Metal mesh, touch display device and method for reducing moire pattern in touch display device

Patent metadata

Field	Value
Publication number	US-10705665-B2
Application number	US-201816337686-A
Country	US
Kind code	B2
Filing date	Jun 22, 2018
Priority date	Aug 31, 2017
Publication date	Jul 7, 2020
Grant date	Jul 7, 2020

Abstract

A metal mesh, a touch display device, and a method for reducing moire pattern in a touch display device are provided. The metal mesh includes at least two first metal lines which are arranged in parallel and separated from one another, and at least two second metal lines which are arranged in parallel and separated from one another and intersect the at least two first metal lines. The first metal lines and the second metal lines have a width of 1-6 μm, an the intersection angle between the first metal lines and the second metal lines is 66-70 degrees, and a distance between two neighboring first metal lines and a distance between two neighboring second metal lines are 160-170 μm or 200-210 μm.

First claim

What is claimed is:

1. A metal mesh, comprising:
at least two first metal lines which are in parallel with one another and separated from one another; and
at least two second metal lines which are in parallel with and separated from one another, and intersect the at least two first metal lines,
wherein the first metal lines and the second metal lines have a width of 1 μm-6 μm,
wherein an intersection angle between the first metal lines and the second metal lines is 66 degrees-70 degrees,
wherein a distance between two neighboring first metal lines and a distance between two neighboring second metal lines are 200 μm-210 μm,
wherein the at least two first metal lines and the at least two second metal lines intersect to form at least one rhombus, and
wherein the at least one rhombus has an acute angle between 66 degrees to 70 degrees, and the at least one rhombus has a height of 210 μm.

2. The metal mesh of claim 1 , wherein the first metal lines and the second metal lines have a width of 1 μm-2 μm.

3. The metal mesh of claim 1 , wherein the first metal lines have a same width as the second metal lines.

4. A touch display device, comprising a touch module, wherein the touch module comprises touch electrodes which comprise the metal mesh of claim 1 .

5. The touch display device of claim 4 ,
wherein ones of the touch electrodes of the touch module comprise a drive electrode and a sense electrode which are stacked and insulated from each other, and
wherein the drive electrode and the sense electrode each have a stripe shape and intersect with each other.

6. The touch display device of claim 5 ,
wherein the drive electrode comprises a first metal mesh,
wherein the sense electrode comprises a second metal mesh,
wherein the first metal mesh comprises at least one first rhombus, and
wherein the second metal mesh comprises at least one second rhombus.

7. The touch display device of claim 6 ,
wherein the first rhombus and the second rhombus have a same shape and a same size, and
wherein an orthographic projection of vertexes of the first rhombus on the second metal mesh overlaps a center of symmetry of the second rhombus.

8. The touch display device of claim 4 , further comprising:
a display module,
wherein the display module comprises an array substrate, a color filter substrate and a polarizer,
wherein the display module and the touch module are stacked with each other, and
wherein the display module has a pixel density of 250-300 pixels per inch.

9. The touch display device of claim 8 , wherein the touch module is between the color filter substrate and the polarizer of the display module.

10. The touch display device of claim 8 , wherein the touch module is between the array substrate and the color filter substrate of the display module.

11. The touch display device of claim 8 , wherein the touch module is on a cover plate of the touch display device.

12. A method for improving moire pattern in a touch display device, comprising:
forming a touch electrode of the touch display device from the metal mesh of claim 1 .

13. The method of claim 12 , wherein the touch display device further comprises a display module, and the method further comprises:
arranging the display module with a pixel density of 250-300 pixels per inch.

Assignees

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

Inventors

• Xie Xiaodong
• Zhang Lei
• Wang Jing
• He Min
• Zhu Yu
• Zhong Tengfei

Classifications

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · 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

• G06F3/044

  by capacitive means · 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

• G06F3/0447 Primary

  Position sensing using the local deformation of sensor cells · CPC title