| 摘要 |
According to an embodiment of the present invention, a lens driving apparatus comprises: a first lens driving unit including a bobbin wherein at least one lens is installed inside and a first coil is installed on the outer circumference surface, and a holder member for supporting a magnet arranged around the bobbin, and for moving the bobbin and the first coil in a first direction parallel with an optical shaft by interaction between the magnet and the first coil; a second lens driving unit including a base at predetermined intervals away from the bobbin and the first lens driving unit, a supporting member for supporting the first lens driving unit in second and third directions with respect to the base to be moved and for providing power for the first coil, and a circuit board having a second coil arranged against the magnet of the first lens driving unit, and a detection sensor for detecting the location in second and third directions of the second lens driving unit with respect to the base, and for moving the entire first lens driving unit including the bobbin in second and third directions different from each other and perpendicular to the optical shaft by interaction between the magnet and the second coil; and a detecting unit for detecting movement in the direction parallel with the optical shaft of the bobbin. The detecting unit includes: a sensing magnet installed on the outer circumference surface of the bobbin; and a location detection sensor arranged on the lateral wall of the cover member, and on the inner surface facing the sensing magnet. The bobbin can further include a compensating magnet installed in an opposite side to the location wherein the sensing magnet is installed. |
