Image capture device with automatic adjusting function for sensitivity
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United States of America Patent
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Apr 28, 2009
Grant Date -
Jul 21, 2005
app pub date -
Jan 12, 2005
filing date -
Jan 16, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
An image capture device includes a light source, an image capture unit, a brightness detector, an object distance obtaining unit which obtains an object distance to the object, first and second controllers, and an amplifier which amplifies an image signal output from the image capture unit by an amplifying factor according to a sensitivity set by one of the first and second controllers. The first controller disables the light source and sets a sensitivity which is in accordance with the brightness of the object and which is lower than a predetermined sensitivity. The second controller enables the light source and sets a sensitivity which is lower than the predetermined sensitivity. The second controller includes a sensitivity obtaining unit which obtains a sensitivity according to the object distance and a maximum amount of light emitted from the light source, and a setting unit which sets the obtained sensitivity.
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