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Proceedings Paper

Color reproduction for LED-based general lighting
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Paper Abstract

Solid State Lighting is becoming increasingly more advanced, both in terms of lumen output as well as energy efficiency. However, implementation in color consumer lighting products, such as the Philips Ambilight television sets, still requires improvements in both color reproduction as well as intensity uniformity. To build a lighting system capable of correctly reproducing a large color spectrum, 3 primary colored LEDs are required. However, this approach causes problems. In particular, the generation of a white color without color fringes is difficult to implement, as the total amount of light from each primary color should ideally be identical at each position within the light bundle. Our paper focuses on systems using a limited number of high power LEDs. The lumen output of these LEDs is such that even a single red, green and blue LED together can deliver the required lumen output for certain applications. To optimize performance for both luminance and color uniformity we investigated several design options. Ray tracing simulations are compared to the performance of real size prototypes, and recommendations are given for the design of color lighting systems.

Paper Details

Date Published: 11 September 2006
PDF: 11 pages
Proc. SPIE 6338, Nonimaging Optics and Efficient Illumination Systems III, 63380F (11 September 2006); doi: 10.1117/12.680515
Show Author Affiliations
B. A. Salters, Philips Research Labs. (Netherlands)
M. P. C. M. Krijn, Philips Research Labs. (Netherlands)

Published in SPIE Proceedings Vol. 6338:
Nonimaging Optics and Efficient Illumination Systems III
Roland Winston; Pablo Benítez, Editor(s)

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