Light extraction elements
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United States of America Patent
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Nov 21, 2017
Issued Date -
N/A
app pub date -
Oct 31, 2013
filing date -
Oct 31, 2012
priority date (Note) -
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Abstract
A light guide includes: a first major surface; a second major surface opposite the first major surface; an array of extraction elements, each element disposed between an upper and lower edge of the first major surface, each upper and lower edge defining a plane therebetween, each element including: a first face adjoining the upper edge, the first face projecting inwardly relative to the plane at a first angle; a second face adjoining the first face, the second face projecting inwardly at a second angle relative to the plane, the second angle greater than the first angle; a third face adjoining the lower edge and the second face, the third face projecting inwardly relative to the plane at a third angle, the third angle greater than the first angle; wherein the first face, second face and third face define an indentation projecting inwardly from the plane defined by the first major surface.
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