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:
Jul. 09, 2002
Filed:
Mar. 13, 2001
Yuji Kamiya, Abiko, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An electrophotographic apparatus has a detector, for detecting a surface potential on the photosensitive member, a determination unit, for employing the detection results obtained by the detector to determine an electrification amount for the electrification unit and an exposure control value for the exposure unit, for determining the electrification amount for the electrification unit, so that a dark portion potential on the photosensitive member is substantially a target dark portion potential selected from multiple target dark portion potentials, for determining a first exposure control value for the exposure unit, so that a light portion potential, which is based on the determined electrification amount and which is formed on the photosensitive member by the electrification unit and the exposure unit, is substantially a first target light portion potential, and for determining, in accordance with the first exposure control value and the selected target dark portion potential, a second exposure control value for the exposure unit, so that a light portion potential on the electrostatic image is substantially a second target light portion potential.