Light guide films having reduced banding levels
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United States of America Patent
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Dec 24, 2013
Grant Date -
Jun 13, 2013
app pub date -
Dec 9, 2011
filing date -
Dec 9, 2011
priority date (Note) -
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Abstract
The present invention provides a light guide plate comprising an input surface for receiving light from a light source, an output surface for emitting light, and a bottom surface opposing to the output surface, wherein at least one of the output surface and the bottom surface has a micro-pattern, the micro-pattern comprising a plurality of micro-lenses. The light guide plate further comprises micro-lens having a width w, a length l, a depth d, an orientation angle, a first base angle α1, a second base angle α2, a first entry angle β1, and a second entry angle β2 such that when depth change Δd is 0.1 μm, area change ratio, defined as
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