Patent ID: 8441201

Claim:
An LED driving apparatus comprising: a power supplying unit, which includes a transformer having a primary coil and a plurality of secondary coils, and which outputs alternating power from the plurality of secondary coils; a first series connector that is configured by a first coil and a first rectification smoothing circuit connected to a first secondary coil of the plurality of secondary coils; a first LED load, which includes a plurality of LEDs connected in series, and to which power smoothed from the first rectification smoothing circuit is supplied; a second series connector that is configured by a second coil and a second rectification smoothing circuit connected to the first secondary coil; a second LED load, which includes a plurality of LEDs connected in series, and to which power smoothed from the second rectification smoothing circuit is supplied; a power control unit that controls power to be supplied to the first and second LED loads based on currents flowing in the first and second LED loads; and a direct current load that is connected to both ends of a second secondary coil of the plurality of secondary coils, wherein the first and second coils are electromagnetically coupled to each other, and wherein the power supplying unit controls the alternating power based on the power supplied to the direct current load.