An image forming apparatus includes an image bearing member; a charging member for electrically charging the image bearing member through electric discharge by applying, to the charging member, a DC voltage biased with an AC voltage; and voltage condition determination means for determining a voltage condition during image formation on the basis of each of the values of AC currents obtained by applying a plurality of DC voltages biased with the AC voltages to said charging member.

 
Web www.patentalert.com

< Method and device for configuring an electronic document processing peripheral in a communication network

> Information processing apparatus, print data forming method, print control program, and memory medium

> Printing system and its control method, printer and its control method, and image sensing apparatus and its control method

~ 00590