OPTICAL SYSTEM BASED ON LED AND METHOD FOR AGING COMPENSATION THEREOF

摘要

An optical system based on an LED(Light Emitting Diode) and an aging compensation method thereof are provided to improve the quality of an image by removing the non-uniformity of color between LED blocks by supplying relatively more current to an aged LED group. An optical system based on an LED includes at least one LED block(10), a sensor(50), and a control block(30). The LED block is composed of the predetermined number of LEDs. The sensor senses the output value of each LED block. The control block generates a predetermined compensation ratio by comparing the initial output value for each LED block in an initial state and the comparison value for each LED block sensed from the sensor at the time of comparison, and controls an amount of currents supplied to each LED block according to the compensation ratio.