Method for producing a plurality of LED illumination devices and a plurality of LED chipsets for illumination devices, and LED illumination device
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United States of America Patent
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Aug 25, 2015
Grant Date -
Dec 1, 2011
app pub date -
Dec 18, 2009
filing date -
Dec 19, 2008
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Abstract
A method for producing a plurality of LED illumination devices which each emit light having an average value of a first photometric parameter including producing a plurality of LED chips which emit light of the same color; measuring values of the first photometric parameter of the LED chips; combining the LED chips to form groups of at least two LED chips which have different values of the first photometric parameter such that differences in the average values of all the LED illumination devices are imperceptible to the human eye; and equipping a respective LED illumination device with a group of LED chips.
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