WHITE LIGHT EMITTING DIODE DEVICE
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United States of America Patent
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Issued Date -
May 2, 2013
app pub date -
Mar 28, 2012
filing date -
Oct 27, 2011
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A white light emitting diode device includes a substrate, a plurality of blue LED chips arranged on the substrate, an encapsulation covering the blue LED chips and a yellow phosphor absorbing part of blue light from the blue LED chips and emitting a yellow light. The blue light from the blue LED chips without being absorbed by the yellow phosphor is combined with the yellow light to form a white light. The blue LED chips have different peak wavelengths from each other. Differences between peak wavelengths of any two blue LED chips are no larger than a full width at half maximum of any one of the blue LED chips.
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