公开(公告)号：US20180190941A1

公开(公告)日：2018-07-05

申请号：US15847725

申请日：2017-12-19

Applicant: LG Display Co., Ltd.

Inventor： Hak-Min LEE ,  Hee-Jin KIM ,  Sung-Soo PARK

IPC: H01L51/52 ,  H01L51/50

CPC classification number: H01L51/5275 ,  H01L27/3244 ,  H01L51/5004 ,  H01L51/5268 ,  H01L2251/5369 ,  H01L2251/558

Abstract: An electroluminescent display device includes a substrate; a first electrode on the substrate; a hole auxiliary layer on the first electrode; a light emitting material layer on the hole auxiliary layer; an electron auxiliary layer on the light emitting material layer; a second electrode on the electron auxiliary layer; and insulation layers between the hole auxiliary layer and the light emitting material layer and between the electron auxiliary layer and the light emitting material layer, wherein a refractive index of the insulation layers is smaller than a refractive index of the light emitting material layer.