Display device

1. A display device comprising:

a substrate;

a transistor on the substrate;

a first electrode electrically connected to the transistor;

a pixel defining layer on the first electrode, the pixel defining layer including a pixel opening overlapping the first electrode;

an emission layer and a second electrode overlapping the first electrode;

a touch electrode on the second electrode;

a first low refraction layer and a second low refraction layer overlapping the touch electrode; and

a high refraction layer on the second low refraction layer,

wherein the first low refraction layer includes a first opening,

wherein the second low refraction layer includes a second opening,

wherein the first opening, the second opening, and the pixel opening have different widths in a first diagonal direction, and

wherein a part of the touch electrode is between the first low refraction layer and the second low refraction layer.

2. The display device of claim 1 , wherein the first low refraction layer and the second low refraction layer have different refractive indexes.

3. The display device of claim 1 , wherein the second opening is smaller in width in the first diagonal direction than the first opening.

4. The display device of claim 1 , wherein the first opening, the second opening, and the pixel opening have different widths in a second diagonal direction.

5. The display device of claim 4 , wherein the first opening is smaller in width in the second diagonal direction than the second opening.

6. The display device of claim 4 , wherein an end of the second low refraction layer is on an upper surface of the first low refraction layer in the second diagonal direction.

7. The display device of claim 4 , wherein the first diagonal direction and the second diagonal direction are perpendicular to each other.

8. The display device of claim 4 , wherein the second opening is smaller in width in the second diagonal direction than the first opening.

9. The display device of claim 1 , wherein an end of the second low refraction layer covers an end of the first low refraction layer in the first diagonal direction.

10. The display device of claim 1 , wherein the first opening is smaller in width in the first diagonal direction than the second opening.

11. The display device of claim 1 , wherein the display device comprises a plurality of pixels on the substrate,

wherein the plurality of pixels comprises a first color pixel, a second color pixel, and a third color pixel, and

wherein the first electrode, the pixel opening, the first opening, and the second opening are on a corresponding one of the plurality of pixels.

12. The display device of claim 1 , wherein a refractive index of the second low refraction layer is greater than a refractive index of the first low refraction layer, and

wherein a refractive index of the high refraction layer is greater than a refractive index of the second low refraction layer.

13. A display device comprising:

a substrate;

a transistor on the substrate;

a first electrode electrically connected to the transistor;

a pixel defining layer on the first electrode, the pixel defining layer including a pixel opening overlapping the first electrode;

an emission layer and a second electrode overlapping the first electrode;

a touch electrode on the second electrode;

a first low refraction layer and a second low refraction layer overlapping the touch electrode; and

a high refraction layer on the second low refraction layer,

wherein part of the touch electrode is between the first low refraction layer and the second low refraction layer,

wherein the first low refraction layer includes a first opening,

wherein the second low refraction layer includes a second opening, and

wherein the first opening and the second opening have a circular shape or an oval shape in a plan view.

14. The display device of claim 13 , wherein a refractive index of the second low refraction layer is greater than a refractive index of the first low refraction layer.

15. The display device of claim 13 , wherein the first low refraction layer and the second low refraction layer comprise an organic material.

16. The display device of claim 13 , wherein the display device further comprises:

an encapsulation layer on the second electrode; and

a first inorganic insulating layer on the encapsulation layer.

17. The display device of claim 16 , wherein the display device further comprises a light blocking layer between a first touch insulating layer and the high refraction layer.

18. The display device of claim 13 , wherein the second opening is smaller in width in a first diagonal direction than the first opening, and

wherein the first opening is smaller in width in a second diagonal direction than the second opening.

19. The display device of claim 18 , wherein an end of the second low refraction layer covers an end of the first low refraction layer in the first diagonal direction, and

wherein an end of the second low refraction layer is on an upper surface of the first low refraction layer in the second diagonal direction.

20. The display device of claim 13 , wherein the first opening is smaller in width in a first diagonal direction than the second opening, and

wherein the second opening is smaller in width in a second diagonal direction than the first opening.