A cooling apparatus able to rotate cooling fans with required lowest limit speeds, and able to suppress power consumption and generated noise includes a cooling unit for cooling an object to be cooled by a cooling amount in accordance with a level of a supplied drive signal; a temperature detector for detecting the temperature of the object; a drive circuit for amplifying the drive signal and supplying an output signal to the cooling unit; a memory for storing correction data for correcting circuit error in the drive circuit; and a control unit for generating the drive signal based on the detected temperature of the object, correcting error in the output signal of the drive circuit based on the correction data stored in the memory, and outputting the generated drive signal to the drive circuit. The cooling apparatus may be used in a projection type display device.