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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12577195 B1

PDFFull Text
Date of Patent:
Mar. 17, 2026

Filed:

Jun. 08, 2022

Light emitting element and display device including the same

Applicant:

Samsung Display Co., Ltd., Yongin-si, KR;

Inventors:

Hyomin Ko, Suwon-si, KR;

Ilsoo Oh, Seoul, KR;

Bora Lee, Hwaseong-si, KR;

Illhun Cho, Seoul, KR;

Minji Kim, Hwaseong-si, KR;

Assignee:

SAMSUNG DISPLAY CO., LTD., Gyeonggi-Do, KR;

Attorney:

CANTOR COLBURN LLP

Primary Examiner:

Vu A Nguyen

Int. Cl.
CPC ...
C07C 211/54 (2006.01); C07D 209/82 (2006.01); C07D 307/91 (2006.01); C07D 333/76 (2006.01); C07D 405/12 (2006.01); C07D 409/12 (2006.01); C07F 5/02 (2006.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01); H10K 50/818 (2023.01); H10K 85/30 (2023.01); H10K 85/60 (2023.01);
U.S. Cl.
CPC ...
C07C 211/54 (2013.01); C07D 209/82 (2013.01); C07D 307/91 (2013.01); C07D 333/76 (2013.01); C07D 405/12 (2013.01); C07D 409/12 (2013.01); C07F 5/027 (2013.01); H10K 85/322 (2023.02); H10K 85/615 (2023.02); H10K 85/622 (2023.02); H10K 85/624 (2023.02); H10K 85/631 (2023.02); H10K 85/633 (2023.02); H10K 85/6572 (2023.02); H10K 85/6574 (2023.02); H10K 85/6576 (2023.02); H10K 50/156 (2023.02); H10K 50/16 (2023.02); H10K 50/818 (2023.02);
Abstract

A light emitting element includes a first electrode, a hole transport region disposed on the first electrode, an emission layer disposed on the hole transport region, an electron transport region disposed on the emission layer, and a second electrode disposed on the electron transport region, wherein the hole transport region includes a first hole transport layer disposed adjacent to the first electrode and including a first amine compound having a first refractive index, a second hole transport layer disposed between the first hole transport layer and the emission layer, and including a second amine compound having a second refractive index greater than the first refractive index, and a third hole transport layer disposed between the second hole transport layer and the emission layer, and including a third amine compound having a third refractive index less than the second refractive index, thereby having high luminous efficiency.

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