Display device and method of manufacturing the same
A display device includes a substrate, an emission structure disposed on the substrate, a first refraction pattern disposed on the emission structure, a second refraction pattern disposed on the first refraction pattern and covering the first refraction pattern, where the second refraction pattern includes an inorganic material, and a third refraction pattern disposed on the second refraction pattern and having a refractive index less than a refractive index of the first refraction pattern.
1 . A display device comprising:
a substrate;
an emission structure disposed on the substrate;
a first refraction pattern disposed on the emission structure, wherein the first refraction pattern has a trapezoidal cross-sectional shape;
a second refraction pattern disposed on the first refraction pattern and covering the first refraction pattern, wherein the second refraction pattern includes an inorganic material; and
a third refraction pattern disposed on the second refraction pattern and having a refractive index less than a refractive index of the first refraction pattern,
wherein a thickness of the second refraction pattern is less than a thickness of the first refraction pattern.
2 . The display device of claim 1 , wherein the second refraction pattern is disposed between the first refraction pattern and the third refraction pattern.
3 . The display device of claim 2 , wherein the second refraction pattern contacts the first refraction pattern and the third refraction pattern.
4 . The display device of claim 2 , wherein the second refraction pattern contacts a side surface of the first refraction pattern.
5 . The display device of claim 2 , wherein the first refraction pattern and the third refraction pattern do not contact each other.
6 . The display device of claim 1 , wherein a refractive index of the second refraction pattern is greater than the refractive index of the first refraction pattern.
7 . The display device of claim 6 , wherein the refractive index of the first refraction pattern is in a range of about 1.6 to about 1.7.
8 . The display device of claim 1 , wherein a refractive index of the second refraction pattern is greater than the refractive index of the third refraction pattern.
9 . The display device of claim 8 , wherein the refractive index of the third refraction pattern is in a range of about 1.4 to about 1.6.
10 . The display device of claim 1 , wherein the emission structure includes:
a first electrode;
a pixel defining layer disposed on the first electrode, wherein an opening exposing the first electrode is defined in the pixel defining layer;
an emission layer disposed in the opening; and
a second electrode disposed on the emission layer, and
wherein the first refraction pattern overlaps the opening.
11 . The display device of claim 1 , further comprising:
a touch electrode disposed on the emission structure; and
a cover pattern disposed in a same layer as the second refraction pattern and covering the touch electrode.
12 . The display device of claim 1 , further comprising:
a touch electrode disposed on the emission structure, and
wherein the second refraction pattern further covers the touch electrode.
13 . The display device of claim 1 , further comprising:
a fourth refraction pattern disposed between the second refraction pattern and the third refraction pattern.
14 . The display device of claim 13 , wherein a refractive index of the fourth refraction pattern is greater than the refractive index of the first refraction pattern, a refractive index of the second refraction pattern, and the refractive index of the third refraction pattern.
15 . The display device of claim 1 , wherein each of the first refraction pattern and the third refraction pattern includes an organic material.