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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 12171127 B1

PDFFull Text
Date of Patent:
Dec. 17, 2024

Filed:

Nov. 15, 2023

Light-emitting element, display module, lighting module, light-emitting device, display device, electronic appliance, and lighting device

Applicant:

Semiconductor Energy Laboratory Co., Ltd., Atsugi, JP;

Inventors:

Takahiro Ishisone, Kanagawa, JP;

Satoshi Seo, Kanagawa, JP;

Yusuke Nonaka, Kanagawa, JP;

Nobuharu Ohsawa, Kanagawa, JP;

Assignee:

Semiconductor Energy Laboratory Co., Ltd., Atsugi, JP;

Attorney:

Fish & Richardson P.C.

Primary Examiner:

Moazzam Hossain

Int. Cl.
CPC ...
H10K 50/11 (2023.01); H10K 50/12 (2023.01); H10K 50/13 (2023.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01); H10K 50/17 (2023.01); H10K 50/18 (2023.01); H10K 50/81 (2023.01); H10K 50/828 (2023.01); H10K 50/85 (2023.01); H10K 50/86 (2023.01); H10K 59/12 (2023.01); H10K 59/35 (2023.01); H10K 50/84 (2023.01); H10K 85/30 (2023.01); H10K 85/60 (2023.01); H10K 101/10 (2023.01); H10K 101/30 (2023.01);
U.S. Cl.
CPC ...
H10K 59/35 (2023.02); H10K 50/11 (2023.02); H10K 50/12 (2023.02); H10K 50/13 (2023.02); H10K 50/15 (2023.02); H10K 50/16 (2023.02); H10K 50/17 (2023.02); H10K 50/171 (2023.02); H10K 50/18 (2023.02); H10K 50/81 (2023.02); H10K 50/828 (2023.02); H10K 50/85 (2023.02); H10K 50/865 (2023.02); H10K 59/12 (2023.02); H10K 50/841 (2023.02); H10K 85/342 (2023.02); H10K 85/615 (2023.02); H10K 85/622 (2023.02); H10K 85/626 (2023.02); H10K 85/633 (2023.02); H10K 85/636 (2023.02); H10K 85/6572 (2023.02); H10K 85/6576 (2023.02); H10K 2101/10 (2023.02); H10K 2101/30 (2023.02);
Abstract

A multicolor light-emitting element that utilizes fluorescence and phosphorescence and is advantageous for practical application is provided. The light-emitting element has a stacked-layer structure of a first light-emitting layer containing a host material and a fluorescent substance and a second light-emitting layer containing two kinds of organic compounds and a substance that can convert triplet excitation energy into luminescence. Note that light emitted from the first light-emitting layer has an emission peak on the shorter wavelength side than light emitted from the second light-emitting layer.

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