LED ROADWAY LUMINARIES DEVICE BASED ON MESOPIC VISION AND METHOD FOR USING THE SAME

摘要

PURPOSE: An LED roadway lighting device based on mesopic vision and a method for using the same are provided to alleviate the fatigue of eyes by controlling the light quantity of an LED package according to back brightness. CONSTITUTION: A spectrometer(150) measures the spectrum of light. The light is emitted from the light source of an LED package and reflected on road surface. The spectrum sensor(160) calculates a background brightness value. An LED package control unit(140) controls power supplied to the LED package according to the background brightness value. The LED package control unit changes the brightness value according to the amount of light.