CONDUCTIVE SHEET, METHOD FOR USING CONDUCTIVE SHEET, AND TOUCH PANEL

• US 20120312677A1
• Filed: 01/28/2011
• Published: 12/13/2012
• Est. Priority Date: 01/28/2010
• Status: Active Grant

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Inventors: Kuriki, Tadashi
• Granted Patent: US 8,917,252 B2
• Time in Patent Office: Days
• US Class Current: 200/600
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• 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 3/047 using sets of wires, e.g. crossed wires
• CPC Class Codes: H03K 17/9622 using a plurality of detectors, e.g. keyboard
• CPC Class Codes: H03K 2017/9613 using two electrodes per touch switch
• CPC Class Codes: H03K 2217/960755 Constructional details of capacitive touch and proximity switches

Abstract

A conductive sheet, method for using conductive sheet and touch panel, having a base substance and conductive parts formed on one of the principal surfaces of the base substance. The conductive parts respectively extend in primary directions, and have two or more conductive patterns made from metal wires arranged in a second direction that is perpendicular to the first direction. The conductive pattern is constituted by serially connecting two or more large gratings in the first direction, and each of the large gratings is constituted by combining two or more small gratings. Around the edges of the large grating, non-connective patterns are formed from metal wires which are not connected with the large gratings.

Claims

1-29. -29. (canceled)

30. A touch panel comprising a touch panel conductive sheet, wherein

the touch panel conductive sheet contains a substrate, a first conductive part formed on one main surface of the substrate, and a second conductive part formed on the other main surface of the substrate,

the first conductive part contains two or more first conductive patterns and a first dummy pattern,

the first conductive patterns each extend in a first direction and are arranged in a second direction perpendicular to the first direction,

the first dummy pattern contains a plurality of first auxiliary wires arranged around the first conductive patterns,

the second conductive part contains two or more second conductive patterns and a second dummy pattern,

the second conductive patterns each extend in the second direction and are arranged in the first direction,

the second dummy pattern contains a plurality of second auxiliary wires arranged around the second conductive patterns,

the first conductive patterns and the second conductive patterns are crossed as viewed from above,

the first dummy pattern and the second dummy pattern overlap with each other to form a combined pattern between the first conductive patterns and the second conductive patterns, and

the first auxiliary wires and the second auxiliary wires are not perpendicularly crossed in the combined pattern.

31. The touch panel according to claim 30, wherein

in the combined pattern, a first axis line of the first auxiliary wire and a second axis line of the second auxiliary wire are arranged approximately in parallel, and the distance between the first axis line and the second axis line is at least ½

of a smaller line width among the line widths of the first auxiliary wire and the second auxiliary wire and at most 100 μ

m.

32. The touch panel according to claim 31, wherein in the combined pattern, the first auxiliary wire and the second auxiliary wire partially overlap with each other.

33. The touch panel according to claim 31, wherein a distance between the first axis line and the second axis line is larger than a total of ½

of a line width of the first auxiliary wire and ½

of a line width of the second auxiliary wire.

34. The touch panel according to claim 30, wherein when a third direction is defined as a direction bisecting an angle between the first and second directions, and a fourth direction is defined as a direction perpendicular to the third direction,

the first conductive part or the second conductive part is displaced by a shift length from a standard position at least in the third direction, the shift length being at least ½

of a smaller line width among line widths of the first auxiliary wire and the second auxiliary wire and at most 100 μ

m.

35. The touch panel according to claim 34, wherein the first conductive part or the second conductive part is displaced by 50 μ

m or less.

36. The touch panel according to claim 34, wherein the first conductive part or the second conductive part is displaced by 30 μ

m or less.

37. The touch panel according to claim 34, wherein the standard position is such a position that a first axis line of the first auxiliary wire corresponds to a second axis line of the second auxiliary wire, the first auxiliary wire does not overlap with the second auxiliary wire, and an end of the first auxiliary wire corresponds to an end of the second auxiliary wire.

38. The touch panel according to claim 34, wherein the first dummy pattern and the second dummy pattern overlap with each other to form the combined pattern between the first conductive patterns and the second conductive patterns, and

the first auxiliary wires and the second auxiliary wires are not perpendicularly crossed in the combined pattern.

39. The touch panel according to claim 34, wherein in the combined pattern, a first axis line of the first auxiliary wire and a second axis line of the second auxiliary wire are arranged approximately in parallel, and a distance between the first axis line and the second axis line is at least ½

of the smaller line width among the line widths of the first auxiliary wire and the second auxiliary wire.

40. The touch panel according to claim 39, wherein the distance between the first axis line and the second axis line is equal to a total of ½

of the line width of the first auxiliary wire and ½

of the line width of the second auxiliary wire.

41. The touch panel according to claim 39, wherein the distance between the first axis line and the second axis line is smaller than a total of ½

of the line width of the first auxiliary wire and ½

of the line width of the second auxiliary wire.

42. The touch panel according to claim 30, wherein the first conductive patterns and the second conductive patterns each contain a large number of lattices.

43. The touch panel according to claim 30, wherein the first conductive patterns each contain two or more first large lattices connected in series in the first direction,

the second conductive patterns each contain two or more second large lattices connected in series in the second direction,

the first large lattices and the second large lattices each contain a combination of two or more small lattices,

the first dummy pattern separated from the first large lattices is formed around a side of the first large lattices, and

the second dummy pattern separated from the second large lattices is formed around a side of the second large lattices.

44. The touch panel according to claim 43, wherein the first conductive part or the second conductive part is displaced by at most ½

of an arrangement pitch of the small lattices.

45. The touch panel according to claim 43, wherein a first axis line of the first auxiliary wire and a second axis line of the second auxiliary wire are arranged approximately in parallel in the combined pattern, and a distance between the first axis line and the second axis line is at least ½

of a smaller line width among line widths of the first auxiliary wire and the second auxiliary wire and at most ½

of the arrangement pitch of the small lattices.

46. The touch panel according to claim 43, wherein the first large lattices and the second large lattices have a side length of 3 to 10 mm, and

the small lattices have a side length of 50 to 500 μ

m.

47. The touch panel according to claim 30, wherein the first conductive patterns and the second conductive patterns contain a thin wire having a line width of 15 μ

m or less.

48. The touch panel according to claim 30, wherein the first conductive part and the second conductive part have a line width of 15 μ

m or less.