Display device

1. A display device comprising:

a display panel including a light-emitting device to emit light; and

an input sensor disposed over the display panel,

wherein the input sensor comprises:

a first insulating layer disposed over the display panel;

a first conductive layer disposed over the first insulating layer;

a second insulating layer covering the first conductive layer; and

a second conductive layer disposed over the second insulating layer,

wherein at least one of the first and second insulating layers comprises a plurality of diffraction patterns arranged to diffract at least a portion of the light provided from the display panel, wherein:

the display panel further comprises an encapsulation layer covering the light-emitting device, and

the first insulating layer is directly disposed on the encapsulation layer.

2. The display device of claim 1 , wherein the plurality of diffraction patterns are disposed in the second insulating layer.

3. The display device of claim 1 , wherein the plurality of diffraction patterns are disposed in the first insulating layer.

4. The display device of claim 1 , wherein the plurality of diffraction patterns comprise:

a plurality of first diffraction patterns disposed in the first insulating layer; and

a plurality of second diffraction patterns disposed in the second insulating layer.

5. The display device of claim 4 , wherein the first insulating layer has a multi-layered structure including at least two stacked sub-insulating layers.

6. The display device of claim 5 , wherein the plurality of first diffraction patterns comprise:

a plurality of first sub-diffraction patterns disposed in a first sub-insulating layer of the first insulating layer; and

a plurality of second sub-diffraction patterns disposed in a second sub-insulating layer of the first insulating layer and overlapping the plurality of first sub-diffraction patterns,

wherein the plurality of second diffraction patterns are disposed in the second insulating layer overlapping the plurality of second sub-diffraction patterns.

7. The display device of claim 1 , wherein the encapsulation layer comprises:

a first encapsulation layer covering a plurality of pixels;

a second encapsulation layer disposed on the first encapsulation layer; and

a third encapsulation layer disposed on the second encapsulation layer,

wherein the first insulating layer is disposed on the third encapsulation layer.

8. The display device of claim 7 , wherein:

the first insulating layer has a multi-layered structure including at least two stacked sub-insulating layers, and

the plurality of diffraction patterns comprise:

a plurality of first diffraction patterns disposed in the at least two sub-insulating layers; and

a plurality of second diffraction patterns disposed in the second insulating layer.

9. The display device of claim 8 , wherein the plurality of diffraction patterns further comprise a plurality of third diffraction patterns disposed in the third encapsulation layer overlapping the plurality of first diffraction patterns.

10. The display device of claim 1 , wherein the plurality of diffraction patterns comprise a plurality of holes penetrating the at least one of the first and second insulating layers.

11. The display device of claim 10 , wherein the plurality of holes have one of generally circular, polygonal, elliptical, and elongated shapes.

12. The display device of claim 1 , wherein the plurality of diffraction patterns comprise columnar-shaped structures disposed in the at least one of the first and second insulating layers.

13. The display device of claim 12 , wherein the columnar-shaped structures have one of generally circular, polygonal, elliptical, and elongated shapes.

14. The display device of claim 1 , wherein:

the input sensor further comprises a protection layer disposed on the second insulating layer, and

each of the first and second insulating layers has a refractive index different from a refractive index of the protection layer.

15. The display device of claim 1 , wherein:

the display panel comprises a plurality of pixels, and

each of the plurality of pixels comprises:

an emission region to emit light, the light-emitting device being disposed in the emission region; and

a non-emission region adjacent to the emission region.

16. The display device of claim 15 , wherein the plurality of diffraction patterns overlap at least the emission region.

17. The display device of claim 15 , wherein the plurality of diffraction patterns overlap the non-emission region.

18. The display device of claim 1 , wherein:

the display panel comprises a plurality of pixels including a first pixel to emit a first light, a second pixel to emit a second light having a wavelength different from a wavelength of the first light, and a third pixel to emit a third light having a wavelength different from the wavelength of the first light and the wavelength of the second light, and

the plurality of diffraction patterns overlap at least one of the first to third pixels.

19. The display device of claim 18 , wherein the plurality of diffraction patterns overlap the first pixel.

20. The display device of claim 18 , wherein the plurality of diffraction patterns overlap the first and third pixels.

21. A display device comprising:

a display panel comprising a plurality of pixels to display an image, each of the plurality of pixels including a light-emitting device to emit light; and

an input sensor disposed over the display panel,

wherein the input sensor comprises:

a sensing electrode; and

an insulating layer disposed over or below the sensing electrode, the insulating layer comprising a plurality of diffraction patterns arranged to diffract at least a portion of the light provided from the display panel, the plurality of diffraction patterns overlapping at least one of the plurality of pixels, wherein:

the display panel further comprises an encapsulation layer covering the plurality of pixels, and

the input sensor comprises an input-sensing unit directly disposed on the encapsulation layer.

22. The display device of claim 21 , wherein:

the sensing electrode comprises a first sensing electrode and a second sensing electrode intersecting each other, and

each of the first and second sensing electrodes comprises sensing portions and a connecting portion connecting adjacent ones of the sensing portions.

23. The display device of claim 22 , wherein the insulating layer comprises:

a first insulating layer on which the connecting portion of the first sensing electrode is disposed; and

a second insulating layer on which the sensing portions of the first sensing electrode, the sensing portions of the second sensing electrode, and the connecting portion of the second sensing electrode are disposed,

wherein the second insulating layer covers the connecting portion of the first sensing electrode, and

the connecting portion of the first sensing electrode is electrically connected to the sensing portions of the first sensing electrode through a contact hole formed in the second insulating layer.

24. The display device of claim 23 , wherein the plurality of diffraction patterns are disposed in at least one of the first and second insulating layers.

25. The display device of claim 24 , wherein the plurality of diffraction patterns comprise a plurality of holes penetrating at least one of the first and second insulating layers.

26. The display device of claim 23 , further comprising a protection layer disposed on the second insulating layer to cover the sensing portions of the first sensing electrode, the sensing portions of the second sensing electrode, and the connecting portion of the second sensing electrode.

27. The display device of claim 26 , wherein:

the insulating layer further comprises a third insulating layer disposed between the protection layer and the second insulating layer, and

the plurality of diffraction patterns are disposed in the third insulating layer.

28. The display device of claim 23 , wherein:

the plurality of diffraction patterns are disposed in the second insulating layer, and

the insulating layer further comprises a fourth insulating layer disposed below the first insulating layer.

29. The display device of claim 23 , wherein:

the plurality of diffraction patterns are disposed in the second insulating layer, and

the insulating layer further comprises a fifth insulating layer disposed between the first and second insulating layers.

30. The display device of claim 23 , wherein:

the plurality of diffraction patterns are disposed on the first insulating layer, and

the second insulating layer comprises a diffraction open portion overlapping the plurality of diffraction patterns formed on the first insulating layer.

31. The display device of claim 21 , wherein each of the sensing portions of the first and second sensing electrodes comprises a mesh electrode having a mesh shape.

32. The display device of claim 31 , wherein the plurality of diffraction patterns are not overlapped with the mesh electrode, when viewed in plan.

33. The display device of claim 21 , wherein:

the plurality of pixels comprise a first pixel to emit a first light, a second pixel to emit a second light having a wavelength different from a wavelength of the first light, and a third pixel to emit a third light having a wavelength different from the wavelength of the first light and the wavelength of the second light, and

the plurality of diffraction patterns overlap at least one of the first to third pixels.

34. The display device of claim 33 , wherein the plurality of diffraction patterns overlap the first pixel.

35. The display device of claim 33 , wherein the plurality of diffraction patterns overlap the first and third pixels.

36. A display device comprising:

a display panel comprising a plurality of pixels to display an image and an encapsulation layer covering the plurality of pixels, each of the plurality of pixels including a light-emitting device to emit light;

a diffraction pattern layer including a plurality of diffraction patterns arranged on the display panel to diffract at least a portion of the light provided from the display panel; and

an input sensor disposed on the display panel,

wherein the plurality of diffraction patterns overlap at least one of the plurality of pixels, and wherein:

the diffraction pattern layer is disposed between the display panel and the input sensor or is disposed on the input sensor, and

the input sensor is directly disposed on the encapsulation layer.

37. The display device of claim 36 , wherein:

the plurality of pixels comprise a first pixel to emit a first light, a second pixel to emit a second light, and a third pixel to emit a third light, and

the plurality of diffraction patterns overlap at least one of the first to third pixels.

38. The display device of claim 37 , wherein the plurality of diffraction patterns overlap the first pixel.

39. The display device of claim 37 , wherein the plurality of diffraction patterns overlap the first and third pixels.

40. The display device of claim 36 , wherein the input sensor comprises an input-sensing unit including:

a first insulating layer directly disposed on the encapsulation layer;

a first conductive layer disposed on the first insulating layer;

a second insulating layer covering the first conductive layer;

a second conductive layer disposed on the second insulating layer; and

a protection layer covering the second conductive layer and the second insulating layer.

41. The display device of claim 40 , wherein the diffraction pattern layer is disposed on the protection layer.

42. The display device of claim 40 , wherein the diffraction pattern layer is disposed between the encapsulation layer and the first insulating layer.