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. 16, 2024
Filed:
Mar. 11, 2022
Kasumi Nakamura, Kanagawa, JP;
Yohei Takano, Kanagawa, JP;
Kazuhiro Fujita, Tokyo, JP;
Takashi Sasaki, Kanagawa, JP;
Shigeaki Imai, Kanagawa, JP;
Makoto Hirakawa, Tokyo, JP;
Kasumi Nakamura, Kanagawa, JP;
Yohei Takano, Kanagawa, JP;
Kazuhiro Fujita, Tokyo, JP;
Takashi Sasaki, Kanagawa, JP;
Shigeaki Imai, Kanagawa, JP;
Makoto Hirakawa, Tokyo, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A light source device includes: a first light source to emit first color light; a second light source to emit second color light; a wavelength conversion unit to convert at least a portion of the first color light into a third color light; a light incident element to which the first color light, the second color light, and the third color light enter; a first filter to reflect the first color light toward the wavelength conversion unit; and a second filter to reflect the second color light toward the light incident element. The first filter and the second filter are separately disposed on an optical path of the third color light between the wavelength conversion unit and the light incident element.