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. 20, 2012
Filed:
May. 31, 2007
Masamichi Harada, Kitakatsuragi-gun, JP;
Masamichi Harada, Kitakatsuragi-gun, JP;
Sharp Kabushiki Kaisha, Osaka-shi, JP;
Abstract
There are provided a wavelength conversion member including phosphors made of phosphor particles which are made of an oxynitride and/or a nitride and have a refractive index n, and a coating which coats each of the phosphor particles and has a refractive index n, and a medium having the phosphors dispersed therein and having a refractive index n, the refractive index nof the coating being a value between nand n, and a light-emitting device having the wavelength conversion member incorporated therein. It is preferable in the present invention that the coating is formed of a plurality of layers, and has its refractive index varying in a stepwise manner in a direction from a surface of each of the phosphor particles to an interface with the medium.