Display device including touch sensor electrodes having a particular pitch
A display device according to an exemplary embodiment of the present system and method includes a substrate; a display active layer disposed on the substrate, the display active layer including a plurality of pixels that are configured to display a first color, a second color, and a third color, respectively, and a touch sensing layer disposed on the display active layer. The touch sensing layer includes first touch electrodes and second touch electrodes, which are separated from each other, and gaps between the first touch electrodes and the second touch electrodes. The gaps are formed to expose first color pixels configured to display the first color and non-pixel areas.
1. A display device comprising:
a first substrate;
a second substrate;
a display active layer disposed between the first substrate and the second substrate, the display active layer including a plurality of pixels that are configured to display a first color, a second color, and a third color, respectively, wherein each of the plurality of pixels includes a pixel electrode, a common electrode, and an emission layer between the pixel electrode and the common electrode; and
a touch sensing layer disposed on the second substrate, the touch sensing layer including first touch electrodes, second touch electrodes, and gaps between the first touch electrodes and the second touch electrodes in a plane view,
wherein the touch sensing layer is disposed as a separate layer from the common electrode such that the first touch electrodes are disposed as a separate layer from the common electrode,
the first touch electrodes and second touch electrodes are separated from each other and do not overlap each other in the plane view,
the first touch electrodes and the second touch electrodes form mutual capacitors functioning as touch sensors,
the gaps are formed to at least partially overlap the first color pixels and not to overlap an entirety of the second color pixels and an entirety of the third color pixels, and
each of the gaps includes a first portion extending in a first direction with a first width in the plane view and a second portion extending from the first portion in a second direction perpendicular to the first direction with a second width in the plane view.
2. The display device of claim 1 , wherein the touch sensing layer is free from dummy electrodes in the gaps.
3. The display device of claim 2 , wherein an edge of each of the first and second touch electrodes is formed in a stair shape.
4. The display device of claim 2 , wherein the first color pixels are green pixels.
5. The display device of claim 4 , wherein the gaps are formed to further expose second color pixels adjacent to the first color pixels.
6. The display device of claim 5 , wherein the second color pixels are blue pixels.
7. The display device of claim 5 , wherein the gaps are formed to further expose third color pixels adjacent to the first color pixels.
8. The display device of claim 7 wherein the third color pixels are red pixels.
9. The display device of claim 1 , wherein the first color pixel, the second color pixel, and the third color pixel constitute a unit pixel, and
a pitch of each of the first and second touch electrodes is an integer multiple of a pitch of the unit pixel, the pitch of a touch electrode being the distance between the centers of adjacent touch electrodes of the same type, and the pitch of a unit pixel being the distance between the centers of adjacent unit pixels.
10. The display device of claim 1 , wherein the first and second touch electrodes are formed of a transparent conductive oxide.
11. The display device of claim 10 , wherein the transparent conductive oxide is an indium tin oxide.
12. The display device of claim 10 , wherein the touch sensing layer further includes first connectors for connecting the first touch electrodes that are adjacent to each other; and second connectors for connecting the second touch electrodes that are adjacent to each other, and at least one of the first connector and the second connector is formed of a transparent conductive oxide.
13. The display device of claim 12 , wherein one of the first connector and the second connector includes a part formed of a transparent conductive oxide and a part formed of a metal material.
14. The display device of claim 1 , wherein the pixel includes a light-emitting device.
15. The display device of claim 1 , wherein an entirety of the touch sensing layer is disposed as a separate layer from the common electrode,
wherein the first touch electrode does not include any portion of the common electrode, and
wherein the second substrate does not include any portion of the touch sensing layer.
16. The display device of claim 1 , wherein the emission layer includes one of a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer, and the emission layer is configured to emit at least one of red, blue, and green light.