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:
Sep. 15, 2015
Filed:
Aug. 31, 2012
Applicants:
Yumi Fukuda, Tokyo, JP;
Iwao Mitsuishi, Machida, JP;
Keiko Albessard, Yokohama, JP;
Inventors:
Assignee:
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C09K 11/77 (2006.01); H01J 1/62 (2006.01); H01J 63/04 (2006.01); C09K 11/08 (2006.01); H05B 33/14 (2006.01);
U.S. Cl.
CPC ...
C09K 11/7718 (2013.01); C09K 11/0883 (2013.01); C09K 11/7716 (2013.01); C09K 11/7721 (2013.01); H05B 33/14 (2013.01);
Abstract
According to one embodiment, the luminescent material exhibits a luminescence peak in a wavelength ranging from 500 to 600 nm when excited with light having an emission peak in a wavelength ranging from 250 to 500 nm. The luminescent material has a composition represented by Formula 1 below:(MCe)AlSiON  Formula 1wherein M represents Sr and a part of Sr may be substituted by at least one selected from Ba, Ca, and Mg; x, y, z, u, and w satisfy following conditions: