Patent ID: 9173265
Filing Date: 2015-10-27
Classification: H05B

Abstract:
1. A light emitting diode (LED) driving apparatus comprising: a light emitting unit including a plurality of LEDs connected in series, the plurality of LEDs being turned on according to a voltage level of provided rectified power to emit light; a switching unit including a plurality of switches respectively corresponding to the plurality of LEDs, and providing a turn-on path for a corresponding LED among the plurality of LEDs according to the voltage level of the rectified power; a detecting unit including a detection resistor commonly connected to the plurality of switches, the detection resistor detecting currents flowing in the LEDs turned on by the plurality of switches; and a driving unit including a plurality of drivers respectively driving the plurality of switches of the switching unit, the plurality of respective drivers driving the switches corresponding thereto by comparing detection voltages of the currents detected by the detecting unit with a plurality of preset reference voltages, and the plurality of respective drivers having different preset voltages set therein and adding the differently set preset voltages to the detection voltages.