Abstract
We propose a procedure to deconvolute the spectral power distribution (SPD) of
phosphor-converted LEDs (pc-LEDs). The procedure involves a two-step process
using multiple Gaussian functions. The first step is a preliminary process to
deconvolute an SPD using a pair of Gaussian functions. Using the results from
the first step, the second step determines (a) the number of Gaussian
functions to be used in the analysis and (b) the initial values and
regression domains of the coefficients of each Gaussian function
for subsequent multiple-regression
operations. Successful deconvolution is confirmed by comparing the values of
lumen, correlated color temperature, and color rendering index with the
experimental data of cool and warm pc-LEDs. The proposed approach is illustrated
to evaluate the yellow-to-blue ratio and the phosphor power conversion
efficiency.
© 2013 Optical Society of America
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