Electronic camera that sets an upper limit of an exposure time during dark image capture
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United States of America Patent
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Sep 25, 2007
Grant Date -
Feb 26, 2004
app pub date -
Jan 27, 2003
filing date -
Jan 28, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
An electronic camera according to the present invention includes: an image-capturing element that outputs image-capturing signals; a shutter device that allows subject light pass through to the image-capturing element or shields the image-capturing element from the subject light; an image-capturing circuit that engages the image-capturing element in an image-capturing operations over a predetermined length of time to output to a first image-capturing signal while the subject light is allowed to pass through to the image-capturing element and also engages the image-capturing element in an image-capturing operation over a predetermined length of time while the image-capturing element is shielded from the subject light; a signal correction circuit that executes a signal correction by subtracting the second image-capturing signal from the first image-capturing signal; and a control circuit that controls the image-capturing circuit so as to set an upper limit to the length of the image-capturing operation executed while the image-capturing element is shielded from the subject light.
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