Patent ID: 8403523
Filing Date: 2013-03-26
Classification: F21W,F21Y,H05B

Abstract:
1. A method of matching an output composite light spectrum to a target light spectrum, the method comprising: providing a light emitting diode (LED) array, the LED array comprising emitters having four or more distinct dominant wavelengths within visible spectrum for generating the output composite light spectrum; and simultaneously minimizing differences between CIE chromaticity coordinates and spectral differences between the target light spectrum and the output composite light spectrum, wherein minimizing the differences between CIE chromaticity coordinates of the target light spectrum and the output composite light spectrum comprises minimizing a chromaticity error, E where x t ,y t , are CIE chromaticity coordinates of the target light spectrum, x o ,y o are CIE chromaticity coordinates of the output composite light spectrum, and W is a weighting factor.