Patent ID: 8456870

Claim:
An image forming device receiving print data to perform printing comprising: a power supplier to generate a first output power source and a second output power source in response to an external power supply and a power control signal and to use the second output power source to control operating modes of the power supplier; a print controller to receive the first output power source to control the printing and an operating state of the image forming device; and a print engine part to receive the second output power source and the control signal outputted from the print controller to perform printing, wherein the power supplier comprises a power converter to generate an unrectified first output power source and an unrectified second output power source in response to the external power supply and the power control signal; a power output part to rectify and smooth the output unrectified first and unrectified second output power sources to produce the first and second output power sources; a first output controller to receive the first output power source from the power output part and generates the power control signal used at the power converter; and a second output controller to receive the second output power source from the power output part and to control the operating modes of the power output part, wherein the power output part comprises a first output part to rectify and smooth the first output power source, and a second output part to rectify and smooth the second output power sources, the second output controller connects the first output part and the second output part, and the second output controller comprises a first switching circuit with one end connected to the first output part and another end is connected to the second output part.