公开(公告)号：US20230217815A1

公开(公告)日：2023-07-06

申请号：US18079709

申请日：2022-12-12

Applicant: LG Display Co., Ltd.

Inventor： Wook SONG ,  Min Hyeong HWANG ,  Myeong Seon CHO ,  Chun Ki KIM ,  Sae Mi PARK ,  Young Jun YU ,  Jung Keun KIM ,  Byung Soo KIM ,  Sang Beom KIM

IPC: H10K85/60 ,  H10K59/35

CPC classification number: H01L51/0067 ,  H01L27/3211 ,  H01L51/0072 ,  H01L51/006 ,  H01L51/0061 ,  H01L51/5072

Abstract: A light emitting device and a light emitting display including the same. The light emitting device includes an anode and a cathode facing each other, a first stack and a second stack disposed between the anode and the cathode, the first stack including a first electron transport layer comprising a first material represented by Formula 1, a first blue light emitting layer containing a boron-based compound emitting light having a wavelength of 430 nm to 480 nm, and a first electron-blocking layer including a second material including a spirofluorene group, and at least one hydrogen atom on at least one side of the spirofluorene group is substituted by deuterium, and the second stack including at least two phosphorescent light emitting layers emitting light having a longer wavelength than that of the light emitted by the first blue light emitting layer, and a charge generation layer.

公开(公告)号：US20220209158A1

公开(公告)日：2022-06-30

申请号：US17560586

申请日：2021-12-23

Applicant: LG DISPLAY CO., LTD.

Inventor： Mi Young HAN ,  Min Hyeong HWANG ,  Jung Keun KIM

IPC: H01L51/50 ,  H01L27/32

Abstract: A white light emitting device and a display device using the same which can prevent a change in luminance due to change in viewing angle, improve color deviation, and lower a driving voltage at the same time, through a change in an internal stack structure and a thickness an emission-side electrode with regard to a vertical distance from a lower surface of the first electrode to a lower surface of the second electrode.