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:
Jun. 10, 2014
Filed:
Sep. 20, 2011
Naotsugu Ogura, Hamura, JP;
Hideki Nakamura, Hamura, JP;
Takeshi Miyazaki, Fussa, JP;
Osamu Umamine, Fussa, JP;
Hiroki Masuda, Fussa, JP;
Yasuyuki Kawakami, Abiko, JP;
Naotsugu Ogura, Hamura, JP;
Hideki Nakamura, Hamura, JP;
Takeshi Miyazaki, Fussa, JP;
Osamu Umamine, 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 includes an excitation light source and a luminescent wheel on which luminescent light emitting areas including, on a reflecting surface, red and green luminescent materials which respectively emit light of red and green wavelength band, when receiving excitation light, and a diffuse transmission area which diffuses and transmits excitation light, are aligned end to end in a circumferential direction. An excitation light incident surface of a luminescent material layer of the luminescent wheel has a surface with a plurality of projecting bodies. Regular quadrangular pyramids are arranged thereon in a matrix with outer boundaries of bottom portions of adjacent regular quadrangular pyramids contacting each other. The pyramids rise at a rising angle of at least 30°, and a length of one side of an outer boundary of the bottom portion of the pyramid is between 10 and 100 μm.