Light turning device with prismatic light turning features
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United States of America Patent
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Jan 22, 2013
Grant Date -
Mar 4, 2010
app pub date -
Sep 1, 2009
filing date -
Sep 2, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A light guide device includes a light guide body and two or more pluralities of spaced-apart slits. The slits are formed by undercuts in the light guide body. Sidewalls of the slits form facets that redirect light impinging on the facets. In some embodiments, the light guide body is attached to a light source. The light source emits light that is injected into the light guide body and the slits redirect the light out of the light guide body and towards a desired target. In some embodiments, the target is a display and a first plurality of slits directs light from the light source across the light guide body and over the face of the display. A second plurality of slits then directs light out of the light guide body and towards the display.
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