Front projection screens including reflecting and refractive layers of differing spatial frequencies
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United States of America Patent
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Jan 29, 2008
Grant Date -
Jan 18, 2007
app pub date -
Jul 12, 2005
filing date -
Jul 12, 2005
priority date (Note) -
Expired
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Abstract
Projection screens include a substrate, a reflective layer on the substrate and a refractive layer on the substrate. The reflective layer includes reflective microstructures of about 5 .mu.m to about 500 .mu.m in size, and arranged in a first pattern to reflect light at a first spatial frequency. The refractive layer includes refractive microstructures of about 5 .mu.m to about 500 .mu.m in size, and arranged in a second pattern that is different from the first pattern, to refract light at a second spatial frequency that is different than the first spatial frequency. Related fabrication methods also are described.
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