Variable Color Illumination Apparatus
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United States of America Patent
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Issued Date -
Apr 17, 2008
app pub date -
Jan 20, 2006
filing date -
Jan 20, 2005
priority date (Note) -
Abandoned
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Abstract
To provide a variable color illumination apparatus enabling illumination with a suitable colors even when characteristics change in accordance with aging or other aspects of the environment and having a reproducibility of colors stable for a long period. The variable color illumination apparatus has light sources (15) of at least two colors, a control device (30) for independently performing light adjustments of the respective light sources (15), one light receiving device (83) for detecting light emission amounts of light sources (15), a memory device (71) storing light quantity ratios of the respective light sources (15) preset for obtaining desired light colors, and a central processing unit (50) for finding changes between light quantity ratios of the respective light sources (15) detected at the light receiving device (83) and preset light quantity ratios and outputting the changes as correction outputs to the control device (30).
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