Patent ID: 7949273

Claim:
A fixing device temperature control method comprising the steps of: detecting a surface temperature of a heating rotation unit in a position located apart from a surface of the heating rotation unit by using a noncontact first temperature detecting section; detecting a temperature of a pressurizing unit, which is placed inside a pressurizing rotation unit and pressurizes the pressurizing rotation unit against the heating rotation unit from inside of the pressurizing rotation unit, by using a second temperature detecting section; and adjusting a surface temperature of the heating rotation unit by controlling a heating section which heats the heating rotation unit with use of a control section on the basis of a detection temperature of the first temperature detecting section and a detection temperature of the second temperature detecting section, wherein a first corrected temperature is obtained by multiplying the detection temperature of the first temperature detecting section by a first correction factor, a second corrected temperature is obtained by multiplying the first corrected temperature by an optimal second correction factor obtained on the basis of the detection temperature of the second temperature detecting section, and the control section controls the heating section by using the second corrected temperature as an input.