Patent ID: 8755707
Filing Date: 2014-06-17
Classification: G03G

Abstract:
1. An image forming device, comprising: a heating member to be heated by a heat source, the heating member being configured to fix a developed image to a recording sheet; a thermal detecting unit spaced apart from the heating, member, the thermal detecting unit being configured to detect a first temperature of the heating member; and a control unit configured to use a function to calculate a second temperature of the heating member on the basis of the detected first temperature, the control unit being configured to control the heat source on the basis of the second temperature, the function having a rate of change that increases as the first temperature at a start of heating the heating member decreases, wherein the control unit is configured to calculate the second temperature by using the rate of change which is determined based only on the first temperature at the start of heating detected only by the thermal detecting unit spaced apart from the heating member and is configured to calculate the second temperature while maintaining the determined rate of change during warm up of the heating member.