Patent ID: 8266358

Claim:
An image processing device comprising: a first control unit to control a normal operating mode during which image processing is performed; a second control unit to control an energy-saving mode during which power consumption is lower than during the normal operating mode; an interrupt request receiver connected to an external device to receive an interrupt request from the external device; interrupt factor distributors to distribute the interrupt request received by the interrupt request receiver based on whether or not the interrupt request includes a predetermined interrupt factor; interrupt request notification units to notify the second control unit as well as the first control unit of the interrupt request in accordance with distribution results from the interrupt factor distributors; job adjustors to control transfer of a job between the first control unit and the second control unit based on notification from the interrupt request notification units; a detector to detect a power recovery factor; a measuring unit to measure a time for the energy-saving mode; a power supply unit to supply power to the first control unit when the time measured by the measuring unit reaches a predetermined period of time; and a status notification unit to notify the detector of a status of the first control unit to which power is supplied from the power supply unit, wherein an operating mode of the image processing device is changed from the energy-saving mode to the normal operating mode based on the power recovery factor detected by the detector.