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. 26, 2005
Filed:
Jun. 18, 2002
Applicants:
Akira Kohama, Otsu, JP;
Tsuyoshi Tominaga, Otsu, JP;
Daisuke Kitazawa, Otsu, JP;
Yoshio Himeshima, Kawasaki, JP;
Inventors:
Akira Kohama, Otsu, JP;
Tsuyoshi Tominaga, Otsu, JP;
Daisuke Kitazawa, Otsu, JP;
Yoshio Himeshima, Kawasaki, JP;
Assignee:
Toray Industries, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B033/14 ;
U.S. Cl.
CPC ...
Abstract
The present invention relates to an electroluminescent element formed by placing a luminescing substance between an anode and a cathode, such that when electrical energy is applied to the element, light is emitted having a peak wavelength of at least 580 nm. The luminescing substance comprises a fluorescent compound have a fluorescent maximum at about 540 nm or above and a compound having a pyrromethene structure (I) or metal complexes thereof.