Effiency and quality by applying light extraction means to the collection portion of a linear luminaire
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United States of America Patent
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Issued Date -
Mar 15, 2012
app pub date -
Aug 23, 2011
filing date -
Aug 23, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Improved side-light distribution systems are disclosed. In one embodiment, an efficient side-light distribution system includes a LED light source; a light coupler for receiving light from the LED light source at a first end and providing light at a second end to an elongated light pipe, and the elongated light pipe receives light from the LED light source at a first end and transmitting the light towards a second end. The coupler transforms at least the angular distribution of at least 70% of the light from the LED light source into an appropriate angular distribution needed for total internal reflection at a second end within the elongated light pipe. The light coupler includes a light-extraction means between the first and second ends of the light coupler for extracting light out of a side of the light coupler. At least part of the light within the light pipe is extracted out of a side of the light pipe, between the first and second ends of the light pipe, by a light-extraction means.
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