| 摘要 |
<p>A charging device (200) according to an embodiment includes a surface potential sensor (3) configured to output a result of detecting a surface potential of a photoconductor (1), on which charge is deposited by the charging device (200), of an image forming apparatus and a main control unit (100). The main control unit (100) is configured to perform a charging-current determining process which determines a charging-current setpoint value, which is an output setpoint value for constant current control of a charging bias to be fed from a corona power supply (16), based on a difference between the result of detection output from the surface potential sensor (3) and a grid setpoint value, which is an output setpoint value for constant voltage control of a grid bias to be fed from a grid power supply (17), at predetermined timing.</p> |
