Patent ID: 9711579
Date: 2017-07-18
CPC Classifications: H01L

Claim:
1. An organic light emitting diode (OLED) display comprising: a substrate; a thin film transistor disposed on the substrate; a first electrode disposed on the thin film transistor and electrically connected to the thin film transistor; a second electrode facing the first electrode; an emission layer disposed between the first electrode and the second electrode; a first auxiliary layer disposed between the first electrode and the emission layer; an electron transport layer disposed between the emission layer and the second electrode; and a first buffer layer disposed between the electron transport layer and the second electrode, wherein the emission layer comprises a red light emitting layer, a green light emitting layer, and a blue light emitting layer, wherein the emission layer further comprises a second auxiliary layer disposed at a lower end of the blue light emitting layer, and wherein each of the red light emitting layer and the green light emitting layer does not overlap with the second auxiliary layer in a thickness direction of the organic light emitting diode display.