Organic light emitting display with touch sensor
Disclosed is an organic light emitting display device with a touch sensor. The display device has a touch sensor that is directly disposed on a sealing part, thus removing the necessity of an additional adhesion process, simplifying a manufacturing process and reducing manufacture cost. In addition, the display device with the touch sensor includes a display cover electrode of a display pad that is made of a same material as a conductive layer included in the touch sensor, thus preventing damage to the display pad electrode.
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, the plurality of touch electrodes comprising a plurality of first touch electrodes arranged in a first direction and a plurality of second touch electrodes arranged in a second direction that intersects the first direction;
a plurality of bridges disposed on the encapsulation unit, the plurality of bridges comprising first bridges configured to interconnect the plurality of first touch electrodes and second bridges configured to interconnect the plurality of second touch electrodes;
a routing line including a first routing line electrically connected to the plurality of first touch electrodes, and a second routing line electrically connected to the plurality of second touch electrodes,
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 are stacked,
wherein the upper routing layer and the lower routing layer overlap each other on at least a portion of the encapsulation unit, and
wherein the lower routing layer and the upper routing layer have different widths.
2. The display device according to claim 1 , further comprising:
a touch dielectric film disposed between the first bridges and the second bridges, wherein the plurality of first touch electrodes, the plurality of second touch electrodes, and the first bridges are disposed on the encapsulation unit,
wherein the second bridges are disposed on the touch dielectric film, and the second bridges are connected to the plurality of second touch electrodes, which are exposed through touch contact holes formed through the touch dielectric film.
3. The display device according to claim 2 , further comprising an auxiliary bridge disposed between the first bridges and the encapsulation unit, the auxiliary bridge connected to the first bridges.
4. The display device according to claim 2 ,
wherein the second bridges are disposed on the encapsulation unit,
wherein the plurality of first touch electrodes, the plurality of second touch electrodes, and the first bridges are disposed on the touch dielectric film, and
wherein the plurality of second touch electrodes are connected to the second bridges, which are exposed through touch contact holes formed through the touch dielectric film.
5. The display device according to claim 4 , wherein the second bridges are disposed between the plurality of first touch electrodes, the plurality of second touch electrodes, and the encapsulation unit.
6. The display device according to claim 1 , wherein at least one of the first bridges, the second bridges, the plurality of first touch electrodes, or the plurality of second touch electrodes is configured to have a structure in which a plurality of conductive films is stacked.
7. The display device according to claim 6 , wherein at least one of the plurality of conductive films is configured to have a multi-layered structure.
8. The display device according to claim 6 , wherein at least one of the plurality of conductive films is configured to have a multi-layered structure comprising one of aluminum Al, titanium Ti, copper Cu, molybdenum Mo, indium tin oxide ITO, or indium zinc oxide IZO.
9. The display device according to claim 6 , wherein at least one of the plurality of conductive films comprises one of titanium, aluminum, and titanium or molybdenum, aluminum, and molybdenum.
10. The display device according to claim 1 , wherein at least one of the plurality of first touch electrodes, the plurality of second touch electrodes, the first bridges, or the second bridges comprises a mesh-shaped conductive film having an opening formed therein.
11. The display device according to claim 10 , wherein the mesh-shaped conductive film overlaps a bank configured to define a light-emitting region of the light-emitting device.
12. The display device according to claim 11 , wherein the opening overlaps the light-emitting region.
13. The display device according to claim 11 , 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 , further comprising a touch buffer film disposed between the encapsulation unit and the plurality of touch electrodes.
16. The display device according to claim 1 , wherein a width of the lower routing layer is greater than a width of the upper routing layer.
17. The display device according to claim 1 , wherein the lower routing layer and the upper routing layer have different thicknesses, and a thickness of the upper routing layer is greater than a thickness of the lower routing layer.
18. The display device according to claim 1 , wherein the lower routing layer is disposed on a same layer and is made of a same material as one of the first bridges and the second bridges, and the upper routing layer is disposed on a same layer and is made of a same material as another one of the first bridges and the second bridges.
19. The display device according to claim 1 , 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.
20. The display device according to claim 1 , wherein the encapsulation unit comprises a first inorganic encapsulation layer and a second inorganic encapsulation layer that face each other in a state in which an organic encapsulation layer is disposed therebetween,
wherein the second inorganic encapsulation layer is disposed so as to cover an upper surface and a side surface of the organic encapsulation layer, and
wherein the organic encapsulation layer is disposed so as to cover an upper surface and a side surface of the first inorganic encapsulation layer.