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:
Mar. 20, 2001
Filed:
May. 16, 1996
Kenji Nakaya, Chiba, JP;
Tetsushi Inoue, Chiba, JP;
TDK Corporation, Tokyo, JP;
Abstract
An organic EL element of the invention has an organic compound layer, especially a light emitting layer which contains a compound of the following general formula (I): (Ar),-L wherein Ar is an aromatic-bearing group, m is an integer of 2 to 6, the Ar groups may be the same or different, and L is a m-valent residue of a condensed polycyclic aromatic compound having 3 to 10 rings. Where L is a di- or trivalent residue derived from anthracene, at least one Ar is an aromatic residue derived from an alkynylarene. Where L is a tetravalent residue derived from naphthacene and Ar groups are attached at the 5-, 6-, 11- and 12-positions thereof, all the four Ar groups are not phenyl groups at the same time. The device of the invention sustains light emission of satisfactory luminance, especially at long wavelength for a long time.