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:
Mar. 20, 2007
Filed:
Jan. 24, 2005
Masaru Kinoshita, Kawasaki, JP;
Yuichiro Itai, Kawasaki, JP;
Masaya Nakayama, Kawasaki, JP;
Jun Kodama, Kawasaki, JP;
Masaru Kinoshita, Kawasaki, JP;
Yuichiro Itai, Kawasaki, JP;
Masaya Nakayama, Kawasaki, JP;
Jun Kodama, Kawasaki, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
The present invention is an organic EL device in which an anode, a hole injection layer, a first carrier transportation layer, a first luminescent layer, a second carrier transportation layer, a second luminescent layer, an electron transportation layer, and a cathode are formed on a glass substrate in order, wherein layers with a smaller electron affinity Ea and a larger energy gap Eg than those of the first and second luminescent layers are employed for the first and second carrier transportation layers, so as to enhance the emission efficiency of the first and second luminescent layers.