Touch sensor and display device
A touch sensor includes: a first conductor including a net-like wiring line; and a second conductor adjacent to the first conductor and including a net-like wiring line. At least a part of a boundary portion between the first conductor and the second conductor extends in a first direction, and the net-like wiring line of the first conductor includes a plurality of disconnection points formed such that a disconnection edge intersects the first direction in a plan view.
1 . A touch sensor comprising:
a plurality of first sensing lines extending in a first direction and having a first net-like wiring structure; and
a plurality of second sensing lines extending in a second direction orthogonal to the first direction and having a second net-like wiring structure,
wherein:
the first net-like wiring structure and the second net-like wiring structure are different from each other, but are formed in a same conductive layer,
the first and second net-like wiring structures are electrically insulated at a boundary portion,
at least a part of the boundary portion between the first net-like wiring structure and the second net-like wiring structure extends in a third direction intersecting the first direction and the second direction,
the first net-like wiring structure includes, near the boundary portion, a plurality of first disconnection points in which a disconnection edge intersects the third direction in a plan view, and
the second net-like wiring structure includes, near the boundary portion, a plurality of second disconnection points in which a disconnection edge intersects the third direction in the plan view.
2 . The touch sensor according to claim 1 ,
wherein the plurality of first disconnection points and the plurality of second disconnection points have a shape of a wiring line notch.
3 . The touch sensor according to claim 2 ,
wherein, in the shape of the wiring line notch, a notch length is equal to or greater than a wiring line width of at least one of the first net-like wiring structure or the second net-like wiring structure.
4 . The touch sensor according to claim 2 ,
wherein, in the shape of the wiring line notch, a notch length is equal to or greater than a wiring line thickness of at least one of the first net-like wiring structure or the second net-like wiring structure.
5 . The touch sensor according to claim 1 ,
wherein the plurality of first disconnection points is provided in such a manner that a first current path is configured to be formed entirely in the first net-like wiring structure, and
the plurality of second disconnection points is provided in such a manner that a second current path is configured to be formed entirely in the second net-like wiring structure.
6 . The touch sensor according to claim 1 ,
wherein each of the first net-like wiring structure and the second net-like wiring structure has a plurality of boundary edges facing the boundary portion, and
in the first net-like wiring structure, when a total number of the plurality of boundary edges is M and a number of the plurality of first disconnection points is N, N divided by M is between 0.75 and 1.25, inclusive.
7 . The touch sensor according to claim 1 ,
wherein a plurality of island-like conductors is located in the boundary portion, and the plurality of island-like conductors and the first net-like wiring structure are formed in the same conductive layer.
8 . The touch sensor according to claim 1 ,
wherein a distance between the boundary portion and each of the plurality of first disconnection points is within 200 μm.
9 . The touch sensor according to claim 1 ,
wherein an outer shape of each of the first net-like wiring structure and the second net-like wiring structure is a V shape.
10 . The touch sensor according to claim 1 ,
wherein a width of the boundary portion is equal to or less than twice a mesh diameter of the first net-like wiring structure.
11 . The touch sensor according to claim 1 ,
wherein the disconnection edge of the plurality of first disconnection points and the disconnection edge of the plurality of second disconnection points are orthogonal to the third direction in the plan view.
12 . A display device comprising:
the touch sensor according to claim 1 ; and
a light-emitting element in which a light-emitting region is located in a mesh of the first net-like wiring structure and the second net-like wiring structure in the plan view.
13 . The touch sensor according to claim 1 ,
wherein a mesh formed by the first net-like wiring structure has a rectangular shape including sides parallel to the third direction and sides parallel to a fourth direction orthogonal to the third direction.
14 . The touch sensor according to claim 13 ,
wherein the plurality of first disconnection points includes two disconnection points arranged in the fourth direction in an annular portion surrounding the mesh.
15 . The touch sensor according to claim 14 ,
wherein, with the two disconnection points as lattice cut portions, the lattice cut portions are arranged in a staggered manner when viewed in the fourth direction.
16 . The touch sensor according to claim 1 ,
wherein the first direction intersects at an angle of +45 degrees or −45 degrees with respect to the third direction.
17 . The display device according to claim 12 ,
wherein the light-emitting element includes a light-emitting layer and a sealing layer, and
the light-emitting layer, the sealing layer, and the touch sensor are stacked on top of one another in this order.
18 . The touch sensor according to claim 13 ,
wherein the first net-like wiring structure does not have a disconnection point in a portion extending in the fourth direction.
19 . The touch sensor of claim 13 ,
wherein a difference between a reflectivity of light incident on the first net-like wiring structure and the second net-like wiring structure from the first direction and a reflectivity of light incident on the first net-like wiring structure and the second net-like wiring structure from the fourth direction is less than 10%.
20 . The touch sensor of claim 1 , further comprising:
an electrostatic capacitance between one of the plurality of first sensing lines and one of the plurality of second sensing lines,
wherein, when a sensing target approaches the touch sensor, the electrostatic capacitance changes such that a position of the sensing target is specified.