Touch electrode structure, touch panel and display device

• US 9,952,699 B2
• Filed: 12/18/2015
• Issued: 04/24/2018
• Est. Priority Date: 08/28/2015
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd., Chengdu BOE Optoelectronics Technology Company Limited (BOE Technology Group Co., Ltd.)
• Original Assignee: BOE Technology Group Co., Ltd., Chengdu BOE Optoelectronics Technology Company Limited (BOE Technology Group Co., Ltd.)
• Inventors: Long, Yue, Huang, Weiyun, Wang, Yang
• Primary Examiner(s): Mehmood, Jennifer
• Assistant Examiner(s): Neupane, Krishna P
• Application Number:
  US15/109,690
• Publication Number:
  US 20170235395A1
• Time in Patent Office: 858 Days
• Field of Search: None
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• 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: G06F 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens

Abstract

A touch electrode structure, a touch panel and a display device are provided. The touch electrode structure includes at least one first touch electrode (101) and a plurality of second touch electrodes (102), the at least one first touch electrode is of annular shape; the plurality of second touch electrodes (102) are insulated from the at least one first touch electrode (101), the plurality of second touch electrodes (102) are arranged along a circumferential direction of the annular first touch electrode (101) and extend along a radial direction of the annular first touch electrode (101), so as to overlap the at least one first touch electrode (101). The touch electrode structure may be used in a non-rectangular touch panel, which can solve a problem that an edge of the touch panel or the touch electrode at the corner is not completely or evenly covered.

Claims

1. A touch electrode structure, comprising at least one first touch electrode and a plurality of second touch electrodes, wherein,

the at least one first touch electrode is of annular shape;

the plurality of second touch electrodes are insulated from the at least one first touch electrode, the plurality of second touch electrodes are arranged along a circumferential direction of the annular first touch electrode and extend along a radial direction of the annular first touch electrode, so as to overlap the at least one first touch electrode,

wherein, the plurality of second touch electrodes include a first electrode group and a second electrode group, the first electrode group extends from an outermost ring to an innermost ring of the concentric rings and the second electrode group extends from the outermost ring to a middle ring of the concentric rings.

2. The touch electrode structure according to claim 1, comprising a plurality of first touch electrodes, wherein, each of the plurality of first touch electrodes is of annular shape, and the plurality of first touch electrodes are sequentially arranged to constitute a set of concentric rings, the plurality of first touch electrodes are insulated from each other, the plurality of second touch electrodes are arranged along a circumferential direction of the concentric rings and extend along a radial direction of the concentric rings, so as to overlap at least one on an outermost side in the plurality of first touch electrodes.

3. The touch electrode structure according to claim 2, wherein, the plurality of second touch electrodes are evenly arranged along the circumferential direction of the concentric rings.

4. The touch electrode structure according to claim 1, wherein, the plurality of second touch electrodes are evenly arranged along the circumferential direction of the concentric rings.

5. The touch electrode structure according to claim 1, further comprising a solid third touch electrode, wherein, the third touch electrode is located in a center of the annular first touch electrode, and is insulated from the respective first touch electrodes and the respective second touch electrodes.

6. The touch electrode structure according to claim 5, wherein, the third touch electrode overlaps one of the plurality of second touch electrodes.

7. The touch electrode structure according to claim 5, wherein, the third touch electrode does not overlap any one of the plurality of second touch electrodes.

8. The touch electrode structure according to claim 1, wherein, the annular shape includes a circular ring, an elliptical ring or a polygonal ring.

9. The touch electrode structure according to claim 8, wherein, the polygonal ring is a regular polygonal ring.

10. The touch electrode structure according to claim 1, wherein, the annular shape is closed or open.

11. The touch electrode structure according to claim 1, wherein, the first touch electrode is a touch driving electrode, and the second touch electrode is a touch sensing electrode;

or

the first touch electrode is a touch sensing electrode, and the second touch electrode is a touch driving electrode.

12. The touch electrode structure according to claim 1, further comprising a plurality of leads, wherein, the plurality of leads are respectively connected with the respective first touch electrodes and the respective second touch electrodes so as to be used for inputting/outputting a signal.

13. The touch electrode structure according to claim 1, wherein, a material of the at least one first touch electrode and/or the plurality of second touch electrodes is a transparent conductive material.

14. A touch panel, comprising the touch electrode structure according to claim 1.

15. A display device, comprising the touch electrode structure according to claim 1.

16. The display device according to claim 15, further comprising a display panel, wherein, the display panel includes the touch electrode structure.

17. The display device according to claim 15, further comprising a display panel and a touch panel disposed on a display side of the display panel, the touch panel including the touch electrode structure.

18. The display device according to claim 15, wherein, the display panel includes a liquid crystal display panel or an organic light emitting diode display panel.

19. The touch electrode structure according to claim 1, wherein, the second electrode group extends from the outermost ring to a same middle ring of the concentric rings.

20. The touch electrode structure according to claim 1, wherein, each of the second touch electrodes in the second electrode group is respectively located between the second touch electrodes in the first electrode group.