TOUCH PANEL

• US 20140184950A1
• Filed: 12/26/2013
• Published: 07/03/2014
• Est. Priority Date: 12/27/2012
• Status: Abandoned Application

• Current Assignee: Wintek Corporation
• Original Assignee: Wintek Corporation
• Inventors: Chu, Kuan-Yu, Huang, Chun-Cheng, Huang, Chen-Fu, Wang, Yu-Ching, Hwang, Chin-Pei, Chen, Ming-Wu, Liu, Chiu-Mei, Lin, Yan-Jun, Liu, Chia-Hung, Wang, Wen-Chun, Chang, Yu-Hung, Tsai, Lo-Hsien
• Application Number:
  US14/141,358
• Publication Number:
  US 20140184950A1
• Time in Patent Office: Days
• US Class Current: 349/12
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• 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 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

A touch panel, having a peripheral region, includes a first substrate, a touch-sensing structure, first outer traces, a first ground wire and an outer device. The first outer trace is electrically connected to the touch-sensing structure. The first outer traces extend to a connection region in the peripheral region. The first ground wire extends to the connection region, and the first ground wire has at least one discontinuous section in the connection region. The outer device is electrically connected to the first ground wire and the first outer traces in the connection region. The outer device electrically connects two ends of the discontinuous section of the first ground wire in the connection region, and the two ends of the discontinuous section of the first ground wire are electrically connected via the outer device.

Claims

1. A touch panel, having a peripheral region, the touch panel comprising:

a first substrate;

a touch-sensing structure, disposed on the first substrate;

a plurality of first outer traces, disposed in the peripheral region, wherein the first outer traces electrically are connected to the touch-sensing structure, and each of the first outer traces extends to a connection region in the peripheral region;

a first ground wire, disposed on the first substrate, wherein the first ground wire extends to the connection region, and the first ground wire has at least one discontinuous section in the connection region; and

an outer device electrically connected to the first ground wire and the first outer traces in the connection region, wherein the outer device electrically connects two ends of the discontinuous section of the first ground wire in the connection region, and the two ends of the discontinuous section of the first ground wire are electrically connected via the outer device.

2. The touch panel of claim 1, wherein the outer device has a plurality of bonding pads, each of the bonding pads is electrically connected to corresponding two ends of the discontinuous section of the first ground wire in the connection region so as to form the closed conductive path.

3. The touch panel of claim 1, wherein the touch-sensing structure comprises a plurality of first conductive series, disposed on the first substrate and extending along a first direction, wherein each of the first outer traces is electrically connected to one of the first conductive series.

4. The touch panel of claim 3, wherein the touch-sensing structure further comprises:

a plurality of second conductive series disposed on the first substrate and extending along a second direction, wherein the second direction and the first direction are crossed with each other; and

a plurality of second outer traces disposed in the peripheral region, wherein each of the second outer traces is electrically connected to one of the second conductive series, and each of the second outer traces extends to the connection region in the peripheral region.

5. The touch panel of claim 1, wherein the first ground wire disposed between the first outer traces and the second outer traces.

6. The touch panel of claim 4, further comprising a second ground wire disposed on the first substrate, wherein the second ground wire surrounds the first conductive series, the first outer traces, the second conductive series and the second outer traces.

7. The touch panel of claim 4, further comprising a third ground wire disposed between the first outer traces and the second conductive series.

8. The touch panel of claim 4, further comprising an insulating layer, wherein the first conductive series and the second conductive series are disposed on an identical surface of the first substrate, each of the first conductive series comprises a plurality of first electrodes and at least one first connection line, and the first connection line is used to electrically connect two adjacent first electrodes, wherein each of the second conductive series comprises a plurality of second electrodes and at least one second connection line, the second connection line is used to electrically connect two adjacent second electrodes, and the insulating layer is at least disposed between the first connection line and corresponding second connection line so as to electrically insulate the first conductive series from the second conductive series.

9. The touch panel of claim 8, wherein at least one of the first connection line and the second connection line comprises a metal line.

10. The touch panel of claim 1, wherein a length of the discontinuous section of the first ground wire is shorter than or equal to 5 millimeters.

11. The touch panel of claim 1, wherein the first ground wire comprises a contact pad disposed in the connection region, the contact pad is connected to two ends of the discontinuous section of the first ground wire so as to electrically connect the two ends of the discontinuous section of the first ground wire via the contact pad, and the outer device is electrically connected to the contact pad.

12. The touch panel of claim 1, further comprising a decoration layer, disposed on at least one side of the peripheral region.

13. The touch panel of claim 1, wherein two ends of each first outer trace are connected to two ends of one corresponding first conductive series respectively, the first outer traces connected to the two ends of each first conductive series extend to the connection region, and the outer device is electrically connected to the first outer traces, wherein each of the first outer traces, the corresponding first conductive series and the outer device in the connection region form a closed conductive path on the first substrate.

14. The touch panel of claim 1, further comprising a sensing unit disposed in the peripheral region, wherein the sensing unit comprises at least one sensing component and one sensing trace electrically connected to the sensing component, the sensing trace extends to the connection region, and the outer device is electrically connected to the sensing trace in the connection region.

15. The touch panel of claim 14, wherein the sensing component comprises a proximity sensor wire or a near field communication (NFC) component.

16. The touch panel of claim 14, further comprising an antenna structure, wherein the second ground wire is disposed between the antenna structure and the first outer traces, and the second ground wire is disposed between the antenna structure and the sensing trace.

17. The touch panel of claim 4, further comprising a third ground wire, disposed between the first outer traces and the second conductive series, wherein the outer device is electrically connected to the third ground wire in the connection region.

18. A touch panel, having a peripheral region, the touch panel comprising:

a first substrate;

a plurality of first conductive series, disposed on the first substrate and extending along a first direction;

a plurality of first outer traces, disposed in the peripheral region, wherein two ends of each first outer trace are connected to two ends of one corresponding first conductive series respectively, and the first outer traces extend to a connection region in the peripheral region;

a plurality of second conductive series, disposed on the first substrate and extending along a second direction, wherein the first direction and the second direction are crossed with each other;

a plurality of second outer traces, disposed in the peripheral region, wherein two ends of each second conductive series are respectively connected to two of the second outer traces extending to the connection region; and

an outer device electrically connected to the first outer traces and the second outer traces respectively, wherein each first outer trace, one corresponding first conductive series and the outer device in the connection region form a first closed conductive path on the first substrate, and two second outer traces connected to one identical second conductive series are electrically connected to the outer device in the connection region, wherein each second conductive series and the two corresponding second outer traces form a second closed conductive path in the outer device.

19. The touch panel of claim 18, wherein the outer device comprises:

a plurality of first upper layer traces, wherein each of the first upper layer traces is electrically connected to one of the first outer traces;

a plurality of second upper layer traces, wherein each of the second upper layer traces is electrically connected to one of the second outer traces; and

a plurality of first lower layer traces, wherein each of the first lower layer traces is electrically connected to two of the second upper layer traces, and the first lower layer traces are electrically insulated from the first upper layer traces, wherein each second conductive series, the two second outer traces connected with the second conductive series, two of the second upper layer traces and one of the first lower layer traces form the second closed conductive path.

20. The touch panel of claim 18, wherein the outer device comprises a flexible printed circuit (FPC) having a multiple-layered circuit structure.

21. The touch panel of claim 18, wherein each first conductive series and one corresponding first outer trace form the first closed conductive path on the first substrate, and the outer device is electrically connected to the first closed conductive path.

22. The touch panel of claim 18, wherein each of the first outer traces has a discontinuous section in the connection region, and the outer device is electrically connected to two ends of each discontinuous section of the first outer trace in the connection region so as to form the first closed conductive path.

23. The touch panel of claim 22, wherein a length of each discontinuous section of the first outer trace is shorter than or equal to 5 millimeters.

24. The touch panel of claim 22, wherein each of the first outer traces comprises a contact pad disposed in the connection region, each of the contact pads is connected to two ends of each discontinuous section of the first outer trace so as to form a closed conductive path on the first substrate by each first outer trace and the corresponding first conductive series, and the outer device is electrically connected to each of the contact pads.

25. The touch panel of claim 18, further comprising a first ground wire disposed on the first substrate, wherein the first ground wire is disposed between the first outer traces and the second outer traces.

26. The touch panel of claim 18, further comprising a second ground wire disposed on the first substrate, wherein the second ground wire surrounds the first conductive series, the first outer traces, the second conductive series and the second outer traces.

27. The touch panel of claim 25, wherein the first ground wire extends to the connection region, and the first ground wire has at least one discontinuous section in the connection region, wherein the outer device is electrically connected to two ends of the discontinuous section of the first ground wire in the connection region so as to electrically connect the two ends of the discontinuous section of the first ground wire via the outer device.

28. The touch panel of claim 27, wherein the first ground wire comprises a contact pad disposed in the connection region, the contact pad is connected to two ends of the discontinuous section of the first ground wire so as to electrically connect the two ends of the discontinuous section of the first ground wire via the contact pad, and the outer device is electrically connected to the contact pad.

29. The touch panel of claim 18, further comprising an insulating layer, wherein the first conductive series and the second conductive series are disposed on an identical surface of the first substrate, each of the first conductive series comprises a plurality of first electrodes and at least one first connection line, and the first connection line is used to electrically connect two adjacent first electrodes, wherein each of the second conductive series comprises a plurality of second electrodes and at least one second connection line, the second connection line is used to electrically connect two adjacent second electrodes, and the insulating layer is at least disposed between the first connection line and corresponding second connection line so as to electrically insulate the first conductive series from the second conductive series.

30. The touch panel of claim 18, further comprising a decoration layer, disposed on at least one side of the peripheral region.

31. The touch panel of claim 18, wherein the outer device comprises a flexible printed circuit (FPC) having a plurality of bonding pads corresponding to the connection region.