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Proceedings Paper

Effects on illumination uniformity due to dilution on arrays of LEDs
Author(s): Ivan Moreno; Roumen I. Tzonchev
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Paper Abstract

Light sources consisting of multiple Light-Emitting Diodes (LEDs) are becoming the preferred choice for many lighting applications that require uniform illumination distribution. However, packaging density of LED arrays is limited by cost, available space, and particularly by thermal problems. Therefore low density or diluted arrays of LEDs are becoming the option for many applications. This paper presents an investigation of the effects on illumination uniformity due to dilution on light sources consisting of multiple LEDs. The characteristics of illumination uniformity are obtained for several diluted-array configurations and degrees of dilution. This analysis is performed using a radiometric analysis, and considering each LED as an imperfect Lambertian emitter. Analytical expressions are derived for the maximum degree of dilution for different configurations of LED arrays.

Paper Details

Date Published: 29 September 2004
PDF: 8 pages
Proc. SPIE 5529, Nonimaging Optics and Efficient Illumination Systems, (29 September 2004); doi: 10.1117/12.560126
Show Author Affiliations
Ivan Moreno, Univ. Autonoma de Zacatecas (Mexico)
Roumen I. Tzonchev, Univ. Autonoma de Zacatecas (Mexico)


Published in SPIE Proceedings Vol. 5529:
Nonimaging Optics and Efficient Illumination Systems
Roland Winston; R. John Koshel, Editor(s)

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