Light-redirecting optical structures
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United States of America Patent
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Feb 12, 2008
Grant Date -
Dec 9, 2004
app pub date -
Apr 23, 2004
filing date -
May 2, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
A plurality of microstructures is provided, with each microstructure having at least a first side and at least a second side terminating at a peak. At least some of the peaks can include an elevated portion to space the peaks away from adjacent optical sheets, surfaces, films, substrates, or other layers to minimize wet-out, Newton's rings, abrasions, moire fringes, or other undesirable optical conditions. In other embodiments, an optical film is also provided that includes a first plurality of microstructures having a base, a first side, and a second side, and a second plurality of microstructures having a base, a first side, and a second side, the first side including a first planar surface, and the second side including a second planar surface and a third planar surface.
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