Display device

1. A display device comprising:

a display unit including a first region, which is flat, and second regions, which are curved; and

a touch sensor layer disposed on the display unit,

wherein:

the touch sensor layer comprises a high refractive index layer having a first refractive index and a planarization layer disposed on the high refractive index layer and having a second refractive index, which is smaller than the first refractive index;

the high refractive index layer includes pattern parts;

the pattern parts comprise first pattern parts disposed in the first region and second pattern parts disposed in the second regions;

each of the first pattern parts comprises a plurality of protrusions and a plurality of depressions;

each of the second pattern parts comprises a plurality of protrusions and a plurality of depressions;

the depressions of each of the first pattern parts have a first pitch; and

the depressions of each of the second pattern parts have a second pitch, which is smaller than the first pitch.

2. The display device of claim 1 , wherein:

each of the first region and the second regions includes light-emitting areas and non-light-emitting areas;

the first pattern parts overlap with the light-emitting areas of the first region in a thickness direction; and

the second pattern parts overlap with the light-emitting areas of each of the second regions in the thickness direction.

3. The display device of claim 2 , wherein each of the light-emitting areas includes a first electrode, a light-emitting layer, and a second electrode.

4. The display device of claim 2 , further comprising a buffer layer disposed between the touch sensor layer and the display unit,

wherein the buffer layer has a third refractive index greater than the first refractive index.

5. The display device of claim 4 , wherein the high refractive index layer comprises a first high refractive index layer disposed on the buffer layer and a second high refractive index layer disposed on the first high refractive index layer.

6. The display device of claim 5 , wherein:

the touch sensor layer includes driving electrodes and sensing electrodes; and

the driving electrodes and the sensing electrodes are disposed between the first and second high refractive index layers.

7. The display device of claim 6 , wherein the driving electrodes and the sensing electrodes do not overlap with the pattern parts in the thickness direction.

8. The display device of claim 7 , wherein:

the first high refractive index layer comprises first depressions and first protrusions;

the second high refractive index layer comprises second depressions and second protrusions; and

the first depressions overlap with the second depressions in the thickness direction.

9. The display device of claim 4 , further comprising:

a light-shielding member disposed on the planarization layer;

a color filter layer disposed on the planarization layer and on the light-shielding member; and

an overcoat layer disposed on the color filter layer,

wherein the light-shielding member does not overlap with the pattern parts in the thickness direction.

10. The display device of claim 9 , further comprising a light path changing layer disposed on the overcoat layer,

wherein:

the light path changing layer comprises a first light path changing layer disposed on the overcoat layer and a second light path changing layer disposed on the first light path changing layer and on the overcoat layer; and

the first light path changing layer does not overlap with the pattern parts in the thickness direction.

11. The display device of claim 10 , wherein:

the first light path changing layer has a fourth refractive index; and

the second light path changing layer has a fifth refractive index, which is greater than the fourth refractive index.

12. The display device of claim 11 , wherein a maximum thickness of the second light path changing layer is greater than a maximum thickness of the first light path changing layer.

13. A display device comprising:

a display unit including light-emitting areas and non-light-emitting areas; and

a touch sensor layer disposed on the display unit,

wherein:

the touch sensor layer comprises a high refractive index layer, which includes pattern parts that overlap with the light-emitting areas in a thickness direction, and touch electrodes, which overlap with the non-light-emitting areas in the thickness direction; and

each of the pattern parts comprises a plurality of protrusions and a plurality of depressions.

14. The display device of claim 13 , wherein the touch sensor layer further comprises a planarization layer disposed on the high refractive index layer and having a smaller refractive index than the high refractive index layer.

15. The display device of claim 14 , further comprising a buffer layer disposed between the display unit and the high refractive index layer and having a greater refractive index than the high refractive index layer.

16. The display device of claim 15 , wherein:

the display unit includes a first region, which is flat, and second regions, which are curved; and

the depressions have a first pitch in the first region and a second pitch, which is smaller than the first pitch, in the second regions.