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:
Apr. 17, 2012
Filed:
Mar. 06, 2008
Hideta Nishizawa, Kawasaki, JP;
Hideta Nishizawa, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus includes a light beam generation unit, a light deflector having a resonance frequency and deflecting a light beam, a photosensitive member to which the deflected light beam is irradiated, and a driving control unit driving and controlling the light deflector. The driving control unit can measure a difference between a frequency of a light-deflector driving signal and the light-deflector resonance frequency and a non-drawing time during which an image is not formed by the light deflector. When the difference between the frequency of the driving signal and the light-deflector resonance frequency is equal to or larger than a predetermined value and the non-drawing time is equal to or longer than a predetermined time, the driving control unit produces the driving signal having a frequency corresponding to the resonance frequency of the light deflector and supplies the produced driving signal to the light deflector.