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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 12772685 B1

PDFFull Text
Date of Patent:
Oct. 20, 2026

Filed:

Apr. 26, 2022

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

Applicant:

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

Inventors:

Tetsuya Masuda, Tokyo, JP;

Satomi Tasaki, Tokyo, JP;

Hiroaki Toyoshima, Tokyo, JP;

Masato Nakamura, Tokyo, JP;

Kazuki Nishimura, Tokyo, JP;

Hiroaki Itoi, Tokyo, JP;

Tasuku Haketa, Tokyo, JP;

Emiko Kambe, Tokyo, JP;

Assignee:

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

Attorney:

Foley & Lardner LLP

Primary Examiner:

Elias Ullah

Int. Cl.
CPC ...
H10K 59/30 (2023.01); H10K 50/125 (2023.01); H10K 50/15 (2023.01); H10K 59/35 (2023.01); H10K 101/00 (2023.01); H10K 101/40 (2023.01);
U.S. Cl.
CPC ...
H10K 59/30 (2023.02); H10K 50/125 (2023.02); H10K 50/156 (2023.02); H10K 59/35 (2023.02); H10K 2101/40 (2023.02); H10K 2101/90 (2023.02);
Abstract

An organic EL device includes: an emitting region including a first emitting layer containing a first host material and a first luminescent compound and a second emitting layer containing a second host material and a second luminescent compound; and a hole transporting zone including one or more organic layers, in which at least one organic layer is a first organic layer in direct contact with the emitting region, the first organic layer contains a hole transporting zone material, the hole transporting zone is in direct contact with an anode and the emitting region, triplet energy of the first host material T(H1) and the second host material T(H2) satisfy Numerical Formula 1, and ionization potential of the hole transporting zone material Ip(HT) and the first luminescent compound Ip(D1) satisfy Numerical Formula 1X,

Find Patent Forward Citations

Masuda, Tetsuya. (2026). Organic electroluminescent element, organic electroluminescent display apparatus, and electronic device (U.S. Patent No. 12772685). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12772685

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