Touch sensor and method for manufacturing same
The present application relates to a touch sensor and a method for preparing the same, and the touch sensor according to the present application includes: a substrate; and a driving electrode part, a sensing electrode part, and a wiring electrode part, which are provided on the same surface of the substrate, in which the driving electrode part, the sensing electrode part, and the wiring electrode part each include a conductive pattern including a shielding part and an opening.
1. A touch sensor comprising:
a substrate; and
a driving electrode part, a sensing electrode part, and a wiring electrode part, which are provided on the same surface of the substrate,
wherein the driving electrode part comprises a first conductive metal line pattern, the sensing electrode part comprises a second conductive metal line pattern, and the wiring electrode part comprises a third conductive metal line pattern, wherein each of the driving electrode part, the sensing electrode part and the wiring electrode part comprises a shielding part, which is not optically transparent and in which a conductive metal line is provided on the substrate, and an opening in which the conductive metal line is not provided on the substrate, wherein at least a part of the first conductive metal line pattern of the driving electrode part and the second conductive metal line pattern of the sensing electrode part each comprises a plurality of disconnection points where the respective conductive metal line pattern of the driving electrode part and the sensing electrode part is disconnected from adjacent conductive metal line patterns on the substrate such that an electrical connection is interrupted between the respective conductive metal line patterns of the driving electrode part and the sensing electrode part and the adjacent conductive metal line patterns on the substrate, and each disconnection point establishes a distance between nearest adjacent ends of two or more conductive metal lines that has an average width of 13 um or less,
the wiring electrode part comprises a first portion disposed at a touch sensing region of the touch sensor and a second portion disposed at a touch non-sensing region of the touch sensor, and the first portion of the wiring electrode part comprises a plurality of bundles of wirings which connect the driving electrode part and the sensing electrode part to the second portion of the wiring electrode part,
wherein each of the plurality of bundles of wirings is composed of a network pattern comprising a plurality of conductive metal wirings arranged in one of a regular mesh pattern and a polygonal pattern,
wherein from among the plurality of bundles of conductive metal wirings at least one bundle of wirings comprises a largest number of conductive metal wirings among the plurality of bundles, and for the at least one bundle of conductive metal wirings comprising the largest number of conductive metal wirings, a width (W) of the at least one bundle, the number (n) of the conductive metal wirings included in the at least one bundle, and a minimum value (P) among respective distances between center points of adjacent network structures of the network pattern of the at least one bundle sharing at least one side in the network pattern constituting the at least one bundle of conductive metal wirings are implemented according to Equation 1:
W
n
×
2
≥
P
,
[
Equation
1
]
wherein the driving electrode part comprises a pattern of X form and the sensing electrode part comprises a pattern surrounding the pattern of X form, and
wherein the respective distances between center points of adjacent network structures of the network pattern of the at least one bundle sharing at least one side in the network pattern constituting the at least one bundle of conductive metal wirings corresponds to a pitch of a mesh pattern when the network pattern is the regular mesh pattern, and corresponds to a distance between center points of adjacent polygonal patterns sharing at least one side or a distance between centers of gravity when the network pattern is the polygonal pattern.
2. The touch sensor of claim 1 , wherein at least one of the plurality of bundles of conductive metal wirings satisfies Equation 2:
W
n
≥
P
×
cos
θ1
,
[
Equation
2
]
wherein W, n, and P are the same as those defined in Equation 1, and
θ1 represents an angle between a straight line connecting a shortest distance in a width direction of the at least one bundle of conductive metal wirings that satisfies Equation 2 and a straight line connecting center points of adjacent network structures of the network pattern of the at least one bundle of conductive metal wirings that satisfies Equation 2 sharing at least one side in the network pattern constituting the at least one bundle of conductive metal wirings that satisfies Equation 2as the shortest distance.
3. The touch sensor of claim 1 , wherein at least one of the plurality of bundles of wirings is composed of a form of pattern in which closed figures having two disconnection points are consecutively disposed in a direction from one side of the substrate, which is adjacent to an end of the second wiring electrode, to the other side of the substrate facing the one side,
a shortest distance between adjacent disconnection points of the consecutively disposed closed figures includes one or more inflection points having an angle of 90° or more, and
a pattern tangent to the shortest distance between adjacent disconnection points electrically connects the driving electrode part or the sensing electrode part to the second portion of the wiring electrode part.
4. The touch sensor of claim 3 , wherein at least one of the plurality of bundles of conductive metal wirings satisfies Equation 3:
W
n
≥
P
×
cos
θ2
,
[
Equation
3
]
wherein W, n, and P are the same as those defined in Equation 1, and
θ2 represents an angle between a straight line in a direction vertical to a shortest distance between disconnection points of consecutively disposed closed figures in the at least one bundle of conductive metal wirings that satisfies Equation 3, and a straight line connecting center points of adjacent network structures sharing at least one side in the network pattern constituting the at least one bundle of conductive metal wirings that satisfies Equation 3 as the shortest distance.
5. The touch sensor of claim 1 , wherein the conductive metal line comprises one or more selected from the group consisting of gold, silver, aluminum, copper, neodymium, molybdenum, nickel, and an alloy thereof.
6. The touch sensor of claim 1 , wherein the respective conductive metal line patterns of the driving electrode part, the sensing electrode part, and the wiring electrode part each independently further comprise a darkened pattern provided on the respective conductive metal line patterns.
7. The touch sensor of claim 1 , wherein each disconnection point is provided in an intersecting point region in which the conductive metal lines in the driving electrode part or the sensing electrode part intersect with each other.
8. The touch sensor of claim 1 , wherein a deviation in the aperture ratios among any regions of the touch sensor corresponding to the area of (W ×W) is within 10%, where W is the width of the at least one bundle of wirings.
9. The touch sensor of claim 1 , wherein the driving electrode part, the sensing electrode part, and the wiring electrode part are simultaneously formed by a one-time printing process.
10. The touch sensor of claim 1 , wherein the touch sensor recognizes a touch input using a mutual capacitance system.
11. A display device comprising the touch sensor of claim 1 .