Projection screen
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United States of America Patent
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-
Aug 17, 2010
Grant Date -
Jul 23, 2009
app pub date -
Aug 15, 2008
filing date -
Jan 23, 2008
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A projection screen is disclosed, which includes an upper housing, an upper roller, a reflecting curtain, a lower housing, a lower roller, a lower mask and a positioning assembly. The upper roller is pivoted in the upper housing. The reflecting curtain is wound on the upper roller and has a reflecting surface to form a projection area. The lower housing is fixed at a free end of the reflecting curtain. The lower roller is pivoted in the lower housing. The lower mask is wound on the lower roller. The positioning assembly detachably connects a free end of the lower mask to the reflecting curtain, so that the lower mask covers a portion of the reflecting surface of the reflecting curtain to define the boundary of the projection area.
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