Patent ID: 9301366
Filing Date: 2016-03-29
CPC Classification: H05B

Claim Text:
1. An apparatus for driving a first light-emitting diode part and a second light-emitting diode part connected in series, the first light-emitting diode part comprising one or more light-emitting diodes, the second light-emitting diode part being connected to the first light-emitting diode part and comprising one or more light-emitting diodes, the apparatus comprising: a rectification part, connected to the first light-emitting diode part, for rectifying AC power; a constant-current part, connected between the rectification part and the first light-emitting diode part, for outputting a current of a preset magnitude regardless of a rectified voltage output from the rectification part; a first resistor, connected between the first light-emitting diode part and the second light-emitting diode part, for detecting a current that flows through the first light-emitting diode part; a back-current prevention part, connected between the first light-emitting diode part and the first resistor, for preventing a back-current; a second resistor, connected between the second light-emitting diode part and a ground, for detecting a current that flows through the second light-emitting diode part; a first light-emitting diode auxiliary drive part, connected to the first resistor, for controlling light emission of the second light-emitting diode part depending on the current detected by the first resistor; and a second light-emitting diode auxiliary drive part, connected to the second resistor, for controlling light emission of the first light-emitting diode part depending on the current detected by the second resistor, wherein the first light-emitting diode auxiliary drive part comprises, wherein the second light-emitting diode auxiliary drive part comprises,