The quality of light emitted by lighting systems based on high brightness LEDs is studied using colorimetric parameters (chromaticity coordinates, correlated colour temperature and colour rendering index) when operating with different forms of electrical power supply (continuous and pulsed current). Uncertainties, calculated by Monte Carlo simulations applied to relative spectral measurements and colorimetric parameters are presented.
Get full access to this article
View all access options for this article.
References
1.
Organisation for Economic Co-operation and Development - International Energy Agency (OECD/IEA).Light’s Labour’s Lost: Policies for Energy-efficient Lighting. Paris: IEA, 2006.
2.
Alliance for Solid-State Illumination Systems and Technologies (ASSIST).LED Life for General Lighting: Recommendations for the Definition and Specification of Useful Life for Light Emitting Diode Light Sources. Troy, NY: Lighting Research Center, 2006.
3.
Nakamura S., Senoh M., Mukai T.P-GaN/nInGaN/n-GaN double heterostructure blue light emitting diodes. Japanese Journal of Applied Physics1993; 32: L8-L11.
4.
Nakamura S., Senoh M., Mukai T.High power InGaN/GaN double heterostructure violet light emitting diodes. Applied Physics Letters1993; 62: 2390-2392.
5.
Nakamura S., Mukai T., Senoh M.Candela class high brightness InGaN/AlGaN double heterostructure blue light emitting diodes. Applied Physics Letters1994 ; 64: 1687-1689.
6.
Bipm, Iec, Ifcc, Iso, Iupac, Iupap, Oiml.Evaluation of measurement data - Supplement 1 to the ‘Guide to the expression of uncertainty in measurement’ - Propagation of distributions using a Monte Carlo method, 2008 .
7.
Pousset N., Obein G., Razet A.Visual experiment on LED lighting quality with color quality scale colored samples: Proceedings of CIE 2010: ‘Lighting Quality and Energy Efficiency’. Vienna: CIE.
8.
Pousset N., Rougié B., Razet A.Uncertainty evaluation for measurement of LED colour by Monte Carlo simulations . Metrologia2009; 46: 704-718; Corrigendum 2010; 47: 112.
9.
Pousset N.Caractérisation du rendu des couleurs des diodes électroluminescentes . PhD thesis. Paris: Conservatoire National des Arts et Metiers, 2009.
10.
Commission Internationale de l’Eclairage. Colorimetry, CIE Publication 015, 3rd Edition. Vienna: CIE, 2004.
11.
McCamy CSCorrelated color temperature as an explicit function of chromaticity coordinates. Color Research and Application1992; 17: 142-144. Errata . Color Research and Application, 1993; 18: 150.
12.
Commission Internationale de l’Eclairage.Method of Measuring and Specifying Colour Rendering Properties of Light Sources. CIE Publication13.3, Vienna: CIE, 1995.
13.
Pousset N., Razet A., Obein G., Richard A., Bastie J.Metrology of light emitting diodes: Proceedings of the 13th International Congress of Metrology, Lille , France, 2007.
14.
Dyble M., Narendran N., Bierman A., Klein T.Impact of dimming white LEDs: Chromaticity shifts due to different dimming method: Proceedings of 5th International Conference on Solid State Lighting, San Diego, USA, 2005.
15.
Gu Y., Narendran N., Dong T., Wu H.Spectral and luminous efficacy change of high power LEDs under different dimming methods: Proceedings of 6th International Conference on Solid State Lighting, San Diego, USA, 2006.
