Patent ID: 8578185

Claim:
A power supply control device comprising: a power supply controller that selectively performs a power supply mode that receives power from a main power source and supplies power to a processor which is operated by the power and a power saving mode that stops the supply of power to the processor; a detector that detects a moving body in a predetermined range in the vicinity of the processor; a power supply mode change instruction unit that controls the power supply controller to change an operation mode from the power saving mode to the power supply mode when the detector detects the moving body; an information history unit that acquires information related to an operation for the processor in the power supply mode; a sensitivity adjusting unit that adjusts a detection sensitivity of the detector for the moving body on the basis of the information acquired by the information history unit for a period from a change of the operation mode from the power saving mode to the power supply mode to a change of the operation mode to a next power saving mode, a timer unit that measures a period for which no process is scheduled and no process is processed by the processor in the power supply mode; a power saving mode change instruction unit that controls the power supply controller to change the operation mode from the power supply mode to the power saving mode when a count value of the timer unit is a predetermined reference value, which is a standard for changing the operation mode to the power saving mode; a power saving mode cancellation unit that is valid in the power saving mode and is operated to input an instruction to change the operation mode from the power saving mode to the power supply mode; and a reference value adjusting unit that adjusts the reference value on the basis of the operation of the power saving mode cancellation unit.