Illumination unit having at least two solid state light sources in the same wavelength band
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United States of America Patent
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Nov 18, 2014
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app pub date -
Oct 26, 2011
filing date -
Nov 29, 2010
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Abstract
An illumination unit includes a plurality of light sources each including a solid-state light-emitting device configured to emit light from a light emission region including a single or a plurality of light-emitting spots. The solid-state light-emitting device includes a single chip or a plurality of chips each emitting light beam. Three or more of the light-emitting spots are provided within the whole light sources, to allow the whole light sources to emit light beams in two or more wavelength bands different from one another. Two or more of the plurality of the light sources include respective light-emitting spots which emit light in the same wavelength band.
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