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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 12514117 B1

PDFFull Text
Date of Patent:
Dec. 30, 2025

Filed:

Apr. 18, 2022

Light-emitting device and electronic apparatus comprising light-emitting device

Applicant:

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

Inventors:

Heungsu Park, Yongin-si, KR;

Namsu Kang, Yongin-si, KR;

Songeun Lee, Yongin-si, KR;

Jongwon Lee, Yongin-si, KR;

Hyunshik Lee, Yongin-si, KR;

Wonsuk Han, Yongin-si, KR;

Assignee:

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

Attorney:

CANTOR COLBURN LLP

Primary Examiner:

Gregory D Clark

Int. Cl.
CPC ...
H01L 51/50 (2006.01); H10K 85/30 (2023.01); H10K 85/60 (2023.01); H10K 50/11 (2023.01); H10K 50/16 (2023.01); H10K 50/19 (2023.01); H10K 101/00 (2023.01); H10K 101/10 (2023.01); H10K 101/30 (2023.01);
U.S. Cl.
CPC ...
H10K 85/6572 (2023.02); H10K 85/322 (2023.02); H10K 85/342 (2023.02); H10K 85/615 (2023.02); H10K 85/626 (2023.02); H10K 85/633 (2023.02); H10K 85/654 (2023.02); H10K 85/6574 (2023.02); H10K 85/6576 (2023.02); H10K 50/11 (2023.02); H10K 50/16 (2023.02); H10K 50/19 (2023.02); H10K 85/624 (2023.02); H10K 2101/10 (2023.02); H10K 2101/30 (2023.02); H10K 2101/90 (2023.02);
Abstract

A light emitting device in which: a) an absolute value of a lowest unoccupied molecular orbital (LUMO) energy level of a first electron transporting compound (ET-1) is smaller than an absolute value of a LUMO energy level of a host compound (H-1), b) an absolute value of a LUMO energy level of a second electron transporting compound (ET-2) is smaller than an absolute value of a LUMO energy level of a third electron transporting compound (ET-3), c) and an absolute value of a LUMO energy level of the second electron transporting compound (ET-2) is smaller than an absolute value of a LUMO energy level of the first electron transporting compound (ET-1).

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