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:
Nov. 28, 2023
Filed:
Mar. 19, 2020
Kasumi Nakamura, Kanagawa, JP;
Yohei Takano, Kanagawa, JP;
Tatsuya Takahashi, Kanagawa, JP;
Makoto Hirakawa, Tokyo, JP;
Kasumi Nakamura, Kanagawa, JP;
Yohei Takano, Kanagawa, JP;
Tatsuya Takahashi, Kanagawa, JP;
Makoto Hirakawa, Tokyo, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A light-source device includes an excitation light source; an optical element having a reflecting surface to reflect first colored light emitted from the excitation light source; and a wavelength conversion unit including a waveform conversion member configured to convert at least a portion of the first colored light reflected by the optical element and incident on the wavelength conversion unit, into second colored light having a wavelength different from a wavelength of the first colored light and emit the second colored light. A point P does not intersect with a light flux Q where the point P is a center of the first colored light on the reflecting surface of the optical element and the light flux Q is a light flux of the first colored light emitted from the wavelength conversion unit.