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:
Feb. 27, 2001
Filed:
Jul. 19, 1999
Hiromasa Kanno, Niigata, JP;
NEC Corporation, Tokyo, JP;
Abstract
An image formation apparatus of the present invention forms an electrostatic latent image on a moving photosensitive belt by a laser beam produced by a laser device. A belt edge detector,detects an edge portion (belt edge) of a photosensitive belt,in a main scanning direction. A virtual edge detection circuit,generates a virtual edge detection signal,A which changes a generation timing in accordance with a change of a detection timing of the belt edge detected by the belt edge detector,. The generation timing of the virtual edge detection signal,A does not almost follow the detection timing of the belt edge which changes by flaws and non-linearity of the belt edge, and changes in accordance with a slow change of the detection timing. A synchronizing signal generation circuit,and a driving circuit,drives the laser device so as to start a writing of an image data by the laser beam in synchronization with the virtual edge detection signal.