Organic light emitting diode display
An organic light emitting diode display includes a first substrate, an organic light emitting diode on the first substrate, a second substrate on the organic light emitting diode, and a capping layer between the second substrate and the organic light emitting diode. The capping layer collects light emitted from the organic light emitting diode, and the capping layer collects the light in a direction of the second substrate corresponding to the organic light emitting diode.
1. An organic light emitting diode display, comprising:
a first substrate;
an organic light emitting diode on the first substrate;
a second substrate on the organic light emitting diode; and
a capping layer between the second substrate and the organic light emitting diode, the capping layer collecting light emitted from the organic light emitting diode, the capping layer collecting the light in a direction of the second substrate corresponding to the organic light emitting diode, wherein the capping layer includes:
a plurality of high refractive patterns separated from each other; and
a low refractive pattern provided between neighboring high refractive patterns.
2. The organic light emitting diode display of claim 1 , wherein the low refractive pattern contacts the high refractive patterns.
3. The organic light emitting diode display of claim 1 , wherein each of the plurality of high refractive patterns has a greater refractive index than the low refractive pattern.
4. The organic light emitting diode display of claim 1 , wherein each of the plurality of the high refractive patterns has an inversely tapered end surface.
5. The organic light emitting diode display of claim 1 , wherein:
the organic light emitting diode includes:
a first electrode on the first substrate;
an organic emission layer that is on the first electrode and that emits the light; and
a second electrode on the organic emission layer, and
the capping layer collects the light that is irradiated in a direction away from the first electrode from the organic emission layer, the capping layer collecting the light in the direction of the second substrate corresponding to the first electrode.
6. The organic light emitting diode display of claim 5 , wherein:
the first electrode is a light reflective electrode, and
the second electrode is a light transmissive electrode.
7. The organic light emitting diode display of claim 5 , wherein the first electrode is one of a plurality of first electrodes, the plurality of first electrodes being separated from each other.
8. The organic light emitting diode display of claim 7 , wherein:
the organic emission layer emits white light,
the second substrate includes:
a plurality of color filters provided corresponding to the first electrodes; and
a black matrix provided between the color filters, and
the capping layer collects the light that is irradiated in a direction away from the color filter from the organic emission layer, the capping layer collecting the light in a direction of the color filter.
9. The organic light emitting diode display of claim 8 , wherein the color filters includes:
a first color filter having a first color;
a second color filter separated from the first color filter with the black matrix therebetween, the second color filter having a second color, and
a third color filter separated from the second color filter with the black matrix therebetween, the third color filter having a third color.
10. An organic light emitting diode display, comprising:
a first substrate;
an organic light emitting diode on the first substrate;
a second substrate on the organic light emitting diode; and
a capping layer between the second substrate and the organic light emitting diode, the capping layer collecting light emitted from the organic light emitting diode, the capping layer collecting the light in a direction of the second substrate corresponding to the organic light emitting diode,
wherein the capping layer includes a high refractive layer that is separated from the organic light emitting diode and that contacts the second substrate.
11. The organic light emitting diode display of claim 10 , wherein the capping layer further includes an air layer between the high refractive layer and the organic light emitting diode.
12. The organic light emitting diode display of claim 11 , wherein the capping layer further includes an intermediate refractive layer between the high refractive layer and the air layer.
13. The organic light emitting diode display of claim 12 , wherein the intermediate refractive layer contacts the high refractive layer and the air layer.
14. The organic light emitting diode display of claim 12 , wherein the intermediate refractive layer has a refractive index between a refractive index of the high refractive layer and a refractive index of the air layer.
15. The organic light emitting diode display of claim 10 , wherein the capping layer further includes a low refractive layer between the high refractive layer and the organic light emitting diode.
16. The organic light emitting diode display of claim 15 , wherein the low refractive layer contacts the high refractive layer and the organic light emitting diode.
17. The organic light emitting diode display of claim 15 , wherein a refractive index of the low refractive layer is less than a refractive index of the high refractive layer.
18. The organic light emitting diode display of claim 15 , wherein the capping layer further includes an intermediate refractive layer between the high refractive layer and the low refractive layer.
19. The organic light emitting diode display of claim 18 , wherein the intermediate refractive layer contacts the high refractive layer and the low refractive layer.
20. The organic light emitting diode display of claim 18 , wherein the intermediate refractive layer has a refractive index between a refractive index of the high refractive layer and a refractive index of the low refractive layer.