ILLUMINATION SYSTEM AND METHOD FOR RECYCLING LIGHT TO INCREASE THE BRIGHTNESS OF THE LIGHT SOURCE

摘要

An illumination system for increasing the brightness of a light source comprises an optical recycling device (200) coupled to the light source (100), preferably light emitting diode (LED), for spatially and/or angularly recycling light. The optical recycling device (200) spatially recycles a portion of rays of light emitted by the LED back to the light source (100) using a reflector or mirror (400) and/or angularly recycles high angle rays of light and transmits small angle rays of light, thereby increasing the brightness of the light source's (100) output.