公开(公告)号：US10056571B2

公开(公告)日：2018-08-21

申请号：US15163462

申请日：2016-05-24

Applicant: LG DISPLAY CO., LTD.

Inventor： Yoondeok Han ,  Hongseok Choi ,  SoYeon Ahn ,  JungSoo Park ,  Yosub Lee

IPC: H01L51/50 ,  H01L51/52 ,  H01L27/32 ,  H01L27/12

CPC classification number: H01L51/504 ,  H01L27/124 ,  H01L27/1248 ,  H01L27/3209 ,  H01L27/3246 ,  H01L27/3248 ,  H01L27/3258 ,  H01L27/3262 ,  H01L27/3276 ,  H01L51/5004 ,  H01L51/5056 ,  H01L51/5072 ,  H01L51/5278 ,  H01L2251/5384 ,  H01L2251/552

Abstract: An organic light emitting display device includes: a first light emitting unit including a first light emitting layer; and a second light emitting unit on the first light emitting unit including a second light emitting layer. The first light emitting layer includes at least one dopant and at least two hosts. The at least two hosts are different from each other in electron mobility and hole mobility.