| 摘要 |
PROBLEM TO BE SOLVED: To provide a heating device that can detect floating of temperature detection means from a heating member despite heating of the heating member.SOLUTION: A heating device includes: a fixing film 103 that is provided to be rotatable around a heater 102 provided therein; a thermistor 105 that is in contact with the heater 102 to detect the temperature of the heater 102; a bias voltage application circuit 501 that applies an AC voltage to the fixing film 103; a superposed voltage detection circuit 22 that detects a superposed voltage to be transferred to the thermistor 105 when the bias voltage application circuit 501 has applied the AC voltage; and a control unit 504 that determines contact between the heater 102 and thermistor 105 on the basis of a voltage detected by the superposed voltage detection circuit 22. |
