Differential evolution for the optimisation of multi-band white LED light sources

This paper joins the quest for a white-light source based on mixtures of multiple narrow-band light-emitting diodes (LEDs) with the spectrum optimised for high radiant luminous efficacy and good colour-rendering properties. The complexity of the optimisation process increases with the number of LEDs used to create the white-light source. This paper describes an effective approach for mixing narrow-band LED spectra based on differential evolution, a simple and easy to use direct search method. Two MATLAB programs are designed allowing optimisation using the colour-rendering index and colour quality scale systems. Optimal theoretical solutions for four-LED and six-LED mixtures are analysed.

[1]  Gunther Wyszecki,et al.  Color Science: Concepts and Methods, Quantitative Data and Formulae, 2nd Edition , 2000 .

[2]  J. Cohen,et al.  Color Science: Concepts and Methods, Quantitative Data and Formulas , 1968 .

[3]  Rainer Storn,et al.  Differential Evolution – A Simple and Efficient Heuristic for global Optimization over Continuous Spaces , 1997, J. Glob. Optim..

[4]  R. Storn,et al.  Differential Evolution - A simple and efficient adaptive scheme for global optimization over continuous spaces , 2004 .

[5]  R. Berns.  Billmeyer and Saltzman's Principles of Color Technology , 2000 .

[6]  Arpad Bergh,et al.  The Promise and Challenge of Solid-State Lighting , 2001 .

[7]  M. Luo,et al.  CMC 2000 Chromatic Adaptation Transform: CMCCAT2000 , 2002 .

[8]  Lei Deng,et al.  Color rendering properties of LED light sources , 2002, SPIE Optics + Photonics.

[9]  M. Shur,et al.  Optimization of white polychromatic semiconductor lamps , 2002 .

[10]  Y. Ohno.  Simulation Analysis of White LED Spectra and Color Rendering | NIST , 2004 .

[11]  Kevin W. Houser,et al.  A review of colour rendering indices and their application to commercial light sources , 2004 .

[12]  Wendy Davis,et al.  Toward an improved color rendering metric , 2005, SPIE Optics + Photonics.

[13]  N Sándor,et al.  Visual colour rendering based on colour difference evaluations , 2006 .

[14]  Kevin W. Houser,et al.  LEDs for General Illumination: The State of the Science , 2006 .

[15]  Jm Gaines.  Modelling of multichip LED packages for illumination , 2006 .

[16]  Shen Guang-di,et al.  Color rendering and luminous efficacy of trichromatic and tetrachromatic LED-based white LEDs , 2007 .

[17]  Intelligent spectral design and colorimetric parameter analysis for light-emitting diodes , 2007, 2007 14th International Conference on Mechatronics and Machine Vision in Practice.

[18]  F. Viénot,et al.  Testing LED lighting for colour discrimination and colour rendering , 2009 .

[19]  R. Stevenson,et al.  The LED's dark secret , 2009, IEEE Spectrum.

[20]  Guoxing He,et al.  LED white lights with high CRI and high luminous efficacy , 2010, SPIE/COS Photonics Asia.

[21]  Yoshihiro Ohno,et al.  Color quality scale , 2010 .

[22]  Snjezana Soltic,et al.  Towards the Optimum Light Source Spectrum , 2010 .

[23]  S. Soltic,et al.  Influence of Peak Wavelengths on Properties of Mixed-LED White-Light Sources , 2010 .

[24]  Y. Ohno,et al.  Rationale of Color Quality Scale , 2010 .

[25]  A. Razet,et al.  Impact of current supply on LED colour , 2010 .