| 摘要 |
An auto-focus device includes a distance sensor, an actuator, a digital auto-focusing unit, and a controller. The distance sensor is configured for measure an object distance from an object to a lens module. The actuator is configured for drive the lens module to focus on an image sensor. The digital auto-focus unit is configured to process a blur image captured by the image sensor without focusing the lens module on the image sensor to get a sharp image. The controller is configured to activate the actuator when the object distance is shorter than a preset distance or otherwise activate the digital auto-focus unit.
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