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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 12369490 B1

PDFFull Text
Date of Patent:
Jul. 22, 2025

Filed:

Oct. 26, 2021

Organic electroluminescent element, organic electroluminescent display device, and electronic device

Applicant:

Idemitsu Kosan Co., Ltd., Tokyo, JP;

Inventors:

Masato Nakamura, Sodegaura, JP;

Yusuke Takahashi, Sodegaura, JP;

Keitaro Yamada, Sodegaura, JP;

Tasuku Haketa, Sodegaura, JP;

Emiko Kambe, Sodegaura, JP;

Kazuki Nishimura, Sodegaura, JP;

Assignee:

IDEMITSU KOSAN CO., LTD., Tokyo, JP;

Attorney:

Foley & Lardner LLP

Primary Examiner:

Elizabeth M Dahlburg

Int. Cl.
CPC ...
H10K 85/60 (2023.01); H10K 50/15 (2023.01); H10K 85/40 (2023.01); H10K 101/40 (2023.01); H10K 50/11 (2023.01); H10K 50/12 (2023.01); H10K 50/13 (2023.01); H10K 59/80 (2023.01); H10K 101/10 (2023.01); H10K 101/30 (2023.01);
U.S. Cl.
CPC ...
H10K 85/636 (2023.02); H10K 85/40 (2023.02); H10K 85/623 (2023.02); H10K 85/624 (2023.02); H10K 85/626 (2023.02); H10K 85/633 (2023.02); H10K 85/655 (2023.02); H10K 85/6572 (2023.02); H10K 85/6574 (2023.02); H10K 85/6576 (2023.02); H10K 50/11 (2023.02); H10K 50/12 (2023.02); H10K 50/13 (2023.02); H10K 50/156 (2023.02); H10K 59/879 (2023.02); H10K 2101/10 (2023.02); H10K 2101/30 (2023.02); H10K 2101/40 (2023.02);
Abstract

An organic electroluminescence device includes an emitting region provided between a cathode and an anode, a first anode side organic layer, a second anode side organic layer, and a third anode side organic layer, in which the emitting region includes at least one emitting layer, the second anode side organic layer contains at least one compound different from the compound contained in the third anode side organic layer, the third anode side organic layer has a film thickness of 20 nm or more, and a difference NM−NMbetween a refractive index NMof a constituent material contained in the second anode side organic layer and a refractive index NMof a constituent material contained in the third anode side organic layer satisfies a relationship of a numerical formula (Numerical Formula N1) below,NM−NM≥0.05  (Numerical Formula N1).

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