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:
Mar. 22, 2005
Filed:
Apr. 01, 2003
Satoru Kanno, Chiba, JP;
Satoru Kanno, Chiba, JP;
Canon Kabushiki Kaisha, , JP;
Abstract
It is an object of the present invention to provide an image forming apparatus that is capable controlling the rotational speed of a polygon motor so as to reduce variations in the rotational speed of the polygon motor to the minimum possible level and enable steady rotation of the polygon motor with ease in controlling the rotational speed of the polygon motor to a target speed. When a photosensitive drum is exposure-scanned while the traveling direction of an exposure laser beam is deflected by the polygon mirror, a polygon motor for driving the polygon mirror is controlled according to target periods or target speeds of the polygon motor, which are determined for respective mirror planes of the polygon mirror.