CAMERA MODULE AND ESTIMATION METHOD OF AUTO FOCUS SEARCH RANGE THEREOF

摘要

A camera module according to the present invention includes: an actuator increasing an electrostatic capacity in response to intensity of applied voltage or current; and an actuator driving unit applying a voltage or a current to the actuator, wherein the actuator driving unit includes a cap sensing unit sensing electrostatic capacity of the actuator, and an auto focusing range setting unit setting up an auto focusing search range of the actuator by using change of electrostatic capacity sensed by the cap sensing unit under an auto focusing search range set-up mode.