TOUCH PANEL

• US 20140204043A1
• Filed: 01/17/2014
• Published: 07/24/2014
• Est. Priority Date: 01/18/2013
• Status: Abandoned Application

• Current Assignee: Wintek Corporation
• Original Assignee: Wintek Corporation
• Inventors: Lin, Yi-Chun, Wu, Ming-Kung, Hwang, Chin-Pei, Chen, Kuo-Hsing, Chen, Yu-Ting, Su, Chen-Hao, Su, Kuo-Chang, Lee, Yun-Bin, Li, Yan-Ling
• Application Number:
  US14/157,524
• Publication Number:
  US 20140204043A1
• Time in Patent Office: Days
• US Class Current: 345/173
• 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 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• 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

A touch panel including a substrate, a decoration layer, and conductive elements is provided. The decoration layer has an outer margin adjacent to an edge of the substrate and an inner margin opposite to the outer region. A reference line is away from the inner margin with a distance of at least 20 μm towards a direction away from the outer margin. At least one of the conductive elements includes a cross-interface portion which covers the decoration layer and a region of the substrate without the decoration layer. A first distance and a second distance between two adjacent cross-interface portions are provided in a region outward of the reference line to the outer margin of the decoration layer, and in a region inward of the reference line, respectively. The first distance is greater than the second distance. The conductive elements construct touch sensing units for forming a capacitance coupling.

Claims

1. A touch panel comprising:

a substrate;

a decoration layer disposed on at least one side of the substrate, the decoration layer having an outer margin and an inner margin, the outer margin opposite to the inner margin and adjacent to an edge of the substrate, wherein the inner margin is located between a reference line and the outer margin, and the reference line is at least 20 μ

m apart from the inner margin; and

a plurality of conductive elements disposed on the substrate, the conductive elements comprising at least two cross-interface portions, the at least two cross-interface portions covering the decoration layer and a region on the substrate without the decoration layer;

wherein, a distance between the at least two cross-interface portions adjacent to each other comprises a first distance in a region outward of the reference line to the outer margin, and comprises a second distance in a region inward of the reference line, and the first distance is greater than the second distance;

wherein, the conductive elements at least construct a plurality of touch sensing units, and each touch sensing unit is used to form a capacitance coupling.

2. The touch panel as recited in claim 1, wherein the at least two cross-interface portions construct at least a portion of the touch sensing units.

3. The touch panel as recited in claim 1, wherein the conductive elements further construct a plurality of connecting wires electrically connected to at least a portion of the touch sensing unit, and the connecting wires are disposed on the decoration layer.

4. The touch panel as recited in claim 3, wherein at least a portion of the connecting wires covering the decoration layer and a region on the substrate without the decoration layer so as to be at least a part of the cross-interface portions.

5. The touch panel as recited in claim 4, wherein the at least a portion of the connecting wires comprises at least one bent portion, and each bent portion is disposed at the region on the substrate without the decoration layer, so that, in the connecting wires, a minimum distance on the decoration layer between outermost two connecting wires is greater than a minimum distance on the region of the substrate without the decoration layer between the outermost two connecting wires.

6. The touch panel as recited in claim 5, wherein N amounts of the touch sensing units construct a same serial group, a minimum width of the connecting wires is M μ

m, and a farthest distance from the at least one bent portion to the inner margin of the decoration layer is at least N multiplied by M μ

m.

7. The touch panel as recited in claim 5, wherein a shielding wire is disposed between the at least a portion of the connecting wires and the touch sensing units, the shielding wire is connected to a reference potential, and a width of the shielding wire is at least 50 μ

m.

8. The touch panel as recited in claim 5, wherein each of the at least a portion of the connecting wires comprises at least two different linewidths and at least two different spacings each between adjacent two of the at least a portion of the connecting wires.

9. The touch panel as recited in claim 8, wherein each of the at least a portion of the connecting wires, from a starting end connecting to the corresponding touch sensing unit to a terminal end, comprises a first linewidth, a second linewidth, and a third linewidth;

and

the spacings between adjacent two of the at least a portion of the connecting wires, from the starting end to the terminal end, comprises a first spacing, a second spacing and a third spacing;

wherein, the third linewidth is greater than the first linewidth, and the third spacing is greater than the first spacing and the second spacing.

10. The touch panel as recited in claim 3 further satisfying:

G1≦

P−

W;

wherein, G1 is the first distance;

P represents a pitch of the conductive elements in a region between the reference line and the edge of the substrate; and

W is the linewidth of the connecting wires.

11. The touch panel as recited in claim 1, wherein the first distance is greater than or equal to 35 μ

m.

12. The touch panel as recited in claim 1, wherein the decoration layer is a single-layer structure, and a composition of the single-layer structure comprises light shading material.

13. The touch panel as recited in claim 1, wherein the decoration layer is a multi-layer structure.

14. The touch panel as recited in claim 13, wherein the multi-layer structure includes at least two layer structures having different colors contrasting to each other.

15. The touch panel as recited in claim 1, wherein the conductive elements are made of a same material or a plurality of materials selected from a transparent conductive material, a nano metal film or a carbon nanotube, and a metal mesh structure including metal with a linewidth less than 5 μ

m.

16. The touch panel as recited in claim 1 further comprising a plurality of separated insulating patterns disposed between the conductive elements and the decoration layer, so that the decoration layer and an interval between the at least two cross-interface portions outward of the reference line are separated.

17. The touch panel as recited in claim 1, wherein a portion of the conductive elements further constructs a plurality of auxiliary electrodes, the auxiliary electrodes are disposed at a region inward of the reference line, each auxiliary electrode is at least disposed between two adjacent conductive elements in the touch sensing units, and is separated from the two adjacent conductive elements with the second distance.

18. The touch panel as recited in claim 1, wherein the touch sensing units comprise a plurality of first electrodes and a plurality of second electrodes, wherein each first electrode comprises a plurality of first branches directing toward the second electrode adjacent thereof, and the second electrodes comprise a plurality of second branches directing toward the first electrodes adjacent thereof, and the first branches and the second branches are arranged in a staggered manner.

19. The touch panel as recited in claim 1, wherein the outer margin of the decoration layer and the edge of the substrate are spaced from a distance, and the touch panel further comprises a light shielding layer at least covering a portion of a region where the decoration layer locates and extendedly covering at least a portion of a sidewall of the substrate.

20. The touch panel as recited in claim 1 further comprising a insulating layer, the insulating layer being selected from an anti-reflective optical film, a planarization layer and a combination thereof;

wherein, the anti-reflective optical film covers the conductive elements or is disposed between the substrate and the conductive elements, and the anti-reflective optical film comprises at least two laminated layers having different refractivity;

wherein, the planarization layer covers the conductive elements and has a thickness of at least 0.8 μ

m.

21. The touch panel as recited in claim 1 further comprising an overlay covering the substrate and the decoration layer, wherein a difference between a refractivity of the overlay and a refractivity of the substrate is less than 0.3, and the conductive elements are directly disposed on the overlay.

22. A touch panel comprising:

a substrate;

a decoration layer disposed on at least one side of the substrate, the decoration layer having a multi-layer structure, and an outermost layer structure in the multi-layer structure away from the substrate having an outer margin and a inner margin, the outer margin being closer to an edge of the substrate than the inner margin, wherein the inner margin is located between the outer margin and a reference line, and the reference line is at least 20 μ

m apart from the inner margin; and

a plurality of conductive elements disposed on the substrate, the conductive elements comprising at least two cross-interface portions, the at least two cross-interface portions cover the decoration layer and a region on the substrate without the decoration layer;

wherein, a distance between the at least two cross-interface portions adjacent to each other comprises a first distance in a region outward of the reference line to the outer margin, and comprises a second distance in a region inward of the reference line, and the first distance is greater than the second distance;

wherein, the conductive elements at least construct a plurality of touch sensing units, and each touch sensing unit is used to form a capacitance coupling.

23. The touch panel as recited in claim 22, wherein the multi-layer structure of the decoration layer comprises a non-black decoration layer disposed between the substrate and the outermost layer structure, and the outermost layer structure comprises light shading material.

24. The touch panel as recited in claim 22, wherein the first distance is greater than or equal to 35 μ

m.

25. The touch panel as recited in claim 22 further comprising a plurality of separated insulating patterns disposed between the conductive elements and the decoration layer, so that the decoration layer and an interval between the at least two cross-interface portions outward of the reference line are separated.

26. The touch panel as recited in claim 22, wherein a portion of the conductive elements further construct a plurality of auxiliary electrodes, the auxiliary electrodes are disposed at a region inward of the reference line, each auxiliary electrode is at least disposed between the two adjacent conductive elements in the touch sensing units, and is separated from the two adjacent conductive elements with the second distance.

27. The touch panel as recited in claim 22, wherein the at least two cross-interface portions construct at least a portion of the touch sensing units.

28. The touch panel as recited in claim 22, wherein the conductive elements further construct a plurality of connecting wires electrically connected to at least a portion of the touch sensing units, and at least a portion of the connecting wires covering the decoration layer and the region on the substrate without the decoration layer so as to be at least a part of the cross-interface portions.

29. The touch panel as recited in claim 22, wherein an edge of the decoration layer keeps a distance apart from the edge of the substrate, and the touch panel further comprises a light shielding layer at least covering a portion of a region where the decoration layer locates and extendedly covering at least a portion of a sidewall of the substrate.

30. The touch panel as recited in claim 22 further comprising a insulating layer, the insulating layer being selected from an anti-reflective optical film, a planarization layer and a combination thereof;

wherein, the anti-reflective optical film covers the conductive elements or is disposed between the substrate and the conductive elements, and the anti-reflective optical film comprises at least two laminated layers having different refractivity;

wherein, the planarization layer covers the conductive elements and has a thickness of at least 0.8 μ

m.

31. The touch panel as recited in claim 22 further comprising an overlay covering the substrate and the decoration layer, wherein a difference between a refractivity of the overlay and a refractivity of the substrate is less than 0.3, and the conductive elements are directly disposed on the overlay.

32. A touch panel comprising:

a substrate;

a light resistant layer disposed on the substrate to form a budge structure, the light resistant layer comprising at least one layer structure; and

a plurality of conductive elements disposed on the substrate, the conductive elements comprising at least two cross-interface portions, the at least two cross-interface portions covering the light resistant layer and a region on the substrate without the light resistant layer;

wherein, the light resistant layer comprises a contacting surface contacted with the at least two cross-interface portions;

wherein, in a coverage of the contacting surface, a distance between the at least two cross-interface portions adjacent to each other is greater than or equal to 35 μ

m; and

wherein, the conductive elements at least construct a plurality of touch sensing units, and each touch sensing unit is used to form a capacitance coupling.

33. The touch panel as recited in claim 32, wherein the light resistant layer has a multi-layer structure, an outermost layer structure of the light resistant layer comprises a light shading material, an interaction between the outermost layer structure and the at least two cross-interface portions is greater than an interaction between the rest of the multi-layer structure and the at least two cross-interface portions.

34. The touch panel as recited in claim 33, wherein the multi-layer structure of the light resistant layer comprises a non-black decoration layer disposed between the substrate and the outermost layer structure.

35. The touch panel as recited in claim 32 further comprising a plurality of separated insulating patterns disposed between the conductive elements and the light resistant layer, so as to separate an interval between at least two cross-interface portions from the light resistant layer.

36. The touch panel as recited in claim 32, wherein a portion of the conductive elements further construct a plurality of auxiliary electrodes being not in contact with the light resistant layer, each auxiliary electrode is at least disposed between the two adjacent conductive elements, and is separated from the two adjacent conductive elements with a distance less than 30 μ

m.

37. The touch panel as recited in claim 32, wherein the at least two cross-interface portions construct at least a portion of the touch sensing units.

38. The touch panel as recited in claim 32, wherein the conductive elements further construct a plurality of connecting wires electrically connected to at least a portion of the touch sensing units, and at least a portion of the connecting wires covering the decoration layer and the region on the substrate without the decoration layer so as to be at least a part of the cross-interface portions.

39. The touch panel as recited in claim 38, wherein the at least a portion of the connecting wires comprises a bent portion, and each bent portion is disposed at the region on the substrate without the decoration layer, so that, in the connecting wires, a minimum distance between the outermost two connecting wires on the light resistant layer is greater than a minimum distance between the outermost two connecting wires in the region on the substrate without the light resistant layer.

40. The touch panel as recited in claim 39, wherein N amount of the touch sensing units construct a same serial group, a minimum width of the connecting wires is M μ

m, a farthest distance from the at least one bent portion to the inner margin of the decoration layer is at least N multiplied by M μ

m.

41. The touch panel as recited in claim 39, wherein a shielding wire is disposed between the at least a portion of the connecting wires and the touch sensing units, the shielding wire is connected to a reference potential, and a width of the shielding wire is at least 50 μ

m.

42. The touch panel as recited in claim 39, wherein each of the at least a portion of the connecting wires comprises at least two different linewidths and at least two different spacings each between adjacent two of the at least a portion of the connecting wires.

43. The touch panel as recited in claim 42, wherein each of the at least a portion of the connecting wires, from a starting end connecting to the corresponding touch sensing unit to a terminal end, comprises a first linewidth, a second linewidth, and a third linewidth;

and the spacings between adjacent two of the at least a portion of the connecting wires, from the starting end to the terminal end, comprises a first spacing, a second spacing and a third spacing;

wherein, the third linewidth is greater than the first linewidth, and the third spacing is greater than the first spacing and the second spacing.

44. The touch panel as recited in claim 32, wherein the touch sensing units comprise a plurality of first electrodes and a plurality of second electrodes, wherein each first electrode comprises a plurality of first branches directing toward the second electrode adjacent thereof, and the second electrodes comprise a plurality of second branches directing toward the first electrodes adjacent thereof, and the first branches and the second branches are arranged in a staggered in manner.

45. The touch panel as recited in claim 32 further comprising a insulating layer, the insulating layer being selected from an anti-reflective optical film, a planarization layer and a combination thereof;

wherein, the anti-reflective optical film covers the conductive elements or is disposed between the substrate and the conductive elements, the anti-reflective optical film comprises at least two laminated layers having different refractivity;

wherein, the planarization layer covers the conductive elements and has a thickness of at least 0.8 μ

m.

46. The touch panel as recited in claim 32, wherein an interaction between the contacting surface and the at least two cross-interface portions is greater than an interaction between the substrate and the at least two cross-interface portions.