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. 31, 2018
Filed:
Jul. 10, 2017
Takehiro Nishimori, Kanagawa, JP;
Tetsuya Fujioka, Kanagawa, JP;
Yasunari Mikutsu, Tokyo, JP;
Hideo Kanai, Kanagawa, JP;
Satoshi Tsuchiya, Kanagawa, JP;
Jun Mashimo, Tokyo, JP;
Takehiro Nishimori, Kanagawa, JP;
Tetsuya Fujioka, Kanagawa, JP;
Yasunari Mikutsu, Tokyo, JP;
Hideo Kanai, Kanagawa, JP;
Satoshi Tsuchiya, Kanagawa, JP;
Jun Mashimo, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A light source device includes a first light-source unit, a second light-source unit, and a third light-source unit emitting light of spectra different from each other. Each of the first through third light-source units includes a heat dissipator and a light source. The light source includes a light emitting device. The heat dissipators of the first through third light-source units are disposed in an ascending order of values of T/Q of the first through third light-source units, in a direction of cooling air flow. 'Q' represents a heat generation amount from the light source of each of the first through third light-source units, when the light sources are driven to obtain predetermined light intensity and lifespan. 'T' represents a preset, upper-limit temperature for the light emitting device of each of the first through third light-source units to obtain the predetermined light intensity and lifespan.