Patent ID: 6529221
Filing Date: 2003-03-04
Classification: G03G,H04N

Abstract:
An electrophotographic apparatus comprising:a photosensitive body: a charging member, provided to be capable of contacting with said photosensitive body, for charging said photosensitive body, an oscillating voltage being applied to said charging member; and exposing means for exposing said photosensitive body charged by said charging member, by an exposure beam based on image information to form an electrostatic image, wherein when a spot ratio which is a ratio of a spot diameter of the exposure beam to a size of one pixel of the electrostatic image is represented by &agr;, a pixel density of the electrostatic image is represented by R (dot/mm), a process speed of said photosensitive body is represented by V (mm/sec), a frequency of the oscillating voltage is represented by f (Hz) and a NESA sensitivity of said photosensitive body is represented by &ggr; (VÂ·cm2/&mgr;m), 2.5&lE;&agr;, 4.2&lE;RÃ—V/f&lE;7.0, and 2,000&lE;&ggr; are satisfied.