Patent ID: 9585215
Date: 2017-02-28
CPC Classifications: H05B

Claim:
1. A lighting apparatus comprising: a lighting unit comprising LEDs divided into a plurality of LED groups connected in series, the plurality of LED groups being divided into a first lighting group and a second lighting group, and configured to emit light using a rectified voltage; a first driver configured to provide a first current path corresponding to a change of the rectified voltage to each of the LED groups included in the first lighting group; a first sensing resistor connected to the first current path; a second driver configured to provide a second current path corresponding to a change of the rectified voltage to each of the LED groups included in the second lighting group; and a second sensing resistor connected between the second current path and the first sensing resistor, wherein the first driver compares first reference voltages obtained by dividing a difference between a constant voltage and a first ground voltage to a first sensing voltage applied to the first sensing resistor, and regulates a current flow between the first sensing resistor and the LED groups included in the first lighting group, in order to provide the first current path, and the second driver compares second reference voltage obtained bv dividing a difference between the constant voltage and a second ground voltage to a second sensing voltage applied to the second sensing resistor, and regulates a current flow between the second sensing resistor and the LED groups included in the second lighting group, in order to provide the second current path.