Organic light emitting display including an optical path controller
View Patent ↗An organic light emitting display according to an exemplary embodiment of the present invention includes a transistor arranged on an insulating substrate, a pixel electrode connected to the transistor and including a reflective film, an optical path controller arranged on the pixel electrode, an auxiliary electrode arranged on the pixel electrode and the optical path controller, an organic light emitting member arranged on the organic light emitting member, and a common electrode arranged on the organic light emitting member, wherein the optical path controller has a lower light absorption coefficient than the auxiliary electrode.
1. An organic light emitting display comprising:
an insulating substrate having a first area, a second area, and a third area;
a plurality of transistors arranged on the insulating substrate;
an insulating layer arranged on the transistors;
a first pixel electrode, a second pixel electrode, and a third pixel electrodes arranged on the insulating layer in the first area, the second area, and the third area, respectively, and connected to the transistors;
an optical path controller arranged on the first pixel electrode;
a plurality of auxiliary electrodes arranged on the first pixel electrode, the second electrode, the third pixel electrode and the optical path controller;
a partition wall having a plurality of openings that expose a portion of the auxiliary electrodes;
an organic light emitting member arranged on the auxiliary electrodes; and,
a common electrode arranged on the organic light emitting member,
wherein the optical path controller covers the lateral side of the first pixel electrode.
2. The organic light emitting display of claim 1 , wherein each of the first pixel electrode, the second pixel electrode, and the third pixel electrode comprises a reflective film and a transparent conductive film, and the optical path controller has a lower light absorption coefficient than one or both of the transparent conductive film and the auxiliary electrodes.
3. The organic light emitting display of claim 2 , wherein the optical path controller comprises silicon oxide or silicon nitride.
4. The organic light emitting display of claim 3 , wherein the third pixel electrode is connected to the auxiliary electrode.
5. The organic light emitting display of claim 4 , wherein the optical path controller is disposed on the first pixel electrode and corresponds to the opening.
6. The organic light emitting display of claim 4 , wherein the auxiliary electrodes cover the sides of the optical path controller, and the first pixel electrode, the second pixel electrode, and the third pixel electrode.
7. The organic light emitting display of claim 4 , wherein the auxiliary electrodes have the same shape as the pixel electrodes.
8. The organic light emitting display of claim 2 , wherein the reflective film comprises at least one of silver, silver alloy, aluminum, or aluminum alloy.
9. The organic light emitting display of claim 8 , wherein each of the first pixel electrode, the second pixel electrode, and the third pixel electrode further comprises a metal oxide film under the reflective film.
10. The organic light emitting display of claim 9 , wherein the transparent conductive film and the metal oxide film comprise indium tin oxide or indium zinc oxide.
11. The organic light emitting display of claim 10 , wherein the transparent conductive film, the reflective film and the metal oxide film have substantially the same shape.
12. An organic light emitting display of claim 1 , wherein an optical path length is the same between the common electrode and the second pixel electrode and the common electrode and the third pixel electrode.