Patent ID: 8452202
Filing Date: 2013-05-28
Classification: B41J,G03G

Abstract:
1. A heating device comprising: a heater which is driven by a power supplied from an AC power source; a switching portion which switches ON/OFF of the power supplied from the AC power source to the heater; a zero-cross signal output portion which outputs a zero-cross signal in response to a zero-cross point of an AC voltage outputted from the AC power source; and a controller which sends out a control signal to the switching portion to switch ON/OFF in response to the zero-cross signal in order to execute a switching control of the switching portion, wherein said controller is shiftable between a zero-cross interruption request state where the controller accepts execution of an interruption processing in accordance with an input of the zero-cross signal and a zero-cross interruption request cancel state where the controller does not accept an input of the zero-cross signal, the controller shifts to said zero-cross interruption request cancel state in order to disregard the zero-cross signal outputted and refrain from sending the control signal in response to the zero-cross signal to the switching portion during a predetermined time period after controlling the switching portion to switch ON/OFF, the controller shifts back to said zero-cross interruption request state after passage of said predetermined time period after controlling the switching portion to switch ON/OFF, and said predetermined time period is longer than a time period from when the switching portion switches ON/OFF until when the zero-cross signal is outputted caused by the switching operation of the switching portion.