LED DRIVER FOR TRACKING AND COMPENSATING THE DECREASE IN LAMP LUMEN MAINTENANCE FACTOR (L) ACCORDING TO THE TEMPERATURE (Ts)) MEASURED IN THE LED PACKAGE AND LED LIGHTING FIXTURES FOR ROAD LIGHTING INCLUDING THE SAME

摘要

According to one embodiment, the LED package including a plurality of LED (Light Emitting Diode); and a plurality of luminous flux maintenance ratios representing the ratio of the luminous flux at the time of use to the initial luminous flux at each of a plurality of reference temperatures for the LED package, and information about a plurality of luminous flux retention times corresponding to the plurality of luminous flux maintenance ratios, One reference temperature greater than or equal to the measured temperature of the LED package among the plurality of reference temperatures is determined as a compensation temperature, and the LED package is based on the plurality of luminous flux retention rates and the plurality of luminous flux retention times at the compensation temperature. A luminaire for road lighting is provided, including; a processor that updates the power applied to the LED package according to the usage time.