Patent ID: 6418280
Filing Date: 2002-07-09
Classification: G03G,H04N

Abstract:
An electrophotographic apparatus comprising:a photosensitive member; electrostatic image forming means, for forming an electrostatic image on said photosensitive member, including electrification means for electrifying said photosensitive member and exposure means for exposing said photosensitive member; detection means, for detecting a surface potential on said photosensitive member; determination means, for employing the detection results obtained by said detection means to determine an electrification amount for said electrification means and an exposure control value for said exposure means, for determining said electrification amount for said electrification means, so that a dark portion potential on said photosensitive member is substantially a target dark portion potential selected from multiple target dark portion potentials, for determining a first exposure control value for said exposure means, so that a light portion potential, which is based on said determined electrification amount and which is formed on said photosensitive member by said electrification means and said exposure means, is substantially a first target light portion potential, and for determining, in accordance with said first exposure control value and said selected target dark portion potential, a second exposure control value for said exposure means, so that a light portion potential on said electrostatic image is substantially a second target light portion potential.