Touch sensor and display device including the same
A touch sensor includes a touch sensing region, a touch sensing electrode in the touch sensing region, a touch extending wire extended to the touch sensing electrode, a touch pad on an end of the touch extending wire, a flexible printed circuit board overlapping the touch pad, a flexible printed circuit pad on the flexible printed circuit board and facing the touch pad, and a conductive bonding member between the touch pad and the flexible printed circuit pad. The conductive bonding member is bonded to each of the touch pad and the flexible printed circuit pad. The touch pad includes a first touch pad layer made of a transparent metal oxide, and a second touch pad layer on the first touch pad layer. The second touch pad layer is made of a metal material. The conductive bonding member is bonded to the second touch pad layer.
1. A touch sensor comprising:
a touch sensing region;
a touch sensing electrode in the touch sensing region;
a touch extending wire extended to the touch sensing electrode;
a touch pad on an end of the touch extending wire;
a flexible printed circuit board overlapping the touch pad;
a flexible printed circuit pad on the flexible printed circuit board and facing the touch pad; and
a conductive bonding member between the touch pad and the flexible printed circuit pad, the conductive bonding member being bonded to each of the touch pad and the flexible printed circuit pad,
wherein the touch pad comprises:
a first touch pad layer made of a transparent metal oxide; and
a second touch pad layer on the first touch pad layer, the second touch pad layer being made of a non-transparent metal material, and
wherein the conductive bonding member is bonded to the second touch pad layer,
wherein the second touch pad layer comprises:
a first portion and a second portion separated from each other; and
an extender extending to the first portion and the second portion, and
wherein the extender of the second touch pad layer and the flexible printed circuit pad extend parallel to each other or the extender of the second touch pad layer extends in an oblique direction with respect to a length direction of the flexible printed circuit pad.
2. The touch sensor of claim 1 , wherein:
the conductive bonding member is made of a metal material;
the metal material of the conductive bonding member contacts the non-transparent metal material of the second touch pad layer; and
the conductive bonding member is fusion bonded or ultrasonic wave bonded to each of the touch pad and the flexible printed circuit pad.
3. The touch sensor of claim 1 , wherein the extender of the second touch pad layer is narrower than the first touch pad layer.
4. The touch sensor of claim 3 , wherein the second touch pad layer comprises a plurality of extenders, the extender being one of the plurality of extenders.
5. The touch sensor of claim 4 , wherein the plurality of extenders extend parallel to each other.
6. The touch sensor of claim 4 , wherein at least one of the plurality of extenders extends in a different direction than another one of the plurality of extenders.
7. A display device comprising:
a substrate comprising a touch sensing region;
a light-emitting device on the substrate;
an encapsulation structure on the light-emitting device;
a touch sensing electrode in the touch sensing region on the encapsulation structure;
a touch extending wire extended to the touch sensing electrode;
a touch pad on an end of the touch extending wire;
a flexible printed circuit board overlapping the touch pad;
a flexible printed circuit pad on the flexible printed circuit board and facing the touch pad; and
a conductive bonding member between the touch pad and the flexible printed circuit pad, the conductive bonding member being bonded to each of the touch pad and the flexible printed circuit pad,
wherein the touch pad comprises:
a first touch pad layer made of a transparent metal oxide; and
a second touch pad layer on the first touch pad layer, the second touch pad layer being made of a non-transparent metal material, and
wherein the conductive bonding member is bonded to the second touch pad layer;
wherein the second touch pad layer comprises:
a first portion and a second portion separated from each other; and
an extender extending to the first portion and the second portion, and
wherein the extender of the second touch pad layer and the flexible printed circuit pad extend parallel to each other or the extender of the second touch pad layer extends in an oblique direction with respect to a length direction of the flexible printed circuit pad.
8. The display device of claim 7 , further comprising:
a sealing member between the substrate and the encapsulation structure,
wherein the touch pad overlaps the sealing member.
9. The display device of claim 7 , wherein:
the conductive bonding member is made of a metal material;
the metal material of the conductive bonding member contacts the non-transparent metal material of the second touch pad layer; and
the conductive bonding member is fusion bonded or ultrasonic wave bonded to each of the touch pad and the flexible printed circuit pad.
10. The display device of claim 7 , wherein the extender of the second touch pad layer is narrower than the first touch pad layer.
11. The display device of claim 10 , wherein the second touch pad layer comprises a plurality of extenders, the extender being one of the plurality of extenders.
12. The display device of claim 11 , wherein the plurality of extenders extend parallel to each other.
13. The display device of claim 11 , wherein at least one of the plurality of extenders extends in a different direction than another one of the plurality of extenders.