Outer suspension type lens shielding mask for projection apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 22, 2007
Grant Date -
Mar 29, 2007
app pub date -
Oct 12, 2006
filing date -
May 24, 2004
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An outer suspension type lens shielding mask for a projection apparatus including a sheet body and holding element, in which a rectangular hole is opened in the sheet body, and the sheet body is combined with the holding element to be fixed on a projection apparatus. Another outer suspension type lens shielding mask includes a base plate, in which a rectangular hole is opened in the middle part thereof, and upper and lower adjustable plates are installed behind the base plate. An open rectangular notch is respectively disposed at the middle parts of the upper and the lower adjustable plates. An adjustment mechanism includes a plurality of connecting elements connected to the base plate and the upper and the lower adjustable plates for adjusting the relative positions thereof, to avoid bad shadows yielded outside of a picture due to light diffraction and improve the quality of visual amusement.
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