Device for controlling multi-axial tilt of camera lens and method therefor

A camera lens multi-axial tilt control device comprising:

• a circular floating plate on which the camera lens assembly is mounted;
• a magnet mounted on the floating plate and mounted at three or more axial points spaced apart a same distance from the center of the optical axis direction (z-axis) of the camera lens;
• an actuator located at a lower portion of each of the magnets;
• Hall sensors facing each of the magnets and detecting a current position of a camera lens movable in an axial direction (z-axis) parallel to the optical axis direction at each axial point;
• servo control units corresponding to each of the Hall sensors and outputting a servo control signal for moving the camera lens to the target position by comparing the current position of the camera lens being detected by the corresponding Hail sensor with the target position;
• and
• actuator driving units corresponding to each of the servo control units and moving the camera lens to a target position in an axial direction parallel to the optical axis direction at each axial point according to a servo control signal being outputted from the corresponding servo control unit, characterized in that
• each of the servo control units controls the movement of the camera lens within a common stroke section among each stroke section in which the camera lens moves in an axial direction (z-axis) parallel to the optical axis direction at each of the three or more points, wherein the camera lens is moved to a target position using a-compensation factors obtained through a linear compensation algorithm for each axis compensated in a way that the lens movement distance per control code is the same.

A camera lens multi-axial tilt control method of a control unit comprising the steps of:

• receiving the current position of the camera lens from a Hall sensor that detects the current position of a camera lens movable in the axial direction (z-axis) parallel to the optical axis direction at each of three or more points spaced apart a same distance from the center of the optical axis direction (z-axis) of the camera lens;
• and
• outputting each of the plurality of servo control signals for moving the camera lens to each target position in the axial direction parallel to the optical axis direction by comparing the current position of the camera lens detected at each of the three or more points with the target position, to different actuator driving units, characterized in that
• each of the plurality of servo control signals is a signal for moving the camera lens within a common stroke section among each stroke section in which the camera lens moves in an axial direction (z-axis) parallel to the optical axis direction at each of the three or more points, and being generated by using compensation factors obtained through a linear compensation algorithm for each axis compensated so that the lens movement distance per control code is the same.