Display device

1. A display device comprising:

a plurality of pixels; and

a touch sensor overlapping with the plurality of pixels, the touch sensor comprising:

a first wiring arranged in a first direction and including a plurality of first electrodes; and

a second wiring arranged in a second direction intersecting the first direction and including a plurality of second electrodes,

wherein each of the first electrodes and each of the second electrodes vary in width continuously or stepwise in the first direction and the second direction, respectively, and satisfy the following equation:

0.042

⁢

A

≤

S

A

<

0.063

⁢

A

where S is an area of each of the first electrodes or each of the second electrodes, and A is a total length of sides of each of the first electrodes or each of the second electrodes,

the plurality of first electrodes is arranged linearly, and

the plurality of second electrodes is arranged in a zig-zag pattern.

2. The display device according to claim 1 ,

wherein the first wiring further comprises a connection portion connecting the adjacent first electrodes and having a constant width, and

the second wiring further comprises a connection portion connecting the adjacent second electrodes and having a constant width.

3. The display device according to claim 2 ,

wherein the connection portion of the second wiring is inclined from the second direction.

4. The display device according to claim 1 ,

wherein the first electrodes and the second electrodes each have a polygonal shape, and

each side of the polygonal shape is longer than one of the widths of the first wiring and the second wiring which is shorter than the other.

5. The display device according to claim 4 ,

wherein the polygonal shape is a triangle.

6. The display device according to claim 5 ,

wherein the polygonal shape is selected from an equilateral triangle, an isosceles triangle, and a right-angled triangle.

7. The display device according to claim 1 ,

wherein each of the first electrodes and each of the second electrodes have a mesh-shape with a plurality of openings.

8. The display device according to claim 7 ,

wherein each of the openings overlaps with three or more of the plurality of pixels.

9. The display device according to claim 7 , further comprising a partition wall between the two adjacent pixels,

wherein, in each of the first electrodes and the second electrodes, a region between the two adjacent openings is confined within a region overlapping with the partition wall.

10. The display device according to claim 1 , further comprising an insulating film between the first wiring and the second wiring.

11. The display device according to claim 1 , further comprising an insulating film between the first to nth transmitting wirings and the first to mth receiving wirings.

12. A display device comprising:

a plurality of pixels each including a light-emitting element; and

a touch sensor overlapping with the plurality of pixels, the touch sensor comprising:

first to nth transmitting wirings arranged in a stripe form and each including a plurality of alternating transmitting electrodes and connection portions; and

first to mth receiving wirings arranged in a stripe form and each including a plurality of alternating receiving electrodes and connection portions,

wherein each of the plurality of transmitting electrodes and the plurality of receiving electrodes has a triangle shape,

m and n are each a natural number equal to or larger than 2, and

a direction of the triangle shape of the transmitting electrodes is opposite to a direction of the triangle shape of the receiving electrodes.

13. The display device according to claim 12 ,

wherein one of the plurality of receiving electrodes is surrounded by the two adjacent transmitting electrodes of the kth transmitting wiring and one of the transmitting electrodes of the (k+1)th transmitting wiring, and

k is a natural number equal to or larger than 1 and smaller than n.

14. The display device according to claim 12 ,

wherein one of the plurality of receiving electrodes is surrounded by the two adjacent transmitting electrodes of the kth transmitting wiring and the two adjacent transmitting electrodes of the (k+1)th transmitting wiring, and

k is a natural number equal to or larger than 1 and smaller than n.

15. The display device according to claim 14 ,

wherein three sides of the surrounded receiving electrode are parallel to a side of one of the two transmitting electrodes of the kth transmitting wiring, a side of the other of the two transmitting electrodes of the kth transmitting wiring, and a side of one of the two adjacent transmitting electrodes of the (k+1)th transmitting wiring, respectively.

16. The display device according to claim 12 ,

wherein each of the plurality of transmitting electrodes and each of the plurality of receiving electrodes are each a mesh-shape having a plurality of openings, and

each of the openings overlaps with three or more of the plurality of pixels.

17. The display device according to claim 16 , further comprising a partition wall between the two adjacent pixels,

wherein, in each of the transmitting electrodes and the receiving electrodes, a region between the two adjacent openings is confined within a region overlapping with the partition wall.