TOUCH PANEL STRUCTURE AND FLEXIBLE TOUCH DISPLAY DEVICE

• US 20200133435A1
• Filed: 02/11/2018
• Published: 04/30/2020
• Est. Priority Date: 01/25/2018
• Status: Active Grant

• Current Assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Ltd.
• Original Assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Ltd.
• Inventors: LIU, Minlun, DAI, Qibing, LIN, Dan
• Granted Patent: US 10,768,763 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 2203/04102 Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• 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 3/0412 Digitisers structurally integrated in a display
• 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

Abstract

The present disclosure provides a touch panel structure and a flexible touch display device. The touch panel structure includes a plurality of first touch electrode chains and a plurality of second touch electrode chains insulated from and in cross-connection with the first touch electrode chains; each of the first touch electrode chains includes a plurality of spaced-apart first touch electrodes, and the adjacent two of the first touch electrodes are electrically connected through the first connecting portion, the first connecting portion includes at least two conductive bridges; two adjacent second touch electrodes are electrically connected through a second connecting portion, and the first connecting portion is stacked on the second connecting portion and insulated from the second connecting portion. The touch panel structure can not only increase the contact area between the first connection portion and the corresponding touch electrode but also reduce the contact resistance.

Claims

1. A touch panel structure, comprising:

a plurality of first touch electrode chains, wherein the plurality of the first touch electrode chains are arranged at intervals, each of the first touch electrode chains comprises a plurality of spaced first touch electrodes, two adjacent first touch electrodes are electrically connected by a first connecting portion, and the first connecting portion comprises at least two conductive bridges;

a plurality of second touch electrode chains, wherein the plurality of the second touch electrode chains are arranged at intervals, the second touch electrode chains are cross-insulated from the first touch electrode chains;

each of the second touch electrode chains comprises a plurality of spaced second touch electrodes, two adjacent second touch electrodes are electrically connected through a second connecting portion, the first connecting portion is stacked on the second connecting portion and insulated from the second connecting portion.

2. The touch panel structure according to claim 1, wherein an insulating block is provided between the second connecting portion and the first connecting portion stacked on the second connecting portion;

two ends of each of the conductive bridges respectively contact with the two adjacent first touch electrodes through a via hole passing through the insulating block.

3. The touch panel structure according to claim 2, wherein each of the conductive bridges is provided with a plurality of middle openings.

4. The touch panel structure according to claim 3, wherein each of the via holes on a same side of the first connecting portion is not on a same straight line parallel to the second touch electrode chain.

5. The touch panel structure according to claim 4, wherein the at least two conductive bridges are parallel to each other, and two adjacent conductive bridges are connected by a connecting strap.

6. The touch panel structure according to claim 5, wherein each of the connecting straps is not on the same straight line parallel to the second touch electrode chain.

7. The touch panel structure according to claim 4, wherein the at least two conductive bridges are cross-connected to each other.

8. The touch panel structure according to claim 1, wherein the second connecting portion extends from the second touch electrode itself.

9. The touch panel structure according to claim 1, wherein a bridge length direction of the conductive bridge is consistent with a bending axis direction of the touch panel.

10. A flexible touch display device comprising the touch panel structure according to claim 1.

11. A touch panel structure, comprising:

a plurality of first touch electrode chains, wherein the plurality of the first touch electrode chains are arranged at intervals, each of the first touch electrode chains comprises a plurality of spaced first touch electrodes, two adjacent first touch electrodes are electrically connected by a first connecting portion, and the first connecting portion comprises at least two conductive bridges;

a plurality of second touch electrode chains, wherein the plurality of the second touch electrode chains are arranged at intervals, the second touch electrode chains are cross-insulated from the first touch electrode chains;

each of the second touch electrode chains comprises a plurality of spaced second touch electrodes, two adjacent second touch electrodes are electrically connected through a second connecting portion, the first connecting portion is stacked on the second connecting portion and insulated from the second connecting portion.

wherein an insulating block is provided between the second connecting portion and the first connecting portion stacked on the second connecting portion;

two ends of each of the conductive bridges respectively contact with the two adjacent first touch electrodes through a via hole passing through the insulating block;

wherein each of the conductive bridges is provided with a plurality of middle openings;

wherein each of the via holes on a same side of the first connecting portion is not on a same straight line parallel to the second touch electrode chain;

wherein the second connecting portion extends from the second touch electrode itself.

12. The touch panel structure according to claim 11, wherein the at least two conductive bridges are parallel to each other, and two adjacent conductive bridges are connected by a connecting strap.

13. The touch panel structure according to claim 12, wherein each of the connecting straps is not on the same straight line parallel to the second touch electrode chain.

14. The touch panel structure according to claim 11, wherein the at least two conductive bridges are cross-connected to each other.

15. The touch panel structure according to claim 11, wherein a bridge length direction of the conductive bridge is consistent with a bending axis direction of the touch panel.