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. 03, 2009
Filed:
Jan. 23, 2007
Ryosuke Hiramatsu, Kawasaki, JP;
Masaaki Tamatani, Fujisawa, JP;
Hironori Asai, Yokohama, JP;
Kazuaki Ootsuka, Yokosuka, JP;
Ryosuke Hiramatsu, Kawasaki, JP;
Masaaki Tamatani, Fujisawa, JP;
Hironori Asai, Yokohama, JP;
Kazuaki Ootsuka, Yokosuka, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A luminescent material is provided, which includes a material formed of a single composition containing the main crystal phase and an activator which causes light emission. The material exhibits a narrowband light emission spectrum in a wavelength ranging from 540 nm to 550 nm and a broadband light emission spectrum in a wavelength ranging from 500 nm to 600 nm when the material is excited with light having the main light emission peak having a wavelength ranging from 370 nm to 460 nm.