Patent ID: 8847215

Claim:
An organic light-emitting diode comprising: a substrate on which a red pixel area, a green pixel area, and a blue pixel area are defined; an anode disposed on the substrate and corresponding to the red pixel area, the green pixel area, and the blue pixel area; a first hole transporting layer disposed on the anode and corresponding to the red pixel area, the green pixel area, and the blue pixel area; a second hole transporting layer disposed on the first hole transporting layer and corresponding to the red pixel area and the green pixel area, the second hole transporting layer having a uniform thickness; a first emitting material pattern disposed on the second hole transporting layer and corresponding to the red pixel area, the first emitting material pattern having a first thickness; a second emitting material pattern disposed on the second hole transporting layer and corresponding to the green pixel area, the second emitting material pattern having a second thickness; a third emitting material pattern disposed on the first hole transporting layer and corresponding to the blue pixel area, the third emitting material pattern having a third thickness; an electron transporting layer disposed on the first emitting material pattern, the second emitting material pattern, and the third emitting material pattern and corresponding to the red pixel area, the green pixel area, and the blue pixel area; and a cathode disposed on the electron transporting layer and corresponding to the red pixel area, the green pixel area, and the blue pixel area, wherein the second thickness is less than the first thickness and greater than the third thickness, and wherein an electron blocking layer is formed between the second hole transporting layer and each of the first and second emitting material patterns, and between the third emitting material pattern and the first hole transporting layer.