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:
Dec. 01, 2020
Filed:
Apr. 25, 2014
Canon Kabushiki Kaisha, Tokyo, JP;
Kenichi Ikari, Abiko, JP;
Hiroki Ohrui, Kawasaki, JP;
Yojiro Matsuda, Kawasaki, JP;
Haruna Iida, Nagoya, JP;
Masumi Itabashi, Kodaira, JP;
Kei Tagami, Yokohama, JP;
Tetsuo Takahashi, Kawasaki, JP;
Satoru Shiobara, Funabashi, JP;
Tomona Yamaguchi, Tokyo, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
Provided is an organic light emitting device having high emission efficiency and a long continuous driving lifetime. The organic light emitting device includes: an anode; a cathode; and an emitting layer placed between the anode and the cathode, in which: the emitting layer contains an emitting material that emits fluorescence; and in an emission wavelength region of the emitting material, an absorption peak of an absorption spectrum in a minimum excited triplet state of a material having a smallest minimum excited triplet energy out of constituent materials in the emitting layer is absent.