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. 25, 2012
Filed:
Aug. 31, 2010
Naotsugu Ogura, Hamura, JP;
Masahiro Ogawa, Ome, JP;
Hideki Nakamura, Hamura, JP;
Takeshi Miyazaki, Fussa, JP;
Hiroki Masuda, Fussa, JP;
Yasuyuki Kawakami, Abiko, JP;
Naotsugu Ogura, Hamura, JP;
Masahiro Ogawa, Ome, JP;
Hideki Nakamura, Hamura, JP;
Takeshi Miyazaki, Fussa, JP;
Hiroki Masuda, Fussa, JP;
Yasuyuki Kawakami, Abiko, JP;
Casio Computer Co., Ltd., Tokyo, JP;
Stanley Electric Co., Ltd., Tokyo, JP;
Abstract
A light source unit including an excitation light source for emitting light in a blue wavelength band, a fluorescent wheel, a light emitting device for emitting light in a red wavelength band and a light guiding optical system for guiding light emitted from the fluorescent wheel and the light emitting device to a light guiding device. The fluorescent wheel has a fluorescent area where a green fluorescent material layer for emitting fluorescent light in a green wavelength band is disposed and a diffuse area for converting light emitted from the excitation light source into diffuse light of which directivity is weak are disposed end to end in a circumferential direction. A concentration of weight content of the green fluorescent material and a thickness thereof are such that a luminescent intensity of fluorescent light emitted from the green fluorescent material layer is enhanced.