Touch screen and touch positioning method thereof, and display device

1. A touch screen comprising a plurality of mutually insulated fan-shaped first touch sensing electrodes, a plurality of mutually insulated and non-overlapped second touch sensing electrodes, a plurality of mutually insulated first touch sensing electrode wires and a plurality of mutually insulated second touch sensing electrode wires, the second touch sensing electrodes mutually insulated from the first touch sensing electrodes, the plurality of the first touch sensing electrodes arranged in a circle, each of the second touch sensing electrodes having a non-closed ring shape concentrically arranged with the circle, the plurality of mutually insulated first touch sensing electrode wires extending along a radial direction of the circle and electrically connected to the second touch sensing electrodes in a one-to-one correspondence, and the plurality of mutually insulated second touch sensing electrode wires electrically connected to the first touch sensing electrode wires in a one-to-one correspondence.

2. The touch screen according to claim 1 , further comprising a plurality of mutually insulated third touch sensing electrode wires electrically connecting to the first touch sensing electrodes in a one-to-one correspondence, and a touch control chip, each of the first touch sensing electrodes electrically connecting to the touch control chip via a corresponding one of the third touch sensing electrode wires, and said each of the second touch sensing electrodes electrically connecting to the touch control chip via a corresponding one of the first touch sensing electrode wires and a corresponding one of the second touch sensing electrode wires.

3. The touch screen according to claim 1 , wherein the touch screen is a dial of a watch.

4. A display device comprising the touch screen according to claim 1 .

5. A touch positioning method used in the touch screen according to claim 1 , the method comprising:

loading a touch scanning signal for each of the first touch sensing electrodes, and detecting a voltage signal of said each of the second touch sensing electrodes coupled to the touch scanning signal; or

loading a touch scanning signal for said each of the second touch sensing electrodes, and detecting a voltage signal of each of the first touch sensing electrodes coupled to the touch scanning signal.

6. The touch screen according to claim 2 , wherein:

the first touch sensing electrodes and the second touch sensing electrodes are arranged in the same layer;

said each of the first touch sensing electrodes comprises a plurality of touch sensing sub-electrodes arranged along a radial direction and non-overlapping with the second touch sensing electrodes; and

the touch screen further comprises an electrical bridge configured to electrically connect two adjacent touch sensing sub-electrodes in said each of the first touch sensing electrodes.

7. The touch screen according to claim 2 , wherein the first touch sensing electrodes and the second touch sensing electrodes are arranged in different layers, and wherein the touch screen further comprises an insulating layer arranged between the first touch sensing electrodes and the second touch sensing electrodes.

8. The touch screen according to claim 2 , wherein:

said each of the second touch sensing electrodes defines an opening that aligns with the radial direction of the circle; and

one end of said each of the second touch sensing electrodes electrically connects to a corresponding one of the first touch sensing electrode wires.

9. The touch screen according to claim 2 , wherein:

said each of the second touch sensing electrodes defines an opening that does not align with the radial direction of the circle;

said each of the second touch sensing electrodes comprises a plurality of touch sensing sub-electrodes arranged along a circumferential direction of the non-closed ring and non-overlapping with each of the first touch sensing electrode wires; and

the touch screen further comprises an electrical bridge configured to electrically connect two adjacent touch sensing sub-electrodes in said each of the second touch sensing electrodes.

10. The touch screen according to claim 2 , wherein:

said each of the second touch sensing electrodes defines an opening that does not align with the radial direction of the circle;

each of the first touch sensing electrode wires comprises a plurality of touch sensing sub-electrode wires arranged along a radial direction of the circle and non-overlapping with said each of the second touch sensing electrodes; and

the touch screen further comprises an electrical bridge configured to electrically connect two adjacent touch sensing sub-electrode wires in said each of the first touch sensing electrode wires.

11. The touch screen according to claim 2 , wherein:

each of the second touch sensing electrodes includes a first end and a second end; and

the first end of some of the second touch sensing electrodes connects to a corresponding one of the first touch sensing electrode wires, and the second end of the other ones of the second touch sensing electrodes connects to a corresponding one of the first touch sensing electrode wires.

12. The touch screen according to claim 2 , wherein said each of the first touch sensing electrodes, said each of the second touch sensing electrodes and each of the first touch sensing electrode wires are positioned within a display area of the touch screen, and wherein said each of the first touch sensing electrodes, said each of the second touch sensing electrodes and said each of the first touch sensing electrode wires are transparent, and wherein said each of the third touch sensing electrode wires, each of the second touch sensing electrode wires and the touch control chip are positioned within a bezel area of the touch screen.

13. A display device comprising the touch screen according to claim 2 .

14. The touch screen according to claim 6 , wherein two adjacent first touch sensing electrodes define a space therebetween, and wherein the first touch sensing electrode wires are positioned in the space between the two adjacent first touch sensing electrodes.

15. A display device comprising the touch screen according to claim 6 .

16. A display device comprising the touch screen according to claim 7 .

17. The touch screen according to claim 11 , wherein the second touch sensing electrodes connected to the first touch sensing electrode wires via the first ends and the second touch sensing electrodes connected to the first touch sensing electrode wires via the second ends are arranged at intervals.

18. The touch screen according to claim 3 , wherein the first touch sensing electrodes are substantially equal in area.

19. The touch screen according to claim 3 , wherein a radius difference of two adjacent second touch sensing electrodes is substantially equal for each adjacent pair of the second touch sensing electrodes.

20. A display device comprising the touch screen according to claim 5 .