LIGHT EMITTING DEVICE WITH PHOSPHOR WAVELENGTH CONVERSION
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United States of America Patent
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Issued Date -
Jan 23, 2014
app pub date -
Mar 4, 2013
filing date -
Dec 31, 2008
priority date (Note) -
Abandoned
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Abstract
A light emitting device comprises: a thermally conductive substrate (MCPCB); at least one LED mounted in thermal communication with a surface of the substrate; a housing attached to the substrate and configured such the housing and substrate together define a volume that totally encloses the at least one LED, the housing comprising at least a part that is light transmissive (window); and at least one phosphor material provided on an inner surface of the housing within said volume said phosphor being operable to absorb at least a part of the excitation light emitted by the at least one light emitting diode and to emit light of a second wavelength range. The housing is attached to the substrate such that the volume is substantially water tight, preferably air/gas tight.
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