LEDs have the advantages of high efficiency, low power consumption, environmental friendliness and long life. Nowadays with brightness of LEDs increasing rapidly, it has various applications such as street light, flat panel backlighting, vehicle forward lamp and general illumination. The increasing demand for light emitting diodes (LEDs) has been absorbed by a number of application fields, including display backlighting, communications, medical services, signage, and general illumination. When high power LEDs are applied under complex service conditions, especially encounter thermal fluctuatio...
