Patent attributes
A temperature adjusting device of the present invention is provided with: an LED light source 11r, 11g and 11b, a temperature sensor 9 for detecting an ambient temperature of the LED light source 11r, 11g and 11b, a cooling fan for cooling the LED light source 11r, 11g and 11b, a driving circuit 22 for driving the cooling fan 20, a control unit 4 that controls a voltage to be applied to the cooling fan 20 so as to set the ambient temperature within a predetermined range based upon the results of detection by the temperature sensor 9 and a heater placed near the LED light source 11r, 11g and 11b, and in this arrangement, the control unit is designed to control the applied voltage to the heater so as to reduce the heating value of the heater in cooperation with lighting of the LED light source 11r, 11g and 11b.
