Patent ID: 8547564

Claim:
An image processing apparatus connectable to a plurality of host devices, the image processing apparatus comprising: an image forming unit for forming an image based on image data transmitted from the plurality of host devices; a power supply unit for supplying power to a power system including the image forming unit; a power control unit for controlling the power supplied from the power supply unit to the power system; a request transmitter-receiver; and a host information memory, wherein the power control unit shifts to a power saving mode if no processing is performed within a first predetermined time period, wherein the power control unit halts the power supply unit after a second predetermined time period has passed following shifting to the power saving mode, wherein the plurality of host devices are registered at the host information memory, and the request transmitter-receiver determines, based on a current time, a specific host device among the plurality of host devices to transmit a response request, and wherein if the current time is within a prescribed time, the request transmitter-receiver transmits the response request to all of the registered host devices, and if the current time is not within the prescribed time, the request transmitter-receiver transmits the response request to a specific host device among the plurality of host devices.