Light emitting devices and systems having tunable chromaticity and methods of tuning the chromaticity of light emitting devices and systems
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United States of America Patent
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Jun 3, 2014
Grant Date -
Apr 4, 2013
app pub date -
Nov 21, 2012
filing date -
Feb 19, 2009
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Abstract
A light emitting device package assembly includes a light emitting device package body, and first, second and third white light emitting devices on the package body, each of the first, second and third white light emitting devices emits light when energized having a chromaticity that falls within a respective one of first, second and third non-overlapping chromaticity regions in a two dimensional chromaticity space. The first, second and third chromaticity regions are spaced apart in the two dimensional chromaticity space by respective regions having at least the size of a seven step MacAdam ellipse. Related solid state luminaires and methods are also disclosed.
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