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:
May. 19, 2015
Filed:
May. 23, 2008
Yasuhiro Nihei, Yokohama, JP;
Masaaki Ishida, Yokohama, JP;
Atsufumi Omori, Chigasaki, JP;
Jun Tanabe, Sagamihara, JP;
Yasuhiro Nihei, Yokohama, JP;
Masaaki Ishida, Yokohama, JP;
Atsufumi Omori, Chigasaki, JP;
Jun Tanabe, Sagamihara, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A light source driving device which drives a plurality of light emitting parts provided in a light source to emit a plurality of light beams based on image information, includes a plurality of driving circuits configured to drive the plurality of light emitting parts. Each of the driving circuits includes a signal generation circuit that generates a modulation signal to control a light emitting intensity of the corresponding light emitting part based on the image information, a detection circuit that detects a light emitting status of the corresponding light emitting part; and a light emitting circuit that outputs a driving signal to the corresponding light emitting part to emit a light beam in accordance with the modulation signal and adjustment data obtained based on the light emitting status of at least one of the plurality of light emitting parts.