Touch Panel and Preparation Method thereof, and Display Touch Apparatus

Patent metadata

Field	Value
Publication number	US-2023168757-A1
Application number	US-202117916054-A
Country	US
Kind code	A1
Filing date	Nov 12, 2021
Priority date	Feb 24, 2021
Publication date	Jun 1, 2023
Grant date	—

Abstract

Disclosed is a touch panel including a planar region and a bent region located on at least one side of the planar region. The touch panel has at least one notch adjacent to the bent region. The touch panel includes at least one first touch peripheral region located around the at least one notch, and a light-transmitting first trace layer is provided in the at least one first touch peripheral region.

First claim

1 . A touch panel comprising:
a planar region and a bent region located on at least one side of the planar region; wherein the touch panel has at least one notch adjacent to the bent region; the touch panel comprises at least one first touch peripheral region located around the at least one notch, and a light-transmitting first trace layer is provided in the at least one first touch peripheral region.

2 . The touch panel according to claim 1 , wherein the planar region has multiple corner regions, and the at least one notch is located at a periphery of at least one corner region of the planar region.

3 . The touch panel according to claim 2 , wherein the planar region is approximately in a shape of a rounded rectangle, bent regions are provided on four sides of the planar region, and a notch is provided between bent regions on adjacent two sides.

4 . The touch panel according to claim 1 , wherein an edge of the touch panel corresponding to the at least one notch comprises a first straight line segment, a circular arc segment, and a second straight line segment connected sequentially, or an edge of the touch panel corresponding to the at least one notch comprises a first straight line segment, a first transition segment, a circular arc segment, a second transition segment, and a second straight line segment connected sequentially; an extension direction of the first straight line segment intersects an extension direction of the second straight line segment.

5 . The touch panel according to claim 1 , wherein the first touch peripheral region around the at least one notch is partially overlapped with the planar region and is partially overlapped with the bent region adjacent to the at least one notch.

6 . The touch panel according to claim 1 , further comprising at least one second touch peripheral region that is at least partially overlapped with at least one bent region, a second trace layer is provided in the at least one second touch peripheral region, and the second trace layer and the first trace layer are of a different-layer structure; and
the first trace layer in the first touch peripheral region is electrically connected with a second trace layer in an adjacent second touch peripheral region.

7 . The touch panel according to claim 6 , further comprising a touch region that is partially overlapped with both the planar region and the at least one bent region;
wherein multiple first touch units and multiple second touch units are disposed in the touch region; at least one first touch unit comprises multiple first touch electrodes and multiple first connecting portions arranged sequentially along a first direction; at least one second touch unit comprises multiple second touch electrodes and multiple second connecting portions arranged sequentially along a second direction; the first direction intersects the second direction.

8 . The touch panel according to claim 7 , wherein the multiple first touch electrodes, the multiple second touch electrodes, and the multiple first connecting portions are disposed on a touch layer in a homo-layered manner, the multiple second connecting portions are disposed on a bridging layer, and a second connecting portion is interconnected with an adjacent second touch electrode through a via on a touch insulation layer between the bridging layer and the touch layer; or
the multiple first touch electrodes, the multiple second touch electrodes, and the multiple second connecting portions are disposed on a touch layer in a homo-layered manner, the multiple first connecting portions are disposed on a bridging layer, and a first connecting portion is interconnected with an adjacent first touch electrode through a via on a touch insulation layer between the bridging layer and the touch layer.

9 . The touch panel according to claim 8 , wherein the first trace layer and the touch layer are of a same-layer structure, and the second trace layer and the bridging layer are of a same-layer structure.

10 . The touch panel according to claim 7 , wherein the second trace layer in the at least one second touch peripheral region comprises at least one of following: multiple first touch leads and multiple second touch leads; a first touch lead is connected with a first touch unit, and a second touch lead is connected with a second touch unit; and
the first trace layer in the at least one first touch peripheral region comprises multiple lead connecting lines, and at least one of the multiple lead connecting lines is configured to be connected with a first touch lead or a second touch lead in the adjacent second touch peripheral region.

11 . The touch panel according to claim 10 , wherein the multiple lead connecting lines of the first trace layer have connecting end portions, and connecting end portions of adjacent lead connecting lines are arranged in a staggered manner.

12 . The touch panel according to claim 6 , wherein a ratio of a width of a same trace on the first trace layer to a width of the same trace on the second trace layer is approximately equal to a ratio of a surface resistance of a first conductive material used for the first trace layer to a surface resistance of a second conductive material used for the second trace layer.

13 . The touch panel according to claim 12 , wherein the first conductive material comprises a conductive material having a light transmittance greater than about 90%.

14 . The touch panel according to claim 12 , wherein the surface resistance of the first conductive material is about 10 Ω/m 2 .

15 . A display touch apparatus comprising a display panel and the touch panel according to claim 1 disposed on the display panel.

16 . The display touch apparatus according to claim 15 , wherein a touch base substrate of the touch panel is disposed on the display panel to form an Add on Mode structure;
or, an encapsulation layer of the display panel is used as a touch base substrate of the touch panel to form an On-Cell structure.

17 . (canceled)

18 . The display touch apparatus according to claim 15 , wherein at least one corner region of a planar region of the touch panel has a circular arc-shaped edge, and the circular arc-shaped edge of the corner region faces a circular arc-shaped edge of the display panel.

19 . The display touch apparatus according to claim 15 , wherein an orthographic projection of at least one notch of the touch panel on the display panel is partially overlapped with a display region of the display panel.

20 . A preparation method of a touch panel, wherein the touch panel comprises a planar region and a bent region located on at least one side of the planar region; the touch panel has at least one notch adjacent to the bent region;
the preparation method comprises: forming a light-transmitting first trace layer in at least one first touch peripheral region located around the at least one notch.

21 . The preparation method according to claim 20 , further comprising forming a second trace layer in a second touch peripheral region that is at least partially overlapped with at least one bent region, a first trace layer in the first touch peripheral region being electrically connected with a second trace layer in an adjacent second touch peripheral region.

Assignees

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

Inventors

• Wu Zhangmin
• He Xinglong
• Fang Changshuai

Classifications

• 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

• G06F3/0446

  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

• G06F2203/04103

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

• G06F3/044

  by capacitive means · CPC title