Single phosphor for creating white light with high luminosity and high CRI in a UV LED device
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United States of America Patent
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Feb 8, 2005
Issued Date -
N/A
app pub date -
Nov 12, 2002
filing date -
Mar 27, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
There is provided a white light illumination system. The illumination system includes a radiation source which emits either ultra-violet (UV) or x-ray radiation. The illumination system also includes a luminescent material which absorbs the UV or x-ray radiation and emits the white light. The luminescent material has composition A.sub.2-2x Na.sub.1+x E.sub.x D.sub.2 V.sub.3 O.sub.12. A may be calcium, barium, strontium, or combinations of these three elements. E may be europium, dysprosium, samarium, thulium, or erbium, or combinations thereof. D may be magnesium or zinc, or combinations thereof. The value of x ranges from 0.01 to 0.3, inclusive.
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