Patent ID: 9164413
Filing Date: 2015-10-20
Classification: G03G

Abstract:
1. An image forming apparatus, comprising: an attachment unit to which a load is attached; an applying circuit configured to apply an applying voltage to the load attached to the attachment unit; a voltage detection circuit configured to detect the applying voltage outputted by the applying circuit; a current detection unit configured to detect a load current produced by application of the applying voltage to the load by the applying circuit; and a control device, wherein the control device is configured to: subject the applying circuit to constant current control in accordance with a detected value of the current detection unit so that the load current for the load becomes a target current; switch to a constant voltage control by which the applying voltage is controlled to become a target voltage when an absolute value of the load current detected by the current detection unit is smaller than a determination value and an absolute value of the applying voltage detected by the voltage detection circuit is larger than or equal to a threshold during execution of the constant current control; and switch control for the applying circuit from the constant current control to an additional constant voltage control by which the applying voltage is controlled to become an additional target voltage when the absolute value of the load current detected by the current detection unit is larger than or equal to the determination value and the absolute value of the applying voltage detected by the voltage detection circuit is larger than or equal to an additional threshold which is larger than the threshold.