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Proceedings Paper

SSL design with LED binning tolerances
Author(s): R. John Koshel
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Paper Abstract

Illumination systems suffer from tolerances like all optical systems, including gross, process, roughness, and system errors. A common system error in solid-state lighting (SSL) luminaires is source variation due to variation within selected LED bins. Tolerances of LED bins include peak or dominant wavelength and flux output. These bin variations lead to chromatic shifts in the resulting illumination distribution when discrete spectral emitters are mixed to provide a desired color. Software tools are developed to provide ease in inspection of color mixing of discrete spectral LEDs taking into account the selected bins for each LED. This tool is a graphical user interface (GUI) of standard LED products from a series of LED manufacturers. Using this tool the color mixing of red, green, and blue LEDs are presented, showing that there is a color shifts in the resulting distribution due to binning variation. Optics that have the potential to alleviate the color shifts due to LED bin tolerances are presented.

Paper Details

Date Published: 24 September 2008
PDF: 12 pages
Proc. SPIE 7103, Illumination Optics, 710303 (24 September 2008); doi: 10.1117/12.801180
Show Author Affiliations
R. John Koshel, Photon Engineering, LLC (United States)
College of Optical Sciences, The Univ. of Arizona (United States)

Published in SPIE Proceedings Vol. 7103:
Illumination Optics
Tina E. Kidger; Stuart R. David, Editor(s)

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