Touch substrate, display touch panel, and display device

Patent metadata

Field	Value
Publication number	US-12474797-B2
Application number	US-202118578762-A
Country	US
Kind code	B2
Filing date	Aug 23, 2021
Priority date	Aug 23, 2021
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

A touch substrate includes multiple touch electrodes and multiple touch leads, and has a touch region and a non-touch region. The touch electrodes are located in the touch region, and the touch leads are located in the non-touch region and provide signals for the touch electrodes. The touch substrate is divided into a flat region and a bending region(s) by a bending boundary. The touch substrate includes: a first side, a second side and a corner between the first side and the second side. The bending boundary substantially extends in the extension direction of the first edge and intersects with the second edge. A touch lead includes: a corner lead, an end of the corner lead is connected with a first lead portion, and the corner lead is completely located in the bending region and does not overlap with the bending boundary.

First claim

What is claimed is:

1 . A touch substrate, comprising a plurality of touch electrodes and a plurality of touch leads;
wherein the touch substrate comprises a touch region and a non-touch region, the plurality of touch electrodes are located in the touch region, and the plurality of touch leads are located in the non-touch region and configured to provide signals for the plurality of touch electrodes; the touch substrate comprises at least one bending boundary, and the touch substrate is divided into a flat region and a bending region located on at least one side of the flat region; the touch substrate comprises a first edge, a second edge adjacent to the first edge, and a corner between the first edge and the second edge; the at least one bending boundary is at least partially located in the touch region and extends to the non-touch region, and the at least one bending boundary substantially extends in an extension direction of the first edge and intersects with the second edge; and at least one touch lead among the plurality of touch leads comprises: a corner lead located in at least one corner in the touch substrate, and a first lead portion connected with an end of the corner lead; wherein the first lead portion substantially extends in an extension direction of the second edge, and the corner lead is completely located in the bending region and does not overlap the bending boundary; wherein the first lead portion comprises a first lead layer and a second lead layer which are disposed in a stacked manner, and in a region where the bending boundary overlaps the first lead portion, the second lead layer is electrically connected with the first lead layer.

2 . The touch substrate according to claim 1 , wherein the first lead portion is at least partially located in the bending region and overlaps the bending boundary.

3 . The touch substrate according to claim 1 , wherein the other end of the corner lead is connected with a second lead portion; wherein the second lead portion substantially extends in the extension direction of the first edge, and is completely located in the bending region and does not overlap the bending boundary.

4 . The touch substrate according to claim 3 , wherein the touch substrate further comprises a plurality of wiring terminals located in the non-touch region;
at least one of the plurality of touch leads comprises: two corner leads and two first lead portions; wherein the second lead portion is connected with the two corner leads; and one of the two first lead portions is electrically connected with one of the plurality of wiring terminals, and the other one of the two first lead portions is electrically connected with one of the plurality of touch electrodes.

5 . The touch substrate according to claim 1 , wherein the other end of the corner lead is electrically connected with one of the plurality of touch electrodes.

6 . The touch substrate according to claim 1 , wherein the touch substrate further comprises a third edge disposed opposite to the first edge; and
the touch substrate comprises: two bending boundaries close to the first edge and the third edge respectively; wherein the touch substrate is divided into a flat region and bending regions located on two opposite sides of the flat region.

7 . The touch substrate according to claim 6 , wherein the corner lead in at least one touch lead among the plurality of touch leads is located at a corner between the third edge and the second edge;
and/or
the corner lead is an arc lead, the first lead portion is a straight lead, and the second lead portion is a straight lead.

8 . The touch substrate according to claim 7 , wherein a boundary of the touch region and the non-touch region has an arc part, and a radius of the arc part is smaller than a radius of the corner lead.

9 . The touch substrate according to claim 1 , wherein the touch substrate further comprises a first insulating layer between the first lead layer and the second lead layer;
wherein the first insulating layer has a first via hole going through the first insulating layer along a thickness direction of the first insulating layer; and the bending boundary overlaps the first via hole, and the second lead layer is electrically connected with the first lead layer through the first via hole.

10 . The touch substrate according to claim 1 , wherein a bending angle of the bending region is greater than or equal to 80 degrees.

11 . A display touch panel, comprising:
a drive backplane, comprising a display region and a peripheral region surrounding the display region; a plurality of light emitting devices, located on a side of the drive backplane in the display region; a packaging layer, located on a side of the light emitting devices facing away from the drive backplane; and the touch substrate according to claim 1 , directly formed on the packaging layer.

12 . The display touch panel according to claim 11 , wherein the display region coincides with a touch region, and the display region comprises a plurality of pixels arranged in an array; and
a quantity N of pixel columns between an edge of the display region located in a flat region and a bending boundary closest to the display region, a bending radius r 1 of a corner lead closest to the display region, a pixel spacing P pixel , and a total thickness Total of the touch substrate meet a following condition:

N
=

π
×

(

r
⁢
1

-
Total

)

×
1000

P
pixel

.

13 . The display touch panel according to claim 12 , wherein the radius r 1 of the corner lead closest to the touch region is greater than or equal to 1.5 millimeters and smaller than or equal to 2.4 millimeters.

14 . A display apparatus, comprising the display touch panel according to claim 11 .

15 . The display apparatus according to claim 14 , further comprising:
a cover plate, attached to the display touch panel on a side of a touch substrate facing away from a drive backplane, wherein the cover plate has a bending region and a flat region same as the touch substrate.

16 . The display apparatus according to claim 15 , wherein when a first lead portion comprises a first lead layer and a second lead layer which are disposed in a stacked manner, and the first lead layer or the second lead layer comprises a first sub-lead portion and a second sub-lead portion which are disconnected at a bending boundary, a quantity n of pixel columns between the first sub-lead portion and the bending boundary, as well as the second sub-lead portion and the bending boundary meets the following condition:

n
=

(

A
+
W

Assignees

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

Inventors

• Fan Cong
• Dong Xiangdan
• He Fan
• Tong Kemeng

Classifications

• G06F3/0412

  Digitisers structurally integrated in a display · 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

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

• G06F3/0443

  using a single layer of sensing electrodes · CPC title

• G06F3/041

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title