IMAGE CAPTURING DEVICE AND AUTO-FOCUS METHOD THEREOF

摘要

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.

主权项

1. An auto-focus method, adapted to an image capturing device comprising a distance sensor and an image sensor having a lens and a sensing array, comprising the following steps:
obtaining distance sensor data (DS data) and phase detection data (PD data) respectively from the distance sensor and the sensing array; controlling the lens to perform a course search in a focusing range by switching the image sensor between a distance sensor auto-focus (DSAF) mode and a phase detection auto-focus (PDAF) mode based on the DS data and the PD data so as to determine a fine-search range; controlling the lens to perform a fine search within the fine-search range in a contrast detection auto-focus (CDAF) mode so as to determine an optimal focusing lens position; and controlling the lens to move to the optimal focusing lens position.