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. 29, 2013
Filed:
Mar. 03, 2009
Masahiro Soeda, Kanagawa, JP;
Tomohiro Nakajima, Kanagawa, JP;
Masahiro Soeda, Kanagawa, JP;
Tomohiro Nakajima, Kanagawa, JP;
Ricoh Company, Tokyo, JP;
Abstract
An optical scanning device is disclosed that includes a light source unit, a light source drive unit, a deflection unit, a scanning image optical system, and a light beam detection unit. In the optical scanning device, the light source drive unit controls an amount of light emission of the light source unit, and a light emission amount control period in which the light source unit is forcibly turned OFF is set to the light source drive unit during a period from when the deflection unit deflects to an edge of a scanning angle for scanning the main scanning area to when the deflection unit deflects to a maximum deflection angle of the deflection unit within a non-image forming period.