Method and apparatus for measuring spectral content of LED light source and control thereof
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United States of America Patent
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Sep 10, 2002
Grant Date -
N/A
app pub date -
Apr 27, 2000
filing date -
Apr 27, 2000
priority date (Note) -
In Force
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Abstract
Solid state illumination using closed loop spectral control. Light emitting diodes producing different colors are mounted in close proximity to photosensors. Spectral content of the light emitting diodes is measured by the photosensors, and these measurements used to adjust light emitting diode currents to achieve the desired spectral characteristics.
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