Electrode array of touch panel

• US 8,803,019 B2
• Filed: 07/25/2012
• Issued: 08/12/2014
• Est. Priority Date: 05/25/2012
• Status: Active Grant

• Current Assignee: Chunghwa Picture Tubes Limited
• Original Assignee: Chunghwa Picture Tubes Limited
• Inventors: Chang, Chih-chao, Hsu, Chao-yong, Huang, Shih-hung, Chen, Hung-hsiang
• Primary Examiner(s): Luebke, Renee
• Assistant Examiner(s): CAROC, LHEIREN MAE ANGLO
• Application Number:
  US13/557,225
• Publication Number:
  US 20130313098A1
• Time in Patent Office: 748 Days
• Field of Search: 200/600
• US Class Current: 200/600
• CPC Class Codes: G06F 2203/04111 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 Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: H03K 17/9622 using a plurality of detectors, e.g. keyboard
• CPC Class Codes: H03K 2017/9602 characterised by the type or shape of the sensing electrodes

Abstract

Disclosure is an electrode array of a touch panel, which includes a plurality of rhombus-shaped electrodes, dumbbell-shaped electrodes, and bridge wires. The rhombus-shaped electrodes are arranged along a first direction and interconnected in the first direction. The dumbbell-shaped electrodes are arranged along a second direction. Each dumbbell-shaped electrode has a first enlarged part, a second enlarged part, and a narrow part. Here, each rhombus-shaped electrode is disposed between two adjacent dumbbell-shaped electrodes along the second direction. The bridge wires are used for electrically coupling the two first enlarged parts and the two second enlarged parts of the two adjacent dumbbell-shaped electrodes, respectively. The production reliability of the present invention is increased according to the dumbbell-shaped electrodes.

Claims

1. An electrode array of a touch panel, comprising:

a plurality of rhombus-shaped electrodes arranged along a first direction and interconnected in the first direction;

a plurality of dumbbell-shaped electrodes arranged along a second direction, each of the dumbbell-shaped electrodes having a first enlarged part, a second enlarged part, and a narrow part connecting between the first enlarged part and the second enlarged part, each rhombus-shaped electrode being disposed between two adjacent ones of the dumbbell-shaped electrodes along the second direction;

a plurality of bridge wires for electrically coupling the two first enlarged parts of the two adjacent dumbbell-shaped electrodes and electrically coupling the two second enlarged parts of the two adjacent dumbbell-shaped electrodes, respectively; and

a plurality of point discharge components, the point discharge components being disposed on edges of the rhombus-shaped electrodes and edges of the first enlarged parts and the second enlarged parts of the dumbbell-shaped electrodes.

2. The electrode array of a touch panel of claim 1, wherein each bridge wire staggers a connection between two of the rhombus-shaped electrodes and is insulated from the connection between the two rhombus-shaped electrodes.

3. The electrode array of a touch panel of claim 1, wherein a shape of each of the first enlarged part and the second enlarged part is an isosceles triangle.

4. The electrode array of a touch panel of claim 3, wherein a shape of the narrow part is a strip, and the strip is coupled between two vertices of the isosceles triangles.

5. The electrode array of a touch panel of claim 1, wherein the first direction is perpendicular to the second direction.

6. The electrode array of a touch panel of claim 1, wherein the first direction is a sensing direction of the touch panel, and the second direction is a driving direction of the touch panel.

7. The electrode array of a touch panel of claim 6, wherein a sensing line is formed by the rhombus-shaped electrodes arranged along the first direction, and a driving line is formed by the dumbbell-shaped electrodes arranged along the second direction.

8. The electrode array of a touch panel of claim 1, wherein the first direction is a driving direction of the touch panel, and the second direction is a sensing direction of the touch panel.

9. The electrode array of a touch panel of claim 8, wherein a driving line is formed by the rhombus-shaped electrodes arranged along the first direction, and a sensing line is formed by the dumbbell-shaped electrodes arranged along the second direction.