Diaphragm apparatus for projectors
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United States of America Patent
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Aug 20, 2013
Grant Date -
Sep 15, 2011
app pub date -
Sep 29, 2009
filing date -
Sep 30, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
When a rotation member is rotated clockwise by a stepping motor, one main operation member is rotated counterclockwise through a link member and the other main operation member is rotated clockwise by said main operation member through the link member. Also, one sub operation member is rotated counterclockwise by said main operation member through the link member, and the other sub operation member is rotated clockwise by the other main operation member through the link member. This causes the amount of overlap between a main split blade mounted to said main operation member and a sub split blade mounted to said sub operation member to be increased and also causes the amount of overlap between a main split blade mounted to the other main operation member and a sub split blade mounted to the other sub operation member to be also increased. As a result, the aperture opening formed between the two main split blades is increased.
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