Patent ID: 7255410

Claim:
An electronic device comprising: a driver circuit for controlling driving of a load; a system control circuit for determining a status of said electronic device and for controlling said electronic device; an AC/DC converting circuit for converting an input AC voltage into a first DC voltage to then supply the first DC voltage to the load; a voltage converting circuit for converting the first DC voltage into a second DC voltage to then supply the second DC voltage to said driver circuit and said system control circuit, and for keeping the second DC voltage higher than a reset voltage of said driver circuit at least until the first DC voltage drops to a guarantee voltage of the load; switching means connected to a supply line of the first DC voltage, the supply line of the first DC voltage connecting said AC/DC converting circuit with the load, said switching means disconnecting the connection of the supply line of the first DC voltage on the basis of an OFF signal output when said system control circuit determines a predetermined status; a diode connected in parallel with said switching means in such a manner as to have a cathode thereof connected to a terminal at said AC/DC converting circuit side of said switching means and an anode thereof connected to a terminal at the load side of said switching means; and a capacitor connected between a ground and the supply line of the first DC voltage between the load and said switching means.