Patent ID: 7184676

Claim:
A charging device comprising: charging means for charging a member to be charged to a set potential, said charging means having a first charger, which charges the member to be charged, and a second charger, which is disposed on a downstream side of said first charger with respect to a rotating direction of the member to be charged, and to which a voltage having the same polarity as said first charger is applied to charge an area charged by said first charger, said second charger bringing a carrying member into contact with the member to be charged to charge the area, said carrying member carrying on a surface thereof magnetic particles having a triboelectrification polarity opposite to a charging polarity of said second charger; and voltage controlling means, which controls a voltage applied to said second charger in such a manner that the voltage applied to said second charger is turned ON before the area charged by said first charger reaches said second charger, and is turned OFF after a posterior end portion of the area charged by said first charger with respect to the rotating direction passes said second charger.