TOUCH PANNEL

• US 20140027264A1
• Filed: 07/23/2013
• Published: 01/30/2014
• Est. Priority Date: 07/24/2012
• Status: Active Grant

• Current Assignee: TPK Touch Solutions (Xiamen) Inc. (TPK Holding Co., Ltd.)
• Original Assignee: TPK Touch Solutions (Xiamen) Inc. (TPK Holding Co., Ltd.)
• Inventors: Yu, Jing, Chiu, Tsung-Ke, Lin, Yan, Xu, Quanfu
• Granted Patent: US 9,203,403 B2
• Time in Patent Office: Days
• 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 17/962 Capacitive touch switches

Abstract

The touch panel comprises a plurality of first axial electrodes extending along a first direction and a plurality of second axial electrodes extending along a second direction. The second axial electrode comprises a plurality of second axial conductive units and a plurality of bridging structures connecting with two adjacent second axial conductive units electrically. The bridging structure comprises a conductive component and an insulating component. The insulating component disposed between the conductive component and the first axial electrode. The conductive component comprises a connection portion and two contact portions, the two contact portions are respectively disposed on both ends of the insulating component and contact their corresponding second axial conductive units. The connection portion is electrically connected with the two contact portions, while the length of the connection portion along the first direction is less than the lengths of the contact portions along the first direction.

Claims

1. A touch panel, comprising:

a plurality of first axial electrodes, extending along a first direction;

a plurality of second axial electrodes, extending along a second direction, wherein each second axial electrode comprises a plurality of second axial conductive units and at least a bridging structure connecting between two adjacent second axial conductive units electrically;

wherein the bridging structure comprises a conductive component and an insulating component, the insulating component being disposed between the conductive component and the first axial electrode to perform electrical insulation;

wherein the conductive component comprises at least one connection portion and two contact portions, the two contact portions being respectively disposed on both ends of the insulating component and contacting their corresponding second axial conductive units, and the connection portion being electrically connected with the two contact portions to make the two adjacent second axial conductive units connect electrically;

wherein the length of the connection portion along the first direction is less than the length of each contact portion along the first direction.

2. The touch panel of claim 1, wherein each end of the insulating component respectively comprises two corner portions.

3. The touch panel of claim 2, wherein at least one corner portion is covered by the contact portion.

4. The touch panel of claim 2, wherein the two contact portions are respectively lapped to both ends of the insulating component, without covering each corner portion.

5. The touch panel of claim 4, wherein the length of each contact portion along the first direction is less than the distance between two corner portions located at one end of the insulating component, and a projection of the insulating component on the contact portions covers the contact portions in the first direction.

6. The touch panel of claim 4, wherein the length of each contact portion along the first direction is larger than the distance between two corner portions located at one end of the insulating component, and a projection of the contact portion on the insulating component covers the insulating component in the first direction;

the length of the projection of contact portion along the second direction is less than the length of the insulating component along the second direction, and a projection of the insulating component on the contact portions covers the contact portions along the second direction.

7. The touch panel of claim 1, wherein the first axial electrode comprises a plurality of first axial conductive units and a plurality of first axial conductive wires connecting to two adjacent first axial conductive units electrically.

8. The touch panel of claim 7, wherein the insulating component is disposed on the first axial conductive wire.

9. The touch panel of claim 7, wherein the insulating component is disposed on at least one first axial inductive unit.

10. The touch panel of claim 1, wherein the length of the connection portion along the second direction is equal to or larger than the distance between the two internal sides of the two contact portions along the second direction.

11. The touch panel of claim 1, wherein the touch panel further comprises a substrate, and the first axial electrodes and the second axial conductive units are disposed on the substrate.

12. The touch panel of claim 1, wherein the touch panel further comprises a substrate, and the conductive component is disposed on the substrate.

13. The touch panel of claim 1, wherein the material of the connection portion is the same as the material of the contact portions.

14. The touch panel of claim 1, wherein the material of the connection portion is different from the material of the contact portions.