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Technology Overview

A single LED can produce only a limited amount of light and a single colour at a time. To produce the white light necessary for SSL, light spanning the visible spectrum must be generated in correct proportions. To achieve this effect, three approaches are used for generating white light with LED’s: wavelength conversion, colour mixing and Homeopitaxial ZnSe.

Wavelength conversion involves converting some or all of the LED’s output into visible wavelength.

Colour mixing involves utilizing multiple LEDs in a lamp and varying the intensity of each to produce white light. The lamp contains minimum of two LEDs but can have more than that.

Homeopitaxial ZnSe is a technology where a LED is grown on a ZnSe substrate. It simultaneously produces blue light fro the active region and yellow emission from the substrate. The resulting white light has a wavelength spectrum on par with UV LEDs.