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. 10, 2019
Filed:
Nov. 04, 2016
Sharp Kabushiki Kaisha, Sakai, Osaka, JP;
Yuto Tsukamoto, Sakai, JP;
Katsuhiro Kikuchi, Sakai, JP;
Shinichi Kawato, Sakai, JP;
Manabu Niboshi, Sakai, JP;
Eiji Koike, Sakai, JP;
Asae Ito, Sakai, JP;
SHARP KABUSHIKI KAISHA, Sakai, JP;
Abstract
An organic EL element () includes a first light-emitting layer () having the shortest emission peak wavelength of a light-emitting layer () and containing a host material and a TTF material or at least the TTF material, a second light-emitting layer () containing at least a TADF material, a third light-emitting layer () having the longest emission peak wavelength of the light-emitting layer () and containing at least fluorescent material. The excited triplet level of the TTF material is lower than the excited triplet level of the TADF material.