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:
Dec. 06, 2016
Filed:
Mar. 15, 2013
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Materials Co., Ltd., Yokohama-Shi, JP;
Daichi Usui, Yokohama, JP;
Yasuhiro Shirakawa, Yokohama, JP;
Hirofumi Takemura, Kamakura, JP;
Tsutomu Ishii, Yokohama, JP;
Kabushiki Kaisha Toshiba, Minato-Ku, JP;
Toshiba Materials Co., Ltd., Yokohama-Shi, JP;
Abstract
The present invention provides a phosphor comprising a europium-activated sialon crystal having a basic composition represented by a formula: (Sr, Eu)SiAlON(1) (wherein x is 0<x<1, α is 0<α≦4 and β, γ, δ and ω are numbers such that converted numerical values when α is 3 satisfy 9<β≦15, 1≦γ≦5, 0.5≦δ≦3 and 10≦ω≦30), wherein the phosphor is composed of particles having a sphericity of 0.65 or more and emits green light by being excited by ultraviolet light, violet light or blue light.