Patent ID: 11943946
Assignee: LG DISPLAY CO., LTD.
Field: nan (nan)
Classification: CPC nan | IPC H

Claim 13:
14. A display device comprising:
a substrate comprising a thin film transistor provided in each of a plurality of subpixels;
a first electrode connected to the thin film transistor in each subpixel, and a second electrode spaced apart from the first electrode and provided throughout the plurality of subpixels; and
at least one blue light emitting stack and a phosphorescent light emitting stack, provided between the first electrode and the second electrode and separated from each other by a charge generation layer,
wherein the phosphorescent light emitting stack comprises a hole transport layer, a red light emitting layer for emitting a single red color on the hole transport layer, a green light emitting layer on the red light emitting layer, and an electron transport layer on the green light emitting layer,
wherein the red light emitting layer comprises a red dopant and red hosts,
wherein the hole transport layer is positioned between the charge generation layer and the red light emitting layer, and
wherein the red dopant has a highest occupied molecular orbital (HOMO) energy level lower than a HOMO energy level of the hole transport layer, and higher than a HOMO energy level of the red hosts.