CAMERA SYSTEM WITH AUTO-FOCUS FUNCTION AND CONTROL METHOD THEREOF

摘要

In accordance with an aspect of the present invention a camera system comprising a lens module capable of linear movement in a direction of an optical axis; a drive portion generating for driving force to move said the lens module; a position sensor portion outputting a electrical signal to detect a position of the lens module; a image sensor portion outputting a electrical signal to capture image of a subject through the lens module; a control portion controlling the magnitude of driving force as the result that is judged by discriminating correct position to focus position of the lens module compared to real output and standard output of the position sensor corresponding to focus position of the subject to be detected as to output of the image sensor portion, wherein the control portion is composed of one chip.