Image capturing device and hybrid auto-focus method thereof
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United States of America Patent
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Jan 9, 2018
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Jun 21, 2016
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Jul 13, 2015
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Abstract
The disclosure proposes an auto-focus method and an image capturing device including a distance sensor and an image sensor having a lens and a sensing array. The method includes the following steps. First, distance sensor data and phase detection data are respectively obtained from the distance sensor and the sensing array. The lens is controlled to perform a course search within a focusing range by switching between a distance sensor auto-focus mode and a phase detection auto-focus mode based on the distance sensor data and the phase detection data so as to determine a fine-search range. The lens is further controlled to perform a fine search within the fine-search range in a contrast detection auto-focus mode so as to determine an optimal focusing lens position. Next, the lens is controlled to move to the optimal focusing lens position.
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