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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 11917882 B1

PDFFull Text
Date of Patent:
Feb. 27, 2024

Filed:

Nov. 25, 2020

Light-emitting device, electronic device, and lighting device

Applicant:

Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken, JP;

Inventors:

Satoshi Seo, Kanagawa, JP;

Toshiki Sasaki, Kanagawa, JP;

Tsunenori Suzuki, Kanagawa, JP;

Sachiko Kawakami, Kanagawa, JP;

Naoaki Hashimoto, Kanagawa, JP;

Assignee:

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

Attorney:

Husch Blackwell LLP

Primary Examiner:

Dawn L Garrett

Int. Cl.
CPC ...
C07D 307/77 (2006.01); C09K 11/06 (2006.01); H01L 51/50 (2006.01); H10K 59/35 (2023.01); H10K 50/11 (2023.01); H10K 50/19 (2023.01); H10K 59/32 (2023.01); H10K 85/60 (2023.01); H10K 50/13 (2023.01); H10K 59/40 (2023.01); H10K 101/10 (2023.01); H10K 101/00 (2023.01);
U.S. Cl.
CPC ...
H10K 59/351 (2023.02); C07D 307/77 (2013.01); C09K 11/06 (2013.01); H10K 50/11 (2023.02); H10K 50/19 (2023.02); H10K 59/32 (2023.02); H10K 85/622 (2023.02); H10K 85/633 (2023.02); H10K 85/636 (2023.02); H10K 85/6574 (2023.02); C09K 2211/1007 (2013.01); C09K 2211/1011 (2013.01); C09K 2211/1014 (2013.01); C09K 2211/1088 (2013.01); H10K 50/131 (2023.02); H10K 59/40 (2023.02); H10K 85/626 (2023.02); H10K 2101/10 (2023.02); H10K 2101/27 (2023.02);
Abstract

A light-emitting device, an electronic device, or a lighting device with low power consumption and high reliability is provided. The light-emitting device includes a first light-emitting element, a second light-emitting element, a third light-emitting element, and a fourth light-emitting element. The first to fourth light-emitting elements include the same EL layer between an anode and a cathode. The EL layer includes a first light-emitting layer and a second light-emitting layer. The first light-emitting layer contains a fluorescent substance. The peak wavelength of an emission spectrum of the fluorescent substance in a toluene solution of the fluorescent substance is 440 nm to 460 nm, preferably 440 nm to 455 nm. The second light-emitting layer contains a phosphorescent substance. The first light-emitting element exhibits blue emission. The second light-emitting element exhibits green emission. The third light-emitting element exhibits red emission. The fourth light-emitting element exhibits yellow emission.

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