Touch film, touchscreen, and electronic device

Patent metadata

Field	Value
Publication number	US-2025278156-A1
Application number	US-202318700888-A
Country	US
Kind code	A1
Filing date	Oct 28, 2023
Priority date	Nov 29, 2022
Publication date	Sep 4, 2025
Grant date	—

Abstract

A touch film, a touchscreen, and an electronic device are provided. The touch film includes a touch electrode layer and a dielectric isolation layer. The touch electrode layer includes metal lines arranged in a cross manner to form mesh units. Fractures configured to divide the metal lines into a transmit electrode and a receive electrode are provided on the metal lines, and the transmit electrode and the receive electrode form a touch capacitor structure at each of the fractures. Each of two ends of the fracture in a first direction is adjacent to two sides of at least one of the mesh units, to electrically isolate mesh units on two sides.

First claim

1 . An electronic device, comprises a touchscreen, wherein the touchscreen comprises a light-emitting layer, a packaging layer, and a touch film, wherein the touch film, the packaging layer, and the light-emitting layer are sequentially stacked, wherein the touch film comprises a touch electrode layer and a dielectric isolation layer, wherein the touch electrode layer is located in the dielectric isolation layer, the touch electrode layer comprises a metal lines arranged in a cross manner to form a plurality of mesh units;
a plurality of fractures are provided on the metal lines, the plurality of fractures are configured to divide the metal lines into a transmit electrode and a receive electrode, and the transmit electrode and the receive electrode form a touch capacitor structure at each fracture of the fractures; and a first direction is perpendicular to a conduction direction of each fracture, each of two ends of the corresponding fracture in the first direction is adjacent to two sides of at least one of the mesh units, and the corresponding fracture is configured to electrically isolate mesh units on two sides in the conduction direction of the fracture.

2 . The electronic device according to claim 1 , wherein the fractures comprise first fractures, each of the first fractures is located between opposite vertex angles of at least two diagonally adjacent mesh units, the corresponding fracture is adjacent to the vertex angles, and a width of the corresponding first fracture in the first direction is within a range of 1 micrometer to 10 micrometers.

3 . The electronic device according to claim 1 , wherein the mesh units comprise first mesh units, the first mesh units are located at an edge of at least one of the transmit electrode or the receive electrode, and at least one vertex angle of each of the first mesh units is adjacent to the fractures.

4 . The electronic device according to claim 1 , wherein the mesh units comprise second mesh units, and side metal lines of the second mesh units are isolated from the fractures.

5 . The electronic device according to claim 1 , wherein the mesh units comprise third mesh units, the third mesh units are communicated with the fractures, and adjacent third mesh units are communicably coupled to each other.

6 . The electronic device according to claim 1 , wherein the transmit electrode comprises transmit modules, the receive electrode comprises receive modules, one or more the transmit modules and one or more of the receive modules are disposed in a staggered manner, a receive module is disposed between one or more pairs of adjacent transmit modules, the touch electrode layer comprises a first metal bridge, and the first metal bridge electrically connects at least two of the transmit modules.

7 . The electronic device according to claim 6 , wherein the first metal bridge spans one side of the receive module and is electrically connected to the adjacent transmit modules, and the receive module between the adjacent transmit modules is electrically isolated from the first metal bridge.

8 . The electronic device according to claim 1 , wherein the transmit electrode comprises a plurality of transmit modules, the receive electrode comprises a plurality of receive modules, one or more of the transmit modules and one or more of the receive modules are disposed in a staggered manner, a transmit module between one or more pairs of adjacent receive modules, the touch electrode layer comprises a second metal bridge, and the second metal bridge electrically connects one or more of the receive modules.

9 . The electronic device according to claim 8 , wherein the second metal bridge spans one side of the transmit module and is electrically connected to the adjacent receive modules, and the transmit module between the adjacent receive modules is electrically isolated from the second metal bridge.

10 . The electronic device according to claim 1 , wherein the transmit electrode and the receive electrode are in different layers in the dielectric isolation layer.

11 . The electronic device according to claim 10 , wherein the touch electrode layer comprises a first connection electrode, the transmit electrode comprises a transmit modules, the first connection electrode electrically connects at least two of the transmit modules, and the first connection electrode and the transmit electrode are located at a same layer.

12 . The electronic device according to claim 10 , wherein the touch electrode layer comprises a second connection electrode, the receive electrode comprises a receive modules, the second connection electrode electrically connects at least two of the receive modules, and the second connection electrode and the receive electrode are located at a same layer.

13 . (canceled)

14 . The electronic device according to claim 1 , wherein the light-emitting layer comprises a pixel definition layer, the pixel definition layer comprises a plurality of pixels, the plurality of pixels are arranged in a matrix manner, and the plurality of pixels are in a one-to-one correspondence with a plurality of mesh units in a light-emitting direction of the light-emitting layer.

15 . The electronic device according to claim 1 , wherein a projection of each pixel on a touch electrode layer in the light-emitting direction of the light-emitting layer falls within a mesh unit corresponding to the pixel, and a gap exists between a side metal line of the mesh unit and the projection that falls within the mesh unit.

16 . The electronic device according to claim 1 , wherein a spacing between adjacent pixels is greater than a width of a metal line of the metal lines.

17 . The electronic device according to claim 1 , wherein a first plane is perpendicular to the light-emitting direction of the light-emitting layer, and a spacing between the metal line and an edge of a pixel is within a range of 1 micrometer to 10 micrometers along the first plane.

18 . The electronic device according to claim 1 , wherein the light-emitting layer comprises an OLED light-emitting layer.

19 . (canceled)

20 . The electronic device according to claim 1 , wherein the electronic device comprises a foldable mobile phone, the foldable mobile phone comprises a display screen, and the display screen is a flexible foldable display screen.

21 . The electronic device according to claim 2 , wherein the transmit electrode comprises transmit modules, the receive electrode comprises receive modules, one or more of the transmit modules and one or more of the receive modules are disposed in a staggered manner, a receive module is disposed between one or more pairs of adjacent transmit modules, the touch electrode layer comprises a first metal bridge, and the first metal bridge electrically connects at least two of the transmit modules.

Assignees

• Huawei Tech Co Ltd

Inventors

• Chen Zesheng
• Zhang Junyong
• Wang Yao
• Tang Tao

Classifications

• H04M2201/38

  Displays · CPC title

• H04M1/0268

  including a flexible display panel · CPC title

• H04M1/0214

  Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position (combined with translation movement H04M1/0235) · 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

• G06F2203/04111

  Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate · CPC title