Patent ID: 9188897
Filing Date: 2015-11-17
Classification: G03G

Abstract:
1. A transfer device comprising: a power supply controller configured to control a first control signal and a second control signal, which is a pulse signal, based on a condition relating to image formation; a DC power supply configured to output a DC voltage based on the first control signal; an AC power supply configured to selectively output either of the DC voltage output from the DC power supply or a superimposed voltage obtained by oscillating the DC voltage output from the DC power supply with an amplitude determined based on a duty ratio of the second control signal; and a transfer unit configured to transfer a developer onto a sheet using a voltage output from the AC power supply, wherein: the power supply controller further controls a third control signal based on the condition relating to image formation, and the AC power supply controls a frequency of the voltage output from the AC power supply based on a frequency of the third control signal.