Multichip on-board LED illumination device
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United States of America Patent
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Jun 12, 2012
Grant Date -
Mar 26, 2009
app pub date -
Dec 5, 2008
filing date -
Oct 21, 2005
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Abstract
An LED-based illumination device can use an array of four LEDs to produce high intensity light over a broad color spectrum and a broad range of color temperature. A high quality white light can be produced by using two green LEDs with a single red and a single blue LED.
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