Electrode structure and display device

Patent metadata

Field	Value
Publication number	US-12386468-B2
Application number	US-202318338506-A
Country	US
Kind code	B2
Filing date	Jun 21, 2023
Priority date	Aug 1, 2022
Publication date	Aug 12, 2025
Grant date	Aug 12, 2025

Abstract

An electrode structure is provided. The electrode structure includes a first layer and a second layer. The first layer has a first wire, a second wire and an isolated wire, wherein the first wire is electrically connected to the second wire, and the isolated wire is electrically insulated from the first wire and the second wire. The second layer is disposed on the first layer and has a third wire, wherein the third wire is electrically connected to the first wire. In a top view of the electrode structure, the isolated wire is disposed between the first wire and the second wire.

First claim

What is claimed is:

1. An electrode structure, comprising:
a first conductive layer having a first conductive wire, a second conductive wire and a fourth conductive wire, wherein the first conductive wire is electrically connected to the second conductive wire, and the fourth conductive wire is electrically insulated from the first conductive wire and the second conductive wire; and
a second conductive layer disposed on the first conductive layer and having a third conductive wire, wherein the third conductive wire is electrically connected to the first conductive wire,
wherein in a top view of the electrode structure, the fourth conductive wire is disposed between the first conductive wire and the second conductive wire.

2. The electrode structure as claimed in claim 1 , wherein the first conductive wire and the second conductive wire extend along a first direction and are separated from each other in the first direction, and an extension direction of the fourth conductive wire is parallel to the first direction.

3. The electrode structure as claimed in claim 2 , wherein the first conductive wire and the second conductive wire are separated by a first distance, and the ratio of a length of the fourth conductive wire to the first distance is greater than or equal to 0.5, and less than or equal to 0.96.

4. The electrode structure as claimed in claim 3 , wherein the ratio is greater than or equal to 0.7 and less than or equal to 0.92.

5. The electrode structure as claimed in claim 1 , wherein the third conductive wire is electrically connected to the first conductive wire via a connection element, and a material of the third conductive wire is the same as a material of the connection element.

6. The electrode structure as claimed in claim 1 , wherein in the top view of the electrode structure, the fourth conductive wire has a bow profile.

7. The electrode structure as claimed in claim 1 , wherein the fourth conductive wire includes a first portion and two ends, the first portion is disposed between the two ends, an imaginary line passes through the two ends, and the first portion is offset from the imaginary line by a second distance, wherein the second distance is greater than or equal to 1 μm and less than or equal to 8 μm.

8. The electrode structure as claimed in claim 1 , wherein the second conductive layer further has an additional conductive wire and intersects with the fourth conductive wire, and the isolation fourth conductive wire comprises a first portion and a second portion, the first portion does not overlap with the additional conductive wire, the second portion overlaps with the additional conductive wire, and a width of the second portion is greater than a width of the first portion.

9. The electrode structure as claimed in claim 1 , wherein an edge portion of the fourth conductive wire has an arcuate profile.

10. The electrode structure as claimed in claim 1 , wherein the first conductive layer further has a fifth conductive wire electrically connected to the first conductive wire and the second conductive wire, and an extension direction of the fifth conductive wire is parallel to an extension direction of the fourth conductive wire.

11. The electrode structure as claimed in claim 10 , wherein the first conductive layer further has a sixth conductive wire electrically connected to the first conductive wire and the fifth conductive wire, and in the top view of the electrode structure, the sixth conductive wire is disposed between the third conductive wire and the fourth conductive wire.

12. The electrode structure as claimed in claim 11 , wherein an extension direction of the sixth conductive wire is parallel to an extension direction of the third conductive wire.

13. The electrode structure as claimed in claim 1 , wherein the second conductive layer further has a seventh conductive wire electrically connected to the second conductive wire, and the first conductive wire and the second conductive wire are disposed between the third conductive wire and the seventh conductive wire.

14. The electrode structure as claimed in claim 1 , wherein the second conductive layer further has a seventh conductive wire spaced apart from the third conductive wire, and the third conductive wire is electrically connected to the seventh conductive wire via the first conductive wire and the second conductive wire.

15. The electrode structure as claimed in claim 14 , wherein the electrode structure is configured to sense touch actions.

16. The electrode structure as claimed in claim 1 , further comprising an insulating layer disposed between the first conductive layer and the second conductive layer, wherein a thickness of the first conductive layer is less than a thickness of the insulating layer.

17. The electrode structure as claimed in claim 1 , wherein a first thickness of the first conductive layer is less than a second thickness of the second conductive layer.

18. The electrode structure as claimed in claim 17 , wherein a ratio of the first thickness to the second thickness is greater than or equal to 0.6 and less than 1.

19. The electrode structure as claimed in claim 1 , wherein the first conductive layer comprises four fourth conductive wires, an imaginary rectangle is formed by connecting center points of the four fourth conductive wires, and a portion of each four fourth conductive wires is offset towards a center of the imaginary rectangle.

20. A display device, comprising:
a display panel; and
an electrode structure, comprising:
a first conductive layer having a first conductive wire, a second conductive wire and a fourth conductive wire, wherein the first conductive wire is electrically connected to the second conductive wire, and the fourth conductive wire is electrically insulated from the first conductive wire and the second conductive wire; and
a second conductive layer disposed on the first conductive layer and having a third conductive wire, wherein the third conductive wire is electrically connected to the first conductive wire,
wherein in a top view of the electrode structure, the fourth conductive wire is disposed between the first conductive wire and the second conductive wire,
wherein the electrode structure is disposed on the display panel.

Assignees

• Innolux Corp

Inventors

• Wu Yuan-Lin
• Yueh Jui-Jen

Classifications

• G06F3/0446

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

• G06F2203/04107

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

• G06F3/147

  using display panels · CPC title