Patent ID: 8902155

Claim:
An electronic apparatus including a normal mode in which first electric power is consumed and a power-saving mode in which second electric power lower than the first electric power is consumed, the electronic apparatus comprising: a first sensor having a first power consumption in the normal mode, for at least a predetermined first period of time, and a second power consumption in the power-saving mode after the first period of time, the second power consumption being lower than the first power consumption; a second sensor, which is a different type of sensor than the first sensor, the second sensor having a third power consumption in the normal mode and a fourth power consumption in the power-saving mode, the fourth power consumption being lower than the third power consumption; and at least one processor configured to: restrict, in the power-saving mode, supply of power to the first sensor during a first power-saving mode for a predetermined second period of time in which the first sensor operates at the second power consumption and the second sensor operates at the third power consumption until a predetermined threshold time elapses, and in response to the threshold time elapsing without a trigger being detected, setting the second sensor to the power-saving mode such that the first sensor operates at the second power consumption and the second sensor operates at the fourth power consumption during a second power-saving mode for a third period of time; detect the trigger for causing the power-saving mode to be restored to the normal mode, during the third period of time after the second period of time has elapsed, by using the second sensor set to the power-saving mode and operating at the fourth power consumption; and cause the power-saving mode to be restored to the normal mode based on the detected trigger.