Researchers at Rensselaer Polytechnic Institute¡¯s Lighting Research Center have come up with a way to achieve a development priority: extracting more light from white LEDs. With their scattered-photon-extraction approach, they move the phosphor that produces the visible white light away from the semiconductor and shape the LED lens' geometry. As a result, photons that the LED normally absorbs internally-typically, more than half the LED¡¯s output-can escape as visible light. The RPI researchers claim that the technique offers 30 to 60% better light output and luminous efficacy than standard commercial white LEDs provide.
For further details, go to http://news.rpi.edu/update.do?artcenter-key=697&setappvar=page(1). Rensselaer Polytechnic Institute, www.rpi.edu
Researchers at Rensselaer Polytechnic Institute¡¯s Lighting Research Center have come up with a way to achieve a development priority: extracting more light from white LEDs. With their scattered-photon-extraction approach, they move the phosphor that produces the visible white light away from the semiconductor and shape the LED lens' geometry. As a result, photons that the LED normally absorbs internally-typically, more than half the LED¡¯s output-can escape as visible light. The RPI researchers claim that the technique offers 30 to 60% better light output and luminous efficacy than standard commercial white LEDs provide.
