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:
Aug. 22, 2006
Filed:
May. 11, 2005
Jun Kamatani, Kawasaki, JP;
Shinjiro Okada, Isehara, JP;
Akira Tsuboyama, Sagamihara, JP;
Takao Takiguchi, Tokyo, JP;
Seishi Miura, Sagamihara, JP;
Koji Noguchi, Sagamihara, JP;
Takashi Moriyama, Kawasaki, JP;
Manabu Furugori, Atsugi, JP;
Jun Kamatani, Kawasaki, JP;
Shinjiro Okada, Isehara, JP;
Akira Tsuboyama, Sagamihara, JP;
Takao Takiguchi, Tokyo, JP;
Seishi Miura, Sagamihara, JP;
Koji Noguchi, Sagamihara, JP;
Takashi Moriyama, Kawasaki, JP;
Manabu Furugori, Atsugi, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In a luminescence device formed of one or plural layers of organic film between a cathode and an anode, at least one layer is a luminescence layer, and a luminescence molecule of a metal coordination compound having a basic structure represented by formula (1) MLL'and having a substituent on at least one of cyclic groups incorporated as a guest in a host material at a concentration of at least 8 wt. %, which is higher than a concentration at which a luminescence molecule of a similar structure but having no substituent exhibits a maximum luminescence efficiency to form the luminescence layer. As a result, a high-efficiency luminescence device is provided, which is less likely to cause concentration extinction even when a luminescence molecule is contained at a high concentration relative to the host material in the luminescence layer.