Patent ID: 8531061

Claim:
A plug device in which a plug control circuit unit is embedded in a plug main body of an electrical product, which is inserted in a power source outlet, wherein the plug control circuit unit senses a current corresponding to a power on/off state of the electrical product and selectively supplies an AC power source to the electrical product or blocks the supply of the AC power source according to a time interval during which the sensed current is sustained and an external power-on request, and internal power source lines coupled to terminals of the plug main body are connected to power source supply lines of the electrical product, wherein the plug control circuit unit comprises: a switching unit connected to the internal power source lines; a current transformer configured to surround and couple the internal power source lines for transforming a magnetic field, which is generated by a current flowing through the internal power source lines, into a current value; a current detection unit configured to output a voltage value corresponding to the transformed current value; a radio frequency (RF) wireless unit configured to receive an external plug control wireless signal for controlling transmission of the supply of power to the electrical product; an infrared (IR) wireless unit configured to receive the external plug control wireless signal for controlling transmission of the supply of power to the electrical product; a controller configured to control the switching unit based on the outputted voltage value or in response to the external plug control wireless signal received through one of the RF or IR wireless units, wherein when the outputted voltage value corresponds to a non-operation of the electrical product, the controller checks the non-operation state while monitoring the current detection unit during a first time interval, and after the first time interval, when the non-operation state is maintained during a second time interval for verifying validity of the non-operation, the controller controls the switching unit to be switched off; and a remote control device having a keypad, a remote RF wireless unit, a remote IR wireless unit, a mode switch, and a remote controller, wherein in response to the mode switch being set to an infrared transmission mode, the remote control device transmits a first IR signal to the plug main body and a second IR signal to the electrical product, and in response to the mode switch being set to an RF transmission mode, the remote control device transmits an RF signal to the plug main body and a third IR signal to the electrical product.