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
Original Manuscript: October 8, 2012
Revised Manuscript: December 14, 2012
Manuscript Accepted: December 21, 2012
Published: February 7, 2013
Bong-Min Song and Bongtae Han, "Spectral power distribution deconvolution scheme for phosphor-converted white light-emitting diode using multiple Gaussian functions," Appl. Opt. 52, 1016-1024 (2013)