| 摘要 |
PROBLEM TO BE SOLVED: To perform, when there are a plurality of heat sources to heat a fixing member, temperature control of the plurality of heat sources with a temperature sensor common to the heat sources.SOLUTION: There is provided a fixing device including a fixing member, a plurality of heat sources for heating the fixing member, a pressure member that presses the fixing member to form a fixing nip part, a sensor that detects the surface temperature of the fixing member, and heating control means for controlling the plurality of heat sources on the basis of the temperature detected by the sensor. The fixing device uses a multi-eye thermopile array as the sensor, allocates a plurality of detection elements of the thermopile to each of the plurality of heat sources, uses one of the plurality of detection elements allocated to each of the heat sources to temperature control of the heat sources based on a set target temperature, uses the rest of the detection elements to detect the maximum temperature or minimum temperature, and when the detected maximum temperature exceeds a threshold, decreases the target temperature, and when the detected minimum temperature is below another threshold, increases the target temperature. |
