TOUCH PANEL

• US 20150075959A1
• Filed: 09/17/2014
• Published: 03/19/2015
• Est. Priority Date: 09/17/2013
• Status: Active Grant

• Current Assignee: Wintek Corporation
• Original Assignee: Wintek Corporation
• Inventors: Lu, Chun-Cheng, Lu, Chia-Ching, Liu, Chin-Chang, Chang, Ting-Yu, Wang, Wen-Chun
• Granted Patent: US 9,626,052 B2
• Time in Patent Office: Days
• US Class Current: 200/5.R
• CPC Class Codes: G06F 2203/04106 Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection
• CPC Class Codes: G06F 2203/04108 Touchless 2D- digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface without distance measurement in the Z direction
• 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 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• 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

Abstract

A touch panel including a touch area and a peripheral area adjacent to the touch area is provided. The touch panel includes a plurality of first electrodes, a plurality of second electrodes, a plurality of third electrodes, a plurality of pads and a plurality of wirings. The first electrodes, the second electrodes and the third electrodes are located in the touch area and electrically insulated to each other, wherein the third electrodes expose at least a part of the first electrodes and at least a part of the second electrodes. The pads are located in the peripheral area. The first electrodes, the second electrodes and the third electrodes are electrically connected to the pads through the wirings respectively.

Claims

1. A touch panel, having touch area and a peripheral area adjacent to the touch area, the touch panel comprising:

a plurality of touch elements, at least located in the touch area;

a plurality of hovering touch elements, electrically isolated to the touch elements, and at least located in the touch area, wherein the hovering touch elements expose at least a part of the touch elements;

a plurality of pads, located in the peripheral area; and

a plurality of wirings, wherein the touch elements and the hovering touch elements are electrically connected to the pads through the wirings respectively.

2. The touch panel as claimed in claim 1, wherein the touch elements comprise a plurality of first electrodes and a plurality of second electrodes, the hovering touch elements comprise a plurality of third electrodes, and the third electrodes expose at least a part of the first electrodes and at least a part of the second electrodes, and the first electrodes, the second electrodes and the third electrodes are electrically connected to the pads through the wirings.

3. The touch panel as claimed in claim 2, wherein each of the first electrodes comprises a plurality of first electrode pads and a plurality of first connection lines, the first connections lines connect two adjacent first electrode pads in series along a first direction, each of the second electrodes comprises a plurality of second electrode pads and a plurality of second connection lines, the second connections lines cross over the corresponding first connection lines to connect two adjacent second electrode pads in series along a second direction, wherein the first electrode pads and the second electrode pads have a plurality of gaps there between, each of the third electrodes comprises a plurality of third connection lines, an orthogonal projection of each of the third connection lines in the touch area is located in the gaps, and each of the third connection lines at least crosses over one of the corresponding first connection line or the second connection line, such that at least a part of the third connection lines of each of the third electrodes are electrically connected.

4. The touch panel as claimed in claim 3, wherein the third electrodes are distributed in the touch area in an array.

5. The touch panel as claimed in claim 2, wherein each of the first electrodes is a first bar-shape electrode extending along a first direction, each of the second electrodes is a second bar-shape electrode extending along a second direction, and each of the third electrodes is located between two adjacent second electrodes or between two adjacent first electrodes.

6. The touch panel as claimed in claim 5, wherein the third electrodes are disposed in parallel to the first electrodes, or disposed in parallel to the second electrodes.

7. The touch panel as claimed in claim 2, wherein the first electrodes and the second electrodes are not overlapped to each other, and the first electrodes and the second electrodes have a plurality of gaps there between, and the third electrodes are located in the gaps and extend along the gaps.

8. The touch panel as claimed in claim 2, further comprising a substrate, wherein the first electrodes, the second electrodes and the third electrodes are located at a same side of the substrate.

9. The touch panel as claimed in claim 8, further comprising a first insulation layer, wherein the first insulation layer is at least disposed between the first electrodes and the second electrodes, and between the third electrodes and the first electrodes or the second electrodes.

10. The touch panel as claimed in claim 8, further comprising a first insulation layer and a second insulation layer, wherein the first insulation layer is disposed between the first electrodes and the second electrodes, and the second insulation layer is disposed between the second electrodes and the third electrodes.

11. The touch panel as claimed in claim 2, further comprising a first substrate and a second substrate disposed opposite to the first substrate, wherein the touch elements are disposed on the first substrate, and the hovering touch elements are disposed on the second substrate, and the second substrate is disposed at a side near a user.

12. The touch panel as claimed in claim 11, wherein the first electrodes and the second electrodes are disposed at a same side of the first substrate.

13. The touch panel as claimed in claim 2, further comprising a substrate, wherein the first electrodes and the second electrodes are disposed at two opposites sides of the first substrate, and the third electrodes are disposed on the first substrate at a side the same to that of the second electrodes or the first electrodes.

14. The touch panel as claimed in claim 1, further comprising a substrate, wherein the touch elements and the hovering touch elements are disposed at a same side of the substrate.

15. The touch panel as claimed in claim 14, wherein the first substrate is a substrate of a display.

16. The touch panel as claimed in claim 1, further comprising a first substrate and a second substrate disposed opposite to the first substrate, wherein the touch elements and the hovering touch elements are disposed on the first substrate, and are located between the second substrate and the first substrate, and the second substrate is disposed at a side near a user.

17. The touch panel as claimed in claim 1, further comprising a first substrate and a second substrate disposed opposite to the first substrate, wherein the touch elements are disposed on the first substrate, the hovering touch elements are disposed on the second substrate, and the second substrate is disposed at a side near a user.

18. The touch panel as claimed in claim 17, wherein the first substrate is a substrate of a display.

19. The touch panel as claimed in claim 17, wherein the first substrate and the second substrate are respectively a plastic substrate or a glass substrate.

20. The touch panel as claimed in claim 17, wherein the second substrate is a cover plate, the cover plate is a strengthened glass substrate, a plastic substrate or a rigid substrate, and the hovering touch elements are located at a side of the cover plate facing to the first substrate.

21. The touch panel as claimed in claim 20, further comprising a decoration layer disposed at the peripheral area.

22. The touch panel as claimed in claim 17, further comprising a cover plate, and the cover plate is disposed at a side of the second substrate opposite to the first substrate.

23. The touch panel as claimed in claim 1, further comprising a first substrate, a second substrate disposed opposite to the first substrate and a cover plate, wherein the cover plate and the first substrate are respectively disposed at two opposite sides of the second substrate, wherein the touch elements are disposed on the first substrate, the hovering touch elements are disposed on the second substrate, and the second substrate is located between the touch elements and the hovering touch elements, and the hovering touch elements are located between the second substrate and the cover plate.

24. The touch panel as claimed in claim 1, further comprising a first shielding layer located at a side of the wirings near a user.

25. The touch panel as claimed in claim 24, wherein the first shielding layer covers the peripheral area, and exposes the touch area.

26. The touch panel as claimed in claim 24, further comprising a second shielding layer, wherein the wirings are disposed between the second shielding layer and the first shielding layer.

27. The touch panel as claimed in claim 26, wherein the second shielding layer covers the touch area and the peripheral area.

28. The touch panel as claimed in claim 1, wherein the touch elements comprise a plurality of first electrodes, the hovering touch elements comprise a plurality of second electrodes, the second electrodes expose at least a part of the first electrodes, and the first electrodes and the second electrodes are electrically connected to the pads through the wirings.

29. A touch panel, having a touch area and a peripheral area adjacent to the touch area, the touch panel comprising:

a plurality of first electrodes, located in the touch area;

a plurality of second electrodes, electrically insulated to the first electrodes, and located in the touch area

a plurality of third electrodes, electrically insulated to the first electrodes and the second electrodes, and located in the touch area, wherein the third electrodes expose at least a part of the first electrodes and at least a part of the second electrodes;

a plurality of pads, located in the peripheral area; and

a plurality of wirings, wherein the first electrodes, the second electrodes and the third electrodes are electrically connected to the pads through the wirings respectively.

30. The touch panel as claimed in claim 29, wherein the first electrodes, the second electrodes and the third electrodes are located in different levels and are electrically insulated to each other.

31. The touch panel as claimed in claim 29, wherein the first electrodes and the second electrodes are located in a same level, and the third electrodes are located at a level different to that of the first electrodes or the second electrode.

32. The touch panel as claimed in claim 29, wherein the first electrodes and the second electrodes are located in different levels, and the third electrodes are located at a level same as that of the first electrodes or the second electrode.

33. The touch panel as claimed in claim 29, wherein the first electrodes and the second electrodes and the third electrodes are located in a same level.

34. The touch panel as claimed in claim 29, wherein the wirings of the first electrodes, the second electrodes and the third electrodes sequentially receive scan signals.