Patent ID: 8872073
Filing Date: 2014-10-28
Classification: G03G

Abstract:
1. An image forming apparatus, comprising: a fixing device having a heat source, said heat source being arranged to heat when an alternate current signal is supplied thereto; a conduction control circuit for controlling an alternate current power source with a conduction control signal, and for supplying the alternate current signal to the heat source, said conduction control circuit including a conduction control element for switching between conduction and non-conduction of the heat source through the alternate current signal at a zero cross timing of the alternate current power source according to the conduction control signal; and a control unit for outputting the conduction control signal in a specific pattern including a conduction period and a non-conduction period alternately repeating, wherein said control unit is configured to generate the conduction control signal at a timing not synchronizing with the zero cross timing, and said conduction control circuit is configured to generate the alternate current signal corresponding to a half wave of the alternate current power source when the zero cross timing is detected during the conduction period of the conduction control signal.