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:
May. 23, 2017
Filed:
Oct. 23, 2015
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Materials Co., Ltd., Yokohama-Shi, Kanagawa-Ken, JP;
Tsutomu Ishii, Yokohama, JP;
Yoshitaka Funayama, Yokohama, JP;
Yumi Ito, Yokohama, JP;
Yasumasa Ooya, Chigasaki, JP;
Ryo Sakai, Yokohama, JP;
Katsutoshi Nakagawa, Yokohama, JP;
Hajime Takeuchi, Yokohama, JP;
Yasuhiro Shirakawa, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Materials Co., Ltd., Kanagawa-ken, JP;
Abstract
An LED light emitting device is provided that has high color rendering properties and is excellent color uniformity and, at the same time, can realize even luminescence unattainable by conventional techniques. A phosphor having a composition represented by formula: (SrBaMgMnEu)SiOwherein x, y, z, and ω are respectively coefficients satisfying 0.1<x<1, 0<y<0.5, 0<z<0.1, y>z, and 0.01<ω<0.2 is provided. The phosphor is used in combination with ultraviolet and blue light emitting diodes having a luminescence peak wavelength of 360 to 470 nm to form an LED light emitting device.