ELECTRIFYING CONTROLLER FOR ELECTRIFYING DEVICE, METHOD FOR CONTROLLING ELECTRIFICATION FOR ELECTRIFYING DEVICE, AND IMAGE FORMING DEVICE

摘要

PROBLEM TO BE SOLVED: To control the electrification of a corona electrifier so as to make potential by electrification on the surface of a photoreceptor always adequate without using a potential sensor and a circuit accompanying the sensor. ;SOLUTION: A potential impressed on the electrifying wire 11 of the corona electrifier 2 from a high voltage generating device 15 is controlled to be constant by an output current detecting circuit 14, a control value deciding device 17 decides a control value for controlling the potential impressed on the shield electrode 12 (and/or grid electrode) of the electrifier 2 from a potential generating device 16 based on an electrification charge holding parameter (temperature and humidity in the vicinity of the surface of photoreceptor 1, and copying number, etc.) detected by an electrification charge holding parameter detecting device 18, and the specified potential is impressed on the electrode 12 (and/or grid electrode) from the device 16 based on the control value so as to control the electrification of the electrifier 2, so that the potential by electrification on the surface of the photoreceptor 1 can be always adequately controlled.;COPYRIGHT: (C)1998,JPO