Organic light emitting display apparatus

Abstract

An organic light-emitting display apparatus includes: a pixel electrode, an intermediate layer on the pixel electrode and including an emission layer, an opposite electrode on the pixel electrode such that the intermediate layer is therebetween, an inorganic encapsulation layer on the opposite electrode, an organic encapsulation layer on the inorganic encapsulation layer, and a protection layer on the organic encapsulation layer and including a first protection layer including silicon nitride and a second protection layer including silicon oxynitride.

What is claimed is: 
     
         1 . An organic light-emitting display apparatus comprising:
 a pixel electrode;   an intermediate layer on the pixel electrode, the intermediate layer comprising an emission layer;   an opposite electrode on the pixel electrode such that the intermediate layer is therebetween;   an inorganic encapsulation layer on the opposite electrode;   an organic encapsulation layer on the inorganic encapsulation layer; and   a protection layer on the organic encapsulation layer, the protection layer comprising:
 a first protection layer on the organic encapsulation layer, the first protection layer comprising an inorganic material including a nitride, and having a first refractive index; and 
 a second protection layer on the first protection layer, the second protection layer comprising an inorganic material including oxygen and a nitride, and having a second refractive index, 
   wherein the protection layer comprises two pairs of the first protection layer and the second protection layer,   wherein, in each of the two pairs of the first protection layer and the second protection layer, the first protection layer is closer to the organic encapsulation layer than the second protection layer is to the organic encapsulation layer, and   wherein the first protection layer of a second one of the two pairs is on the second protection layer of a first one of the two pairs.   
     
     
         2 . The organic light-emitting display apparatus of  claim 1 , wherein the first protection layer of the second one of the two pairs contacts the second protection layer of the first one of the two pairs. 
     
     
         3 . The organic light-emitting display apparatus of  claim 1 , further comprising an additional protection layer on the protection layer, the additional protection layer comprising an inorganic material including a nitride. 
     
     
         4 . The organic light-emitting display apparatus of  claim 1 , wherein the first refractive index of the first protection layer is greater than the second refractive index of the second protection layer. 
     
     
         5 . The organic light-emitting display apparatus of  claim 4 , wherein the first refractive index of the first protection layer is 1.79 or more and 2.10 or less, and the second refractive index of the second protection layer is 1.62 or more and 1.70 or less. 
     
     
         6 . The organic light-emitting display apparatus of  claim 4 , wherein a difference between the first refractive index of the first protection layer and the second refractive index of the second protection layer is 0.09 or more and 0.48 or less. 
     
     
         7 . The organic light-emitting display apparatus of  claim 4 , wherein a thickness of the first protection layer is 350 Å or more and 500 Å or less, and a thickness of the second protection layer is 600 Å or more and 700 Å or less.