Optical loss structure integrated in an illumination apparatus
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United States of America Patent
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Apr 28, 2015
Grant Date -
Feb 4, 2010
app pub date -
Sep 24, 2007
filing date -
Oct 6, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
Various embodiments of a display device described herein include an optical propagation region, at least one optical loss structure, an optical isolation layer, and a plurality of display elements. The propagation region includes a light guide in which light is guided via total internal reflection and turning features configured to redirect the light out of the propagation region. The loss structure would disrupt the total internal reflection of at least some of the light guided within the propagation region if disposed directly adjacent thereto. The optical isolation layer includes a non-gaseous material between the propagation region and the loss structure, and is configured to increase an amount of light that is totally internal reflected in the propagation region. The plurality of display elements are positioned to receive the light redirected out of the propagation region. The loss structure is positioned between the plurality of display elements and the propagation region.
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