Exposure controller of a digital camera
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United States of America Patent
Stats
-
Jan 4, 2005
Grant Date -
N/A
app pub date -
Jul 14, 2000
filing date -
Jul 16, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An exposure controller of a digital camera, using an image pick-up device, includes a photometering sensor, and a control device. The control device calculates a first exposure time in accordance with a photometering value obtained via the photometering sensor, and performs a pre-exposure in which a sensitive surface of the image pick-up device is exposed at a second exposure time shorter than the first exposure time. Thereafter, the control device performs a main exposure in which the sensitive surface of the image pick-up device is exposed at a third exposure time obtained by changing the value of one of the first exposure time and the second exposure time in accordance with a picture signal output from the image pick-up device, the picture signal being output when the image pick-up device is exposed at the second exposure time by the pre-exposure.
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