IMAGE CAPTURING DEVICE AND AUTO-FOCUS METHOD FOR THE SAME
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United States of America Patent
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Issued Date -
Sep 30, 2010
app pub date -
Jul 3, 2009
filing date -
Mar 25, 2009
priority date (Note) -
Abandoned
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Abstract
An image capturing device includes a taking lens, an image sensor, a driving device, an input device, and an auto-focus system. The input device is used for selecting a number of focus areas in a photographing area. The auto-focus system includes an auto-focus module, a calculating module, and a driving module. The auto-focus module controls the image capturing device to focus on each focus area alone to obtain a number of in-focus positions of the taking lens corresponding to the number of focus areas. The calculating module calculates distances between a predetermined starting position of the taking lens and the in-focus positions of the taking lens, and averaging the distances to obtain an average distance. The driving module controls the driving device to move the taking lens the average distance to arrive at an in-focus position of the taking lens corresponding to the plurality of focus areas.
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