Illumination devices and methods of fabrication thereof
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United States of America Patent
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Mar 17, 2015
Grant Date -
Dec 2, 2010
app pub date -
May 27, 2010
filing date -
May 29, 2009
priority date (Note) -
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Abstract
Illumination devices and methods of making same are disclosed. In one embodiment, an illumination apparatus includes a light source, a light guide having a planar first surface, a first end and a second end, and a length therebetween, the light guide positioned to receive light from the light source into the light guide first end, and the light guide configured such that light from the light source provided into the first end of the light guide propagates towards the second end, and a plurality of light turning features that are configured to reflect light propagating towards the second end of the light guide out of the planar first surface of the light guide, each light turning feature having a turning surface and an interferometric stack formed on the turning surface.
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