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:
Jan. 15, 2013
Filed:
May. 14, 2009
Keiji Okinaka, Kawasaki, JP;
Masataka Yashima, Tokyo, JP;
Maki Okajima, Kawasaki, JP;
Hajime Muta, Zama, JP;
Keiji Okinaka, Kawasaki, JP;
Masataka Yashima, Tokyo, JP;
Maki Okajima, Kawasaki, JP;
Hajime Muta, Zama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An organic light emitting device having long continuous driving lifetime is provided. The organic light emitting device includes an anode, a cathode, and an emission layer formed of an organic compound arranged between the anode and the cathode, in which the emission layer includes a light emitting material and a material having a smallest ionization potential, and an absorption spectrum in a radical cation state of the material having the smallest ionization potential in the emission layer does not have its absorption peak in an emission wavelength region of the light emitting material.