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:
Apr. 21, 2015
Filed:
Dec. 15, 2006
Taishi Tsuji, Tsurugashima, JP;
Shin Kawami, Tsurugashima, JP;
Hideki Sato, Yokohama, JP;
Masayoshi Yabe, Yokohama, JP;
Taishi Tsuji, Tsurugashima, JP;
Shin Kawami, Tsurugashima, JP;
Hideki Sato, Yokohama, JP;
Masayoshi Yabe, Yokohama, JP;
Pioneer Corporation, Tokyo, JP;
Mitsubishi Chemical Corporation, Tokyo, JP;
Abstract
Disclosed is an organic electroluminescence device having a longer drive life. The organic electroluminescence device includes a light emitting layer which contains a luminescent dye and a host material having a nitrogen-containing aromatic heterocyclic ring. The luminescence resulting from the hole transport layer adjacent to the light emitting layer is less than one-hundredth of the luminescence resulting from the luminescent dye.