Patent ID: 8324831

Claim:
A light emitting diode (LED) illuminating system, comprising: an LED lamp; a sensor for detecting a temperature around the LED illuminating system; a memory for receiving the detected temperature, and storing the detected temperature and a predetermined comparison table of different temperatures and optimized working voltages therein; a controller for accessing the detected temperature stored in the memory, searching the table of different temperatures and optimized voltages to find an optimized working voltage of the LED illuminating system corresponding to the detected temperature; an AC/DC convertor for converting an AC power into a DC power, and adjusting a voltage of the DC power to have a value equal to the optimized working voltage; a DC/DC convertor for receiving the DC power with the optimized DC voltage, converting the DC power with the optimized DC voltage into another DC power, and outputting the another DC power to the LED lamp; and a current detector for detecting a current variation of the another DC power output by the DC/DC converter, wherein the detected current variation is stored in the memory, and the controller adjusts a current of the another DC power output by the DC/DC converter to compensate the current variation, thereby stabilizing the current of the another DC power output by the DC/DC converter to the LED lamp.