Patent ID: 9301353
Filing Date: 2016-03-29
CPC Classification: H05B

Claim Text:
1. A light emitting diode driving apparatus comprising: a light emitting diode emitting light by receiving rectified power; a driver driving the light emitting diode based on a voltage level of the rectified power; and a controller limiting an operation of the driver based on a voltage applied to the driver and a hysteresis reference value, wherein the driver includes a driving comparator comparing a detection voltage depending on a current flowing in the light emitting diode with a light emitting reference voltage and a control switch switched on in the case in which the detection voltage has a level lower than that of the light emitting reference voltage, and wherein the controller turns on the control switch in the case in which the level of the drain voltage of the control switch is higher than the hysteresis reference value and turns off the control switch in the case in which the drain voltage of the control switch has a level lower than that of the hysteresis reference value.