Patent ID: 8059979
Filing Date: 2011-11-15
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a transfer unit for transferring a toner image carried on an image carrier to a recording medium; a power supply unit that, while taking a current value imparted to the transfer unit as a control target, supplies power conforming to the control target value to the transfer unit; a voltage detection unit for detecting a voltage value of the transfer unit; a current detection unit for detecting a value of a current flowing to the transfer unit; and a determination unit that acquires a detection value of the voltage detection unit and a detection value of the current detection unit and that determines, as a control target value for the power supply unit, an optimum value of a control target derived from a characteristic line showing a relationship between an electric characteristic value based on both detection values and an optimum value of the control target, wherein the characteristic line is a line showing a relationship of a change in absolute value of an optimum value of the control target shifting from an increasing tendency to a decreasing tendency with an increase in an absolute value of the electrical characteristic value.