Polarized LED
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United States of America Patent
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Issued Date -
May 4, 2006
app pub date -
Oct 29, 2004
filing date -
Oct 29, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A solid state light source includes an LED die that generates light of two polarization states. A medium is provided at or near an emitting surface of the LED die that preferentially reflects one polarization state back into the LED die and preferentially transmits the other polarization state out of the LED die, thus providing a solid state light source whose light output is at least partially polarized. Recycling of light within the LED die together with polarization conversion mechanisms can enhance efficiency and brightness of the polarized output.
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