Brightness enhancement film with soft cutoff
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United States of America Patent
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Jun 29, 1999
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N/A
app pub date -
Feb 5, 1996
filing date -
Feb 5, 1996
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Abstract
A brightness enhancement film has a plurality of linear prisms. The prisms are disposed in pairs, each pair having first and second prisms and each prism has a prism angle and a valley angle. Either the prism angles or the valley angles, but not both, are equal.
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