Organic light emitting display having touch sensors and method of fabricating the same, and display device
Disclosed is a display device comprising: a substrate comprising an active region and a non-active region; a light emitting device that emits light in the active area of the substrate; a touch sensor in the active area of the substrate that senses touch of the display device, the touch sensor including a plurality of conductive layers arranged in a stacking sequence; and a plurality of routing lines in the non-active region of the substrate that are connected to the touch sensor, each of the plurality of routing lines including a plurality of routing layers, each of the plurality of routing layers made of a same material as a corresponding one of the plurality of conductive layers included in the touch sensor, and the plurality of routing layers arranged in a same stacking sequence as the stacking sequence of the plurality of conductive layers of the touch sensor.
1. A display device comprising:
a light-emitting device disposed on a substrate;
an encapsulation unit disposed on the light-emitting device;
a plurality of touch electrodes disposed on the encapsulation unit; and
a routing line connected to the touch electrodes, the routing line being configured to have a structure in which a plurality of conductive films is stacked, wherein
at least one of the conductive films is configured to have a multi-layered structure.
2. The display device according to claim 1 , wherein
the touch electrodes comprise:
a plurality of first touch electrodes arranged in a first direction, the first touch electrodes being connected to each other via a first bridge; and
a plurality of second touch electrodes arranged in a second direction, which intersects the first direction, the second touch electrodes being connected to each other via a second bridge.
3. The display device according to claim 2 , further comprising:
a touch dielectric film disposed between the first bridge and the second bridge, wherein
the first touch electrodes, the second touch electrodes, and the first bridge are disposed on the encapsulation unit,
the second bridge is disposed on the touch dielectric film, and
the second bridge is connected to the second touch electrodes, which are exposed through touch contact holes formed through the touch dielectric film.
4. The display device according to claim 3 , further comprising an auxiliary bridge disposed between the first bridge and the encapsulation unit, the auxiliary bridge being connected to the first bridge.
5. The display device according to claim 3 , further comprising:
a touch dielectric film disposed between the first bridge and the second bridge, wherein
the second bridge is disposed on the encapsulation unit,
the first touch electrodes, the second touch electrodes, and the first bridge are disposed on the touch dielectric film, and
the second touch electrodes are connected to the second bridge, which is exposed through a touch contact hole formed through the touch dielectric film.
6. The display device according to claim 3 , wherein the second bridge is disposed between the first touch electrodes, the second touch electrodes, and the encapsulation unit.
7. The display device according to claim 1 , wherein at least one of the conductive films is configured to have a multi-layered structure comprising one of Al, Ti, Cu, Mo, ITO, and IZO.
8. The display device according to claim 1 , wherein at least one of the conductive films comprises one of Ti/Al/Ti and Mo/Al/Mo.
9. The display device according to claim 2 , wherein at least one of the first touch electrodes, the second touch electrodes, the first bridge, or the second bridge comprises a mesh-shaped conductive film having an opening formed therein.
10. The display device according to claim 9 , wherein the mesh-shaped conductive film overlaps a bank configured to define a light-emitting region of the light-emitting device.
11. The display device according to claim 10 , wherein the opening overlaps the light-emitting region.
12. The display device according to claim 10 , wherein the bank is disposed such that the opening has a diamond shape.
13. The display device according to claim 10 , wherein the mesh-shaped conductive film is disposed along the bank.
14. The display device according to claim 1 , wherein the routing line is formed along a side surface of the encapsulation unit.
15. The display device according to claim 1 , wherein the routing line contacts a side surface of the encapsulation unit.
16. The display device according to claim 1 , further comprising a touch buffer film disposed between the encapsulation unit and the touch electrodes.
17. The display device according to claim 16 , wherein the routing line is formed along a side surface of the touch buffer film.
18. The display device according to claim 16 , wherein the routing line contacts a side surface of the touch buffer film.
19. The display device according to claim 1 , wherein the display device is bendable and curvable.
20. The display device according to claim 19 , wherein an organic layer is disposed in a bendable and curvable region of the display device.
21. The display device according to claim 2 , wherein the routing line is configured to have a structure in which a plurality of routing layers, comprising a lower routing layer and an upper routing layer, is stacked.
22. The display device according to claim 21 , wherein
the lower routing layer and the upper routing layer have different widths, and
the lower routing layer and the upper routing layer have different thicknesses.
23. The display device according to claim 22 , wherein
a width of the lower routing layer is larger than a width of the upper routing layer, and
a thickness of the upper routing layer is larger than a thickness of the lower routing layer.
24. The display device according to claim 22 , wherein
the lower routing layer is disposed on a same layer and is made of a same material as one of the first bridge and the second bridge, and
the upper routing layer is disposed on a same layer and is made of a same material as the other of the first bridge and the second bridge.
25. The display device according to claim 21 , further comprising:
a touch pad connected to the routing line, wherein
at least one of the upper routing layer or the lower routing layer is connected to the touch pad.
26. The display device according to claim 21 , wherein the upper routing layer and the lower routing layer overlap each other on at least a portion of the encapsulation unit.
27. The display device according to claim 21 , further comprising an interlayer film disposed between the upper routing layer and the lower routing layer.
28. The display device according to claim 27 , wherein the interlayer film comprises one of a transparent conductive film and a transparent dielectric film.
29. The display device according to claim 27 , wherein at least one of the upper routing layer, the lower routing layer, or the interlayer film comprises one of Ti/Al/Ti and Mo/Al/Mo.
30. The display device according to claim 2 , further comprising:
a touch pad connected to the routing line, wherein
the touch pad is configured to have a structure in which a plurality of pad layers is stacked.
31. The display device according to claim 30 , wherein at least one of the pad layers is configured to have a multi-layered structure.
32. The display device according to claim 30 , wherein at least one of the pad layers comprises one of Ti/Al/Ti and Mo/Al/Mo.
33. The display device according to claim 30 , wherein at least one of the pad layers is disposed on a same layer and is made of a same material as at least one of the first bridge or the second bridge.
34. The display device according to claim 30 , wherein a total number of routing lines extending from a left side and a right side of the display device to the touch pad is equal to or different from a total number of routing lines extending from an upper side and a lower side of the display device to the touch pad.
35. The display device according to claim 30 , further comprising:
a thin film transistor connected to the light-emitting device, wherein
the thin film transistor comprises:
a gate electrode disposed on the substrate;
an active layer disposed on or under the gate electrode;
a source electrode connected to the active layer; and
a drain electrode connected to the active layer.
36. The display device according to claim 35 , wherein the routing line and the touch pad, disposed at an outer edge of the substrate, are disposed on one of a plurality of dielectric films located between the light-emitting device and the substrate.
37. The display device according to claim 36 , wherein
the dielectric films comprise:
a gate dielectric film disposed on the gate electrode and the active layer of the thin film transistor;
a passivation film disposed between the source and drain electrodes and the active layer of the thin film transistor; and
a planarization layer disposed on the source and drain electrodes.
38. The display device according to claim 37 , wherein the routing line overlaps at least one of the gate dielectric film, the passivation film, a bank configured to define a light-emitting region of the light-emitting device, the planarization layer, or the encapsulation unit at the outer edge of the substrate.
39. The display device according to claim 1 , wherein a distance between the substrate and the routing line is smaller than a distance between the substrate and the touch electrodes.
40. The display device according to claim 1 , wherein
the encapsulation unit comprises first and second inorganic encapsulation layers that face each other in a state in which an organic encapsulation layer is disposed therebetween,
the second inorganic encapsulation layer is disposed so as to cover an upper surface and a side surface of the organic encapsulation layer, and
the organic encapsulation layer is disposed so as to cover an upper surface and a side surface of the first inorganic encapsulation layer.