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:
Jul. 09, 2002
Filed:
Jul. 11, 2000
Shizuo Tokito, Aichi, JP;
Koji Noda, Aichi, JP;
Hisayoshi Fujikawa, Aichi, JP;
Masahiko Ishii, Aichi, JP;
Yasunori Taga, Aichi, JP;
Makoto Kimura, Aichi, JP;
Yasuhiko Sawaki, Aichi, JP;
Kabushiki Kaisha Toyota Chuo Kenkyusho, Aichi-gun, JP;
Abstract
An organic EL element has an anode, a cathode, and one or more organic compound layers sandwiched between the anode and cathode, wherein at least one layer of said organic compound layers includes an organic compound denoted by chemical formula (1), which is more specifically denoted by chemical formulas (2)-(5). By introducing desired substituents at R -R , these compounds can be made to demonstrate hole transport function, emissive function, electron transport function, or a combination of those functions. Due to its tendency to be structurally non-planar, the organic compound does not crystallize easily, and has a high glass transition temperature. Use of such a compound in an organic EL element enhances element life.