To further increase a power-saving effect of a power-saving state in power supply control for power saving by reducing the quantity of power to be supplied when an apparatus is not in operation.
The apparatus is provided with a direct-current power supply circuit 105, a control circuit 106 to switch an operation state of the apparatus to be supplied with power between a working state to supply electric power for driving the apparatus from the direct-current power supply circuit 105 and a power-saving state to supply the electric power lower than the electric power supplied in the working state, a monitoring circuit 104 to monitor whether a restoration factor to shift the operation state from the power-saving state to the working state is generated or not in the power-saving state, an antenna portion 101 to receive a radio wave, and a radio wave generating circuit 102 which generates the electric power from the received radio wave and supplies the generated electric power to the monitoring circuit 104. The control circuit 106 controls the apparatus to enter the working state from the power-saving state when the restoration factor is generated.
COPYRIGHT: (C)2009,JPO&INPIT
Eiji Nemoto
Hiroki Okubo
Yuji Matsuda
Yusuke Ozaki
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