Patent ID: 8878206

Claim:
An organic light emitting display apparatus comprising: a plurality of sub-pixel regions comprising: a red sub-pixel region; a green sub-pixel region; and a blue sub-pixel region, each of the sub-pixel regions comprising a first electrode on a substrate; a distributed Bragg reflector (DBR) layer between the substrate and the first electrode; a hole injection layer on the DBR layer and covering the first electrode; a hole transport layer on the hole injection layer; an auxiliary layer between the hole injection layer and the hole transport layer in the green sub-pixel region; a green light-emission layer on the hole transport layer in the blue sub-pixel region and the green sub-pixel region; a blue light-emission layer on the green light-emission layer in only the blue sub-pixel region; and a red light-emission layer on the hole transport layer in only the red sub-pixel region.