Touch structure and manufacturing method thereof, display panel, and display device

Patent metadata

Field	Value
Publication number	US-12242686-B2
Application number	US-202218548339-A
Country	US
Kind code	B2
Filing date	Jul 27, 2022
Priority date	Aug 13, 2021
Publication date	Mar 4, 2025
Grant date	Mar 4, 2025

Abstract

A touch structure includes at least one touch functional layer group and at least one protective pad layer. The at least one touch functional layer group includes an organic layer and a conductive layer that are sequentially stacked. The at least one protective pad layer is arranged in one-to-one correspondence with the at least one touch functional layer group. A protective pad layer is located between a conductive layer and an organic layer of a corresponding touch functional layer group. An orthographic projection of the protective pad layer on the organic layer at least partially overlaps with an orthographic projection of the conductive layer on the organic layer.

First claim

What is claimed is:

1. A touch structure, comprising:
at least one touch functional layer group, the at least one touch functional layer group including an organic layer and a conductive layer that are sequentially stacked, wherein the at least one touch functional layer group includes:
a first touch functional layer group including a first organic layer and a first conductive layer that are sequentially stacked; and
a second touch functional layer group disposed on a side of the first conductive layer away from the first organic layer, the second touch functional layer group including a second organic layer and a second conductive layer that are sequentially stacked; and

at least one protective pad layer arranged in one-to-one correspondence with the at least one touch functional layer group, wherein a protective pad layer of the at least one protective pad layer is located between a conductive layer and an organic layer of a corresponding touch functional layer group, and an orthographic projection of the protective pad layer on the organic layer of the corresponding touch functional layer group at least partially overlaps with an orthographic projection of the conductive layer of the corresponding touch functional layer group on the organic layer of the corresponding touch functional layer group;
wherein a material of the protective pad layer includes an inorganic material;
wherein the at least one protective pad layer is arranged corresponding to the first conductive layer and/or the second conductive layer, and an orthographic projection of the protective pad layer on the first organic layer at least partially overlaps an orthographic projection of a corresponding conductive layer on the first organic layer;
wherein the orthographic projection of the protective pad layer on the first organic layer approximately coincides with the orthographic projection of the corresponding conductive layer on the first organic layer; or
the orthographic projection of the protective pad layer on the first organic layer is a closed shape, and the orthographic projection of the corresponding conductive layer on the first organic layer is located within a boundary of the closed shape;
wherein the touch structure has a touch region and a bonding region located on a side of the touch region; and
the orthographic projection of the protective pad layer on the first organic layer and the bonding region are staggered.

2. The touch structure according to claim 1 , wherein a thickness of a conductive layer in the first conductive layer and the second conductive layer that is arranged corresponding to the protective pad layer is greater than or equal to 0.3 μm.

3. The touch structure according to claim 2 , wherein one of the first conductive layer and the second conductive layer is arranged corresponding to the protective pad layer, and the thickness of the conductive layer that is arranged corresponding to the protective pad layer is greater than a thickness of another of the first conductive layer and the second conductive layer.

4. The touch structure according to claim 3 , wherein a thickness of one of the first conductive layer and the second conductive layer that is arranged corresponding to no protective pad layer is less than 0.3 μm.

5. The touch structure according to claim 1 , further comprising:
a plurality of touch units disposed in the touch region and including a plurality of first touch units and a plurality of second touch units, wherein each first touch unit extends along a first direction, and the plurality of first touch units are arranged side by side along a second direction, the second direction and the first direction intersecting; each second touch unit extends along the second direction, and the plurality of second touch units are arranged side by side along the first direction;
the first touch unit includes a plurality of first touch electrodes and a plurality of first connection portions, and two adjacent first touch electrodes are electrically connected to each other through a first connection portion;
the second touch unit includes a plurality of second touch electrodes and a plurality of second connection portions, and two adjacent second touch electrodes are electrically connected to each other through a second connection portion;
wherein the plurality of first touch electrodes, the plurality of second touch electrodes and the plurality of first connection portions are arranged in one of the first conductive layer and the second conductive layer, and the plurality of second connection portions are arranged in another of the first conductive layer and the second conductive layer; or
the plurality of first touch electrodes, the plurality of second touch electrodes and the plurality of second connection portions are arranged in the one of the first conductive layer and the second conductive layer, and the plurality of first connection portions are arranged in the another of the first conductive layer and the second conductive layer.

6. The touch structure according to claim 5 , wherein the plurality of first touch electrodes, the plurality of second touch electrodes and the plurality of first connection portions are arranged in the same conductive layer, and a conductive layer where the plurality of second connection portions are located is arranged corresponding to the protective pad layer; or
the plurality of first touch electrodes, the plurality of second touch electrodes and the plurality of second connection portions are arranged in the same conductive layer, and a conductive layer where the plurality of first connection portions are located is arranged corresponding to the protective pad layer.

7. The touch structure according to claim 5 , further comprising:
a plurality of auxiliary electrodes, wherein the plurality of first touch electrodes and the plurality of second touch electrodes are arranged in one of the first conductive layer and the second conductive layer, and the plurality of auxiliary electrodes are arranged in another of the first conductive layer and the second conductive layer;
an orthographic projection of each auxiliary electrode on the first organic layer at least partially overlaps an orthographic projection of a first touch electrode of the plurality of first touch electrodes or a second touch electrode of the plurality of second touch electrodes on the first organic layer; and the auxiliary electrode is electrically connected to the first touch electrode or the second touch electrode through via boles in the second organic layer.

8. A display panel, comprising:
a display substrate; and
the touch structure according to claim 1 , the touch structure being disposed on a light-exit side of the display substrate.

9. The display panel according to claim 8 , wherein the display substrate includes an encapsulation layer, and the touch structure is directly disposed on the encapsulation layer.

10. A display device, comprising the display panel according to claim 8 .

11. The touch structure according to claim 1 , wherein the at least one protective pad layer includes a first protective pad layer and/or a second protective pad layer;
the first protective pad layer is arranged corresponding to the first conductive layer, and is located between the first conductive layer and the first organic layer; and
the second protective pad layer is arranged corresponding to the second conductive layer, and is located between the second conductive layer and the second organic layer.

12. The touch structure according to claim 1 , wherein a surface of the protective pad layer close to a corresponding conductive layer has a plurality of depressions, and

Assignees

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

Inventors

• Wang Yu
• Cui Guoyi
• Gao Tao
• Li Zeliang

Classifications

• G06F2203/04107

  Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds · CPC title

• H10K59/40 Primary

  OLEDs integrated with touch screens · CPC title

• H10K59/1201

  Manufacture or treatment · 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