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:
May. 04, 2004
Filed:
Jun. 13, 2002
Makoto Mouri, Aichi, JP;
Hisato Takeuchi, Aichi, JP;
Hiromitsu Tanaka, Aichi, JP;
Tomohiko Mori, Aichi, JP;
Masahiko Ishii, Aichi, JP;
Koji Noda, Aichi, JP;
Shizuo Tokito, Kawasaki, JP;
Kabushiki Kaisha Toyota Chuo Kenkyusho, Aichi-gun, JP;
Abstract
Quinoline derivatives represented by formula (1) wherein two or more of substituents R to R are each a group of formula (2). In general formula (2), Q is a carbo- or hetero-aryl group; and the number (n) of double bonds is preferably 1 to 3. Use of such derivatives in an organic EL device provided with a layer of an organic compound and two electrodes sandwiching the layer as the organic compound gives devices emitting yellow to red light with high brightness and high efficiency. Further, doping a hole transport layer with such derivatives realizes organic EL devices capable of emitting lights of resultant colors (e.g., white) composed of lights from light-emitting and hole transport layers.