Brightness enhancement film having curved prism units
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United States of America Patent
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Nov 11, 2008
Grant Date -
Oct 27, 2005
app pub date -
Jul 2, 2004
filing date -
Apr 22, 2004
priority date (Note) -
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Abstract
A brightness enhancement film includes a substrate and a plurality of curved prism units. The curved prism units are extended in parallel and mounted to a surface of the substrate. Each of the curved prism units includes at least one meandering surface to provide with changes in curvature. Thus, the meandering surface of the curved prism unit is able to refract incident light in two dimensions with respect to the substrate that may enhance entire refractive efficiency in two dimensions.
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