LUMINAIRE MODULE HAVING A LIGHT GUIDE WITH A REDIRECTING END-FACE
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United States of America Patent
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Issued Date -
Jan 12, 2017
app pub date -
Jan 26, 2015
filing date -
Feb 24, 2014
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Abstract
A solid-state luminaire module includes one or more light-emitting elements (LEEs) arranged to provide light; and a light guide including a receiving end arranged to receive the light provided by the LEEs and an opposing end, a pair of opposing side surfaces extending along a length of the light guide to guide the received light in a forward direction to the opposing end, and a redirecting end-face located at the opposing end and configured to reflect the guided light—that reaches the opposing end—back into the light guide as return light, such that substantially all the return light impinges on the pair of opposing side surfaces at incident angles larger than a critical incidence angle and transmits through the pair of opposing side surfaces into the ambient as output light of the luminaire module, the output light to propagate in backward directions.
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