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.:
Date of Patent:
Sep. 01, 2026
Filed:
May. 18, 2020
Applicant:
Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken, JP;
Inventors:
Takeyoshi Watabe, Atsugi, JP;
Airi Ueda, Sagamihara, JP;
Nobuharu Ohsawa, Zama, JP;
Satoshi Seo, Sagamihara, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H10K 50/11 (2023.01); H10K 59/12 (2023.01); H10K 59/122 (2023.01); H10K 85/30 (2023.01); H10K 85/60 (2023.01); H10K 101/00 (2023.01); H10K 101/10 (2023.01); H10K 101/20 (2023.01); H10K 101/30 (2023.01);
U.S. Cl.
CPC ...
H10K 50/11 (2023.02); H10K 59/12 (2023.02); H10K 59/122 (2023.02); H10K 85/342 (2023.02); H10K 85/615 (2023.02); H10K 85/626 (2023.02); H10K 85/631 (2023.02); H10K 85/657 (2023.02); H10K 85/6572 (2023.02); H10K 85/6576 (2023.02); H10K 2101/10 (2023.02); H10K 2101/20 (2023.02); H10K 2101/30 (2023.02); H10K 2101/90 (2023.02);
Abstract
A light-emitting device that emits near-infrared light and emits visible light that is less likely to be seen is provided. The light-emitting device contains a light-emitting organic compound and a host material in a light-emitting layer. The maximum peak wavelength in an emission spectrum of the light-emitting device is greater than or equal to 750 nm and less than or equal to 900 nm. A luminance A and a radiance B of the light-emitting device satisfy 0≤A/B≤1.