Patent ID: 7535167

Claim:
An organic light emitting device comprising: a substrate; a first electrode on the substrate; a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode, and comprising an emissive layer and an electron transport layer, wherein the emissive layer comprises: a red emissive layer, a green emissive layer, and a blue emissive layer, wherein the electron transport layer comprises: a first electron transport layer comprising at least one selected from the group consisting of a first layer on the red emissive layer and having substantially the same pattern as that of the red emissive layer, a second layer on the green emissive layer and having substantially the same pattern as that of the green emissive layer, and a third layer on the blue emissive layer and having substantially the same pattern as that of the blue emissive layer; and a second electron transport layer on the first electron transport layer as a common layer with respect to red, green, and blue sub-pixels, and wherein the first electron transport layer comprises the first layer, the second layer, and the third layer.