公开(公告)号：US20230217766A1

公开(公告)日：2023-07-06

申请号：US17976587

申请日：2022-10-28

Applicant: LG Display Co., Ltd.

Inventor： Hong Seok CHOI ,  Ju Hyuk KWON ,  Shin Young JEONG ,  Hyun Jin CHO

IPC: H01L27/32 ,  H01L51/50 ,  H01L27/12

CPC classification number: H01L27/3218 ,  H01L27/322 ,  H01L51/504 ,  H01L27/1225 ,  H01L27/3262

Abstract: Disclosed is a display device including a substrate at an exit side, first to third color subpixels provided on the substrate, each of the color subpixels having a thin film transistor, first to third color filters provided respectively at the first to third color subpixels, first to third anodes provided respectively on the first to third color filters so as to be connected to the thin film transistors, an emission unit commonly provided at the first to third color subpixels on the first to third anodes, the emission unit including at least two blue fluorescent stacks and two phosphorescent stacks, and a cathode provided on the emission unit, wherein the first to third color subpixels constitute a basic unit, and a third color subpixel of an n-th basic unit neighbors a first color subpixel of an (n+1)-th basic unit in the same row or column on the substrate.

公开(公告)号：US20230217672A1

公开(公告)日：2023-07-06

申请号：US17976180

申请日：2022-10-28

Applicant: LG Display Co., Ltd.

Inventor： Hong Seok CHOI ,  Hyun Jin CHO ,  Sun hee LEE

IPC: H01L51/50

CPC classification number: H01L51/5044 ,  H01L2251/5376

Abstract: A light emitting device including a first electrode and a second electrode facing each other, a blue fluorescent light emitting layer and a non-blue phosphorescent light emitting layer in contact with each other between the first electrode and the second electrode, a first common layer between the first electrode and the non-blue phosphorescent light emitting layer, and a second common layer between the blue fluorescent light emitting layer and the second electrode. The non-blue phosphorescent light emitting layer includes a first host, and a first dopant having a first triplet excitation level and a first singlet-triplet excitation level difference. The blue fluorescent light emitting layer includes a second dopant having: a second singlet-triplet excitation level difference that is smaller than the first singlet-triplet excitation level difference, and a second triplet excitation level that is higher than the first triplet excitation level, and a second host.