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:
Oct. 14, 2014
Filed:
Aug. 30, 2011
Aoi Okada, Tokyo, JP;
Yumi Fukuda, Tokyo, JP;
Naotoshi Matsuda, Chigasaki, JP;
Iwao Mitsuishi, Tokyo, JP;
Shinya Nunoue, Ichikawa, JP;
Keiko Albessard, Yokohama, JP;
Masahiro Kato, Naka-Gun, JP;
Aoi Okada, Tokyo, JP;
Yumi Fukuda, Tokyo, JP;
Naotoshi Matsuda, Chigasaki, JP;
Iwao Mitsuishi, Tokyo, JP;
Shinya Nunoue, Ichikawa, JP;
Keiko Albessard, Yokohama, JP;
Masahiro Kato, Naka-Gun, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
The embodiment provides a red light-emitting fluorescent substance represented by the following formula (1):(MEC)MAlON  (1).In the formula (1), M is an element selected from the group consisting of IA group elements, IIA group elements, IIIA group elements, IIIB group elements, rare earth elements and IVA group elements; EC is an element selected from the group consisting of Eu, Ce, Mn, Tb, Yb, Dy, Sm, Tm, Pr, Nd, Pm, Ho, Er, Cr, Sn, Cu, Zn, As, Ag, Cd, Sb, Au, Hg, Tl, Pb, Bi and Fe; Mis different from M and is selected from the group consisting of tetravalent elements; and x, a, b, c and d are numbers satisfying the conditions of 0<x<0.2, 0.55<a<0.80, 2.10<b<3.90, 0<c≦0.25 and 4<d<5, respectively. This substance emits luminescence having a peak in the wavelength range of 620 to 670 nm when excited by light of 250 to 500 nm.