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. 09, 2007
Filed:
Oct. 14, 2005
Yasuhiko Shirota, Toyonaka-shi, Osaka 561-0827, JP;
Yutaka Ohsedo, Sapporo, JP;
Kazuyuki Moriwaki, Minoo, JP;
Kenji Okumoto, Toyonaka, JP;
Yasuhiko Shirota, Toyonaka-shi, Osaka 561-0827, JP;
Yutaka Ohsedo, Sapporo, JP;
Kazuyuki Moriwaki, Minoo, JP;
Kenji Okumoto, Toyonaka, JP;
Other;
Daicel Chemical Industries, Ltd., Sakai, JP;
Abstract
An organic electroluminescent device having an organic layer between a pair of electrodes. The organic layer (in particular, a hole-transporting layer) has a polymer of a vinyl compound represented by the following formula (1): wherein Rand Rare the same or different, each representing a hydrogen atom, a halogen atom, an alkyl group or an alkoxy group. The glass transition temperature of the polymer is about 200 to 250° C., and the polymer has high heat-resistance. Thus, the use of the polymer improves heat resistance of an organic EL device.