Digital camera using a focal-plane shutter
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United States of America Patent
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Mar 22, 2011
Grant Date -
Oct 16, 2008
app pub date -
Oct 1, 2007
filing date -
Oct 2, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A digital camera includes an image pickup device; a focal plane shutter including a shutter leading curtain and a shutter trailing curtain; a timer for measuring exposure time; a shutter controller which commences measurement of an exposure time when the shutter leading curtain starts traveling, and drives the shutter trailing curtain upon completing the exposure time measurement; and a charge readout controller which reads out electric charges accumulated by the image pickup device during the exposure time at least twice, first before the shutter trailing curtain commences traveling upon the shutter leading curtain commencing traveling and second upon the shutter trailing curtain commencing traveling. The charge readout controller carries out the electric charge readout, before the shutter trailing curtain commences traveling, at a scanning speed in synchronization with a travel speed of the shutter leading curtain in a same direction of the traveling shutter leading curtain.
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