Light directing film having variable height structured surface and light directing article constructed therefrom
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United States of America Patent
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Jun 23, 1998
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N/A
app pub date -
Apr 3, 1997
filing date -
Mar 3, 1995
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Abstract
A light directing film including a first surface and a second structured surface. The structured surface includes a repeating pattern of prism zones including at least a first zone having a plurality of prism elements with peaks disposed at a first distance from a reference plane and a second zone having a plurality of prism elements with peaks disposed less than the first distance from a reference plane. The width of the first zone preferably measures less than about 300 microns.
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