Patent attributes
Provided is a technology which: has a structure that is advantageous for size reduction and power saving; and, moreover, is useful when automatic focusing using a closed-loop control system. A lens driving device comprising: an autofocus driving unit; a Hall element which separates an autofocus magnet section in the optical axis direction and is disposed in a position corresponding to one opposing corner section of the autofocus magnet section and in a manner such that the detection direction matches the optical axis direction; a first position detection magnet which is disposed near the Hall element and in a manner such that the magnetisation direction matches the optical axis direction; and a second position detection magnet which has the same configuration as the first position detection magnet and is disposed in a point symmetrical position relating to the first position detection magnet and the optical axis direction.
