Patent ID: 8680782

Claim:
A light-emitting diode driving apparatus comprising: a rectifying circuit that can be connected to AC power supply and rectifies an AC voltage of the AC power supply to provide a rectified voltage; a first LED portion that is connected in series to the output-side of said rectifying circuit, and includes at least one LED device; a second LED portion that is connected in series to said first LED portion, and includes at least one LED device; a first bypass portion that is connected in series to said first LED portion and in parallel to said second LED portion, and controls the flowing current amount in said first LED portion; a fourth bypass portion that is connected in series to said second LED portion, and controls the flowing current amount in said first and second LED portions; a current detection portion that detects a current detection signal based on the flowing current amount on an output line along which said first and second LED portions are connected in series to each other; and a current control portion that provides an operation control signal for controlling operation of said first and fourth bypass portions based on the current detection signal, which is detected by said current detection portion, wherein said current control portion includes one output for providing said operation control signal, wherein said first and fourth bypass portions are connected in parallel to said one output.