Electric power supply apparatus of electric apparatus

An electric power supply apparatus of an electric apparatus, the electric power supply apparatus comprising:

• a main power supply unit configured to convert a voltage of an input alternating current (AC) power to a main power, which is required to control an operation of the electric apparatus, and to provide the main power;
• a first switch unit configured to allow the input AC power source to be supplied to the main power supply unit or to block the input AC power source from being supplied to the main power supply unit;
• a low power supply unit configured to convert the voltage of the input AC power source and to provide the converted voltage;
• a power storage unit configured to be charged by receiving the converted voltage from the low power supply unit, and to provide the charged power as a standby power of the electric apparatus;
• a voltage detection unit configured to detect a level of voltage charged in the power storage unit;
• a second switch unit configured to allow the voltage of the low power supply unit to be supplied to the power storage unit, or to block the voltage of the low power supply unit from being supplied to the power storage unit according to the level of voltage charged in the power storage unit detected through the voltage detection unit;
• and
• a state detection unit configured to receive the power from the power storage unit to provide the received power to a circuit requiring a standby power, and to perform control such that the AC power source is allowed to be supplied to the main power supply unit, or is blocked from being supplied to the main power supply unit by transmitting a switch-on control signal or a switch-off control signal to the first switch unit according to a control signal that is input from an external part.