| 摘要 |
A method for automatically focusing in a photographic module is disclosed. The focus action has two stages. In the first stage, a photographic module and a controller electrically connected to the photographic module are provided. When the lens group of the photographic module is provided at the original position, the controller calculates an automatic focus (AF) evaluation value of the photographic module. Then, the lens group moves twice toward the first direction by a first distance, wherein every time the lens group moves, the controller calculates the AF evaluation value of the photographic module. Afterwards, the controller determines via the difference value between two sequential AF evaluation values and controls the moving direction of the lens group according to the determining result.
|
