Touch screen and touch display device

Patent metadata

Field	Value
Publication number	US-10754462-B2
Application number	US-201816135250-A
Country	US
Kind code	B2
Filing date	Sep 19, 2018
Priority date	Sep 27, 2017
Publication date	Aug 25, 2020
Grant date	Aug 25, 2020

Abstract

A touch screen and a touch display device are provided in the present disclosure. The touch screen includes a substrate; a touch electrode pattern on the substrate; an optical interrupting pattern on a side of the touch electrode pattern facing away from the substrate; wherein in an effective display region of a display screen, at least a portion of an orthographic projection of the optical interrupting pattern on the substrate falls into an orthographic projection of the touch electrode pattern on the substrate to form a plurality of overlapping regions spaced apart from each other.

First claim

What is claimed is:

1. A touch screen comprising:
a substrate;
a touch electrode pattern on the substrate;
an optical interrupting pattern on a side of the touch electrode pattern facing away from the substrate;
wherein in an effective display region of a display screen, at least a portion of an orthographic projection of the optical interrupting pattern on the substrate falls into an orthographic projection of the touch electrode pattern on the substrate to form a plurality of overlapping regions spaced apart from each other,
wherein in the effective display region, the orthographic projection of the optical interrupting pattern on the substrate falls into the orthographic projection of the touch electrode pattern on the substrate completely,
wherein the touch electrode pattern is a periodic pattern; an absolute value of a difference between a distance of two adjacent overlapping regions in a first direction and a first periodic distance of the touch electrode patterns in the first direction is not more than 50% of the first periodic distance; and an absolute value of a difference between a distance of two adjacent overlapping regions in a second direction and a second periodic distance of the touch electrode patterns in the second direction is not more than 50% of the second periodic distance.

2. The touch screen according to claim 1 , further comprising a non-display region, in which the orthographic projection of the touch electrode pattern on the substrate falls into the orthographic projection of the optical interrupting pattern on the substrate completely.

3. The touch screen according to claim 1 , wherein in the effective display region, the optical interrupting pattern comprises a first portion and a second portion, an orthographic projection of the first portion on the substrate falls into the orthographic projection of the touch electrode pattern on the substrate completely.

4. The touch screen according to claim 1 , wherein the first periodic distance is 15-60 μm, and the second periodic distance is 60-500 μm,
the distance between two adjacent overlapping regions in the first direction is 7.5-90 μm, and the distance between two adjacent overlapping regions in the second direction is 30-750 μm.

5. The touch screen according to claim 4 , wherein the optical interrupting pattern comprises a plurality of optical interrupting strips spaced apart in the second direction.

6. The touch screen according to claim 5 , wherein the optical interrupting strip is in a shape of a rectangle, a wave or a bow.

7. The touch screen according to claim 1 , wherein the touch electrode pattern comprises:
a plurality of first electrodes spaced apart in the first direction and extending in the second direction; and
a plurality of second electrode groups in a same layer with the plurality of first electrodes, each group of the second electrode groups being disposed between two adjacent first electrodes and comprising a plurality of second electrodes spaced apart in the second direction.

8. The touch screen according to claim 7 , wherein the plurality of the second electrodes of two adjacent second electrode groups are staggered.

9. The touch screen according to claim 1 , wherein the touch electrode pattern comprises:
a first touch electrode on the substrate;
an insulating layer on a side of the first touch electrode facing away from the substrate; and
a second touch electrode on a side of the insulating layer facing away from the substrate.

10. The touch screen according to claim 9 , wherein the first touch electrode comprises a plurality of first sub-electrodes spaced apart in the first direction and extending in the second direction; and the second touch electrode comprises a plurality of second sub-electrodes spaced apart in the second direction and extending in the first direction.

11. The touch screen according to claim 10 , wherein the first sub-electrode and the second sub-electrode are in a shape of a strip, a wave, a bow, or a block.

12. The touch screen according to claim 1 , wherein the touch electrode pattern is formed of indium tin oxide.

13. The touch screen according to claim 1 , wherein a surface of a side of the optical interrupting pattern facing away from the substrate is a curved surface.

14. The touch screen according to claim 1 , wherein the optical interrupting pattern is formed of an optical adhesive.

15. A touch display device, comprising:
the touch screen according to claim 1 ; and
a display screen stacked with the touch screen.

16. The touch display device according to claim 15 , wherein the touch display device is an On Cell touch display device or a One Glass Solution (OGS) touch display device.

17. The touch display device according to claim 16 , wherein the touch display device is an On Cell touch display device; the display screen comprises an array substrate, a color film substrate and a polarizer which are disposed in sequence; and the touch screen is disposed between the color film substrate and the polarizer, wherein the substrate of the touch screen is disposed close to the color film substrate.

18. The touch display device according to claim 16 , wherein the touch display device is an OGS touch display device, and the OGS touch display device comprises a protective cover on a side of the touch screen facing away from the display screen.

Assignees

• Boe Technology Group Co Ltd
• Chongqing Boe Optoelectronics Tech Co Ltd

Inventors

• Wu Junhui
• Bi Xin
• Guo Jiandong
• Wu Zhongshan

Classifications

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · 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

• G02B5/201

  in the form of arrays · CPC title

• G06F3/042

  by opto-electronic means · CPC title