Illumination devices comprising white light emitting diodes and diode arrays and method and apparatus for making them
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United States of America Patent
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Jan 2, 2007
Grant Date -
Oct 13, 2005
app pub date -
Apr 9, 2004
filing date -
Apr 9, 2004
priority date (Note) -
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Abstract
In accordance with the invention, an illumination device comprises a substrate having a surface and a cavity in the surface. At least one light emitting diode ('LED') is mounted within the cavity, and a monolayer comprising phosphor particles overlies the LED. The phosphor monolayer is adhered to the LED by a monolayer of transparent adhesive material. An optional optical thick layer of transparent material overlies the phosphor monolayer to encapsulate the LED and optionally to form a lens. Methods and apparatus for efficiently making the devices are disclosed.
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