Color maintenance prediction for LED-based products
W.D. van Driel (TU Delft - Electrical Engineering, Mathematics and Computer Science, Philips Lighting Research)
J.G.J. Beijer (Philips Lighting Research)
J.W. Bikker (Consultants in Quantitative Methods (CQM))
C.H.M. van Blokland (Consultants in Quantitative Methods (CQM))
C. Ankomah (Consultants in Quantitative Methods (CQM))
B. Jacobs (Philips Lighting Research)
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Abstract
We have seen an increasing number of reported colour maintenance issues in the market when it concerns LED-based products. Besides this, there are also requests to provide products that have < 2 SDCM colour point changes over lifetime. To understand the mechanisms behind colour maintenance in our LED-portfolio we have developed a calculation method that is able to predict colour maintenance as function of time, construction and material used. The details of that method are described in this paper.