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:
Jul. 26, 2016
Filed:
Aug. 30, 2013
Tatsuya Takahashi, Shinagawa-ku, JP;
Kazuhiro Fujita, Machida, JP;
Toshiharu Murai, Kawasaki, JP;
Ikuo Maeda, Sagamihara, JP;
Takehiro Nishimori, Yokohama, JP;
Tatsuya Takahashi, Shinagawa-ku, JP;
Kazuhiro Fujita, Machida, JP;
Toshiharu Murai, Kawasaki, JP;
Ikuo Maeda, Sagamihara, JP;
Takehiro Nishimori, Yokohama, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
An illumination light source device includes a reflection-transmission wheel provided on a light-path from an excitation light source and having a transmission region that transmits an excitation light and a reflection region reflecting the excitation light, a fluorescent wheel provided on at least one of the reflection light-path and the transmission light-path and having a fluorescent body emitting fluorescence when excited by the excitation light, and a control section turning-on the excitation light source while the boundary of the transmission region and the reflection region traverses the light-path, in order to provide an illumination light source device capable of preventing a deterioration of the fluorescent body, whereby improving a color reproducibility by use of the color mixture occurred at the boundary region between the transmission light-path and the reflection light-path effectively and improving the brightness of image.