Directional diffuser
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United States of America Patent
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Aug 19, 2003
Grant Date -
Oct 3, 2002
app pub date -
Aug 1, 2001
filing date -
Aug 1, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A diffuser is disclosed which transmits or reflects incident light into a specific range of angles. In a preferred embodiment, this light is uniformly scattered throughout a cone of angles. The diffuser consists of two parts. The first part diffracts or reflects light into a specific offset angle. The second part, in the preferred embodiment, uniformly scatters the light through a range of angles, which is centered on the offset angle. The diffusers have utility in applications such as screens for wrist watches, computers, calculators, and cell phones.
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