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. 29, 2006
Filed:
Jul. 14, 2003
Tetsushi Inoue, Chiba, JP;
Junji Aotani, Chiba, JP;
Tetsuji Fujita, Chiba, JP;
Hiroyuki Endo, Chiba, JP;
Tetsushi Inoue, Chiba, JP;
Junji Aotani, Chiba, JP;
Tetsuji Fujita, Chiba, JP;
Hiroyuki Endo, Chiba, JP;
TDK Corporation, Tokyo, JP;
Abstract
An organic EL device comprising organic compound layers, at least one of which has a skeleton represented by formula (I): where Lis any one of o-, p-, and m-phenylene groups which have two, three or four rings and which may have a substituent with the proviso that when Lis a phenylene group having four rings, the phenylene group may have an unsubstituted or substituted aminophenyl group somewhere therein, R, R, Rand Rare each any one of the following groups: where R, R, R, R, R, Rand Rare each a substituted or unsubstituted aryl group, and r, r, rand rare each an integer of 0 to 5 with the proviso that r+r+r+r1, is less susceptible to physical changes, photochemical changes and electrochemical changes, and can emit light having various colors with high reliability and high light emission efficiency.