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:
Jan. 26, 2016
Filed:
Sep. 22, 2014
Kabushiki Kaisha Toshiba, Tokyo, JP;
Hideto Furuyama, Yokohama Kanagawa, JP;
Yosuke Akimoto, Yokohama Kanagawa, JP;
Miyoko Shimada, Yokohama Kanagawa, JP;
Akihiro Kojima, Yokohama Kanagawa, JP;
Yoshiaki Sugizaki, Fujisawa Kanagawa, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
According to one embodiment, a semiconductor light emitting device includes a light emitting element, a phosphor layer, and a fluorescent reflection film. The phosphor layer has a transparent medium, a phosphor dispersed in the transparent medium, and a particle dispersed in the transparent medium. The phosphor is excited by the excitation light so as to emit a fluorescence. The particle is a magnitude of not more than 1/10 a wavelength of the excitation light. The particle has a different refractive index from a refractive index of the transparent medium. The fluorescent reflection film is provided between the light emitting element and the phosphor layer. The fluorescent reflection film has a higher reflectance with respect to a fluorescent wavelength of the phosphor, than a reflectance with respect to the wavelength of the excitation lights.