公开(公告)号：US20230189554A1

公开(公告)日：2023-06-15

申请号：US17937539

申请日：2022-10-03

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： JEONGSEOK LEE ,  SEUNGYONG SONG ,  HYEKYUN LEE

IPC: H01L51/52 ,  H01L27/32

CPC classification number: H01L51/5256 ,  H01L27/3218 ,  H01L51/5275 ,  H01L27/3216

Abstract: A display device includes a light-emitting element layer and an encapsulation layer disposed on the light-emitting element layer. The encapsulation layer includes a first inorganic film having a first refractive index at a wavelength between about 380 nm and about 500 nm, the first refractive index being between about 1.5 and about 1.7, a second inorganic film disposed on the first inorganic film and having a second refractive index at a wavelength between about 380 nm and about 500 nm, the second refractive index being between about 1.5 and about 1.7, and an organic film disposed between the first inorganic film and the second inorganic film, and having a third refractive index at a wavelength between about 380 nm and about 500 nm, the third refractive index being between about 1.5 and about 1.7. Accordingly, the display device including the encapsulation layer with the high light transmittance may have the high light emission efficiency.

公开(公告)号：US20220320467A1

公开(公告)日：2022-10-06

申请号：US17591091

申请日：2022-02-02

Applicant: Samsung Display Co., Ltd.

Inventor： JIMYOUNG YE ,  SEULONG KIM ,  HAJIN SONG ,  JIHWAN YOON ,  HYEKYUN LEE ,  DONGSEOB JEONG ,  JAEHOON HWANG

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

Abstract: A light emitting device includes: a first electrode; a hole transport region disposed on the first electrode; a first emission layer disposed on the hole transport region, and which emits light of a first wavelength; a second emission layer disposed on the hole transport region, and which emits light of a second wavelength different from the first wavelength; an electron transport region disposed on the first emission layer and the second emission layer; a second electrode disposed on the electron transport region; and a capping layer disposed on the second electrode. In exit light emitted to an upper surface of the capping layer, the exit light has a maximum intensity at an azimuth angle of about 25° to about 35°.

公开(公告)号：US20220336766A1

公开(公告)日：2022-10-20

申请号：US17575583

申请日：2022-01-13

Applicant: Samsung Display Co., Ltd.

Inventor： JIMYOUNG YE ,  SEULONG KIM ,  HYEKYUN LEE ,  HAJIN SONG ,  JIHWAN YOON ,  DONGSEOB JEONG ,  JAEHOON HWANG

IPC: H01L51/50

Abstract: A light emitting devices includes a first electrode, a hole transport region on the first electrode, a first emission layer on the hole transport region, the first emission layer to emit light of a first wavelength, a second emission layer on the hole transport region and to emit light of a second wavelength, an electron transport region on the first and second emission layers, and a second electrode on the electron transport region. The first emission layer includes a first sub-emission layer including a first hole transport host and a first sub-dopant to emit the light of the first wavelength, and a second sub-emission layer including a first electron transport and a second sub-dopant to emit the light of the first wavelength. The second emission layer includes a second hole transport host, a second electron transport host, and a second dopant to emit the light of the second wavelength.

公开(公告)号：US20230232655A1

公开(公告)日：2023-07-20

申请号：US18061019

申请日：2022-12-02

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： JEONGSEOK LEE ,  HYEKYUN LEE ,  SEUNGHUN KIM ,  WOOCHEOL PARK ,  KWANHYUCK YOON

IPC: H01L51/00

CPC classification number: H01L51/5265 ,  H01L51/5253 ,  H01L51/56

Abstract: A display device includes a display element layer including a first electrode layer, a light-emitting layer disposed on the first electrode layer, and a second electrode layer disposed on the light-emitting layer, a capping layer disposed on the second electrode layer, a protective layer disposed on the capping layer and covering a portion of the second electrode layer exposed by the capping layer, an optical compensation layer disposed on the protective layer, and an encapsulation layer disposed on the optical compensation layer. The refractive index of the optical compensation layer is lower than that of the protective layer.