Large sized rear projection screen
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Nov 9, 2004
Grant Date -
N/A
app pub date -
Dec 18, 2003
filing date -
Oct 18, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rear projection screen does not block the image light and provides a perfect complete image. The screen includes a Fresnel lens, and a cylindrical lens array consisting of a plurality of cylindrical lens elements. These elements are independent from each other and in parallel, and arranged closely between adjacent cylindrical lens element, so that there are no luminous flux loss therebetween. A strengthening area, which is provided with a rigid reinforced member connecting with cylindrical lens elements on two sides thereof, is formed on the are a being from their contact portion to the image-light exist-side surface between adjacent cylindrical lens elements. An ambient light absorbing portion is formed at the image-light exit side in the strengthening area.
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