ILLUMINATION DEVICE WITH HUE TRANSFORMATION
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United States of America Patent
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Issued Date -
Jun 14, 2007
app pub date -
Dec 13, 2006
filing date -
Dec 13, 2005
priority date (Note) -
Abandoned
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Abstract
An illumination device includes a first light source, a second light source, and a light-diffusing medium. The first light source emits light of a first hue, and the second light source emits light of a second hue. The light-diffusing medium receives light emitted from the first and second light sources. The light-diffusing medium is composed of a light-transmitting material and a light color-converting material. The light color-converting material is selected to convert the light of a first hue into a light of a third hue, and to pass the light of the second hue with substantially no conversion. The light-diffusing medium thus emits light of a perceived hue that is a combination of the light of the third hue and the light of the second hue. By adjusting the relative intensities of the light emitted by the first and second light sources, the perceived hue can be readily transformed or tuned.
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