Patent ID: 9547362
Date: 2017-01-17
CPC Classifications: G03G,G06F

Claim:
1. An apparatus comprising: a power supply which supplies operating power for the apparatus; a switching circuit unit which switches to selectively supply the operating power to the apparatus, the switching circuit unit comprising a power switch; a memory unit which stores information about power status of the switching circuit unit; and a controller which records the power status of the switching circuit unit as “on” in the memory unit if the operating power is supplied to the apparatus when the switching circuit unit is turned on, and records the power status of the switching circuit unit as “off” in the memory unit if the operating power is not supplied to the apparatus when the switching circuit unit is turned off, wherein the switching circuit unit further comprises a first switch turned on or off in response to a power control signal from the controller, wherein the switching circuit unit receives standby power, and the controller is not receiving the operating power after the first switch of the switching circuit unit is turned off by the power control signal from the controller, and wherein, if power is abnormally shut off and then supplied again, the controller reads the power status of the switching circuit unit from the memory, outputs the power control signal to continuously turn on the switching circuit unit when the read power status of the switching circuit unit is “on”, and outputs the power control signal to turn off the switching circuit unit when the read power status of the switching circuit unit is “off”.