in the second metal grid layer and arranged along the second direction, and each of the second touch electrodes extends along the first direction; and the touch module further comprises a first dummy electrode and a second dummy electrode, the first dummy electrode is coupled to a part of the second touch electrode in parallel, and the second dummy electrode is coupled to a part of the first touch electrode in parallel.

11 . The touch screen according to claim 10 , wherein:
the first dummy electrode is disposed in the first metal grid layer and is disposed between adjacent first touch electrodes; and the second dummy electrode is disposed in the second metal grid layer and is disposed between adjacent second touch electrodes.

12 . The touch screen according to claim 11 , wherein:
a first insulation layer is provided between the first metal grid layer and the second metal grid layer; the first dummy electrode is coupled to the part of the second touch electrode in parallel through a first connection hole disposed in the first insulation layer; and the second dummy electrode is coupled to the part of the first touch electrode in parallel through a second connection hole disposed in the first insulation layer.

13 . The touch screen according to claim 11 , wherein:
a plurality of the first dummy electrodes are disposed between two adjacent first touch electrodes and arranged along the second direction; and a plurality of the second dummy electrodes are disposed between two adjacent second touch electrodes and are arranged along the first direction.

14 . The touch screen according to claim 10 , wherein:
the first dummy electrode is disposed in the second metal grid layer, and is attached to or covers the part of the second touch electrode to which the first dummy electrode is coupled in parallel; and the second dummy electrode is disposed in the first metal grid layer, and is attached to or covers the part of the first touch electrode to which the second dummy electrode is coupled in parallel.

15 . The touch screen according to claim 10 , wherein:
a first insulation layer is provided between the first metal grid layer and the second metal grid layer; a plurality of the first dummy electrodes are provided and are divided into a first type of the first dummy electrode and a second type of the first dummy electrode, wherein the first type of the first dummy electrode is disposed in the first metal grid layer, is located between adjacent first touch electrodes, and is coupled to a first part of the second touch electrode in parallel

Assignees

• Hefei Xinsheng Optoelectronics Technology Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Xu Jiawei
• Li Bisheng
• Xie Taofeng
• Fan Wenjin

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

• G06F2203/04112

  Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material · CPC title

• G06F3/0448

  Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality · CPC title

• G06F3/0446 Primary

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

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title