公开(公告)号：US20230255078A1

公开(公告)日：2023-08-10

申请号：US18078886

申请日：2022-12-09

Applicant: LG Display Co., Ltd.

Inventor： Wook Song ,  Yu Jeong Lee ,  Byung Gun Ahn ,  Mi Young Han ,  Chun Ki Kim ,  Sae Mi Park ,  Jung Keun Kim ,  Byung Soo Kim

IPC: H10K59/35 ,  H10K50/13 ,  H10K50/17 ,  H10K50/16 ,  H10K59/38 ,  C07D401/14 ,  C07D209/08

CPC classification number: H01L27/3213 ,  C07D209/08 ,  C07D401/14 ,  H01L27/322 ,  H01L51/504 ,  H01L51/5072 ,  H01L51/5092

Abstract: A light emitting device is capable of improving the efficiency in the visible light wavelength in a structure in which light extraction efficiency is improved through a microlens array. The light emitting display device includes a substrate having a plurality of subpixels, each comprising a light emitting region and a non-light emitting region, an over-coating layer having irregularities on a surface thereof in at least the light emitting region, and a light emitting device disposed on the surface of the over-coating layer, the light emitting device comprising an anode and a cathode facing each other, and at least two blue stacks and a phosphorescent stack between the anode and the cathode, at least one of the blue stacks is the blue light emitting layer and includes an electron transport layer including a first material, the electron transport layer being in contact with the blue light emitting layer.