Color stability is of major concern for LED-based products. Currently, much effort is done on lumen maintenance, and for color shift, no agreed method currently exists, be it from testing or from prediction side. To investigate the physics of color shift, we present experiments of each individual part failure of each individual part that are present in LED-based products. In order to develop a color shift prediction method, it is imperative to investigate the color shift contribution by each individual part. We present a new method to predict color shift on a system level, which we named the view factor approach. We compare this prediction method with experiments on luminaire level to conclude that we have taken satisfactory first steps in the field of color shift predictions for LED-based systems.
|Title of host publication||Solid State Lighting Reliability Part 2|
|Subtitle of host publication||Components to Systems|
|Editors||Willem Dirk van Driel, Xuejun Fan, Guo Qi Zhang|
|Place of Publication||Cham|
|Number of pages||19|
|Publication status||Published - 2018|
|Name||Solid State Lighting Technology and Application Series|
|Publisher||Springer International Publishing|
Bibliographical noteGreen Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
- Color shift