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:
Jun. 16, 2026
Filed:
Dec. 21, 2021
Magnolia Blue Corporation, Tokyo, JP;
Yasuhiro Sekimoto, Tokyo, JP;
Shinichiro Ishino, Tokyo, JP;
Toshiyuki Akiyama, Tokyo, JP;
Tomohiko Oda, Tokyo, JP;
Muneharu Sato, Tokyo, JP;
MAGNOLIA BLUE CORPORATION, Tokyo, JP;
Abstract
An organic EL element including an anode, a cathode, and a light emitting layer between the anode and the cathode. The light emitting layer includes a fluorescent material and a host material. A difference between a lowest unoccupied molecular orbital (LUMO) level of the fluorescent material and a highest occupied molecular orbital (HOMO) level of the fluorescent material is less than or equal to a difference between a LUMO level and a HOMO level of the host material. The LUMO level of the fluorescent material is equal to or higher than the LUMO level of the host material. The HOMO level of the fluorescent material is equal to or higher than the HOMO level of the host material, and a difference in energy level between the HOMO level of the fluorescent material and the HOMO level of the host material is 0.3 eV or less.