Lens driving apparatus, and camera module and optical device including same

A lens moving apparatus comprising:

• a housing;
• a bobbin disposed in the housing;
• a magnet disposed on the housing;
• a first coil disposed on the bobbin, the first coil being moved in an optical-axis direction via interaction with the magnet;
• an elastic member coupled to the bobbin and the housing;
• a second coil, to which a first drive signal is applied, the second coil moving the housing in a direction perpendicular to the optical-axis direction via the interaction with the magnet;
• a position sensor for detecting an intensity of a magnetic field of the magnet depending on movement of the housing;
• and
• a third coil, to which a second drive signal is applied and which is disposed so as to correspond to the position sensor,
• wherein the third coil comprises:
• a first region overlapping the second coil in a first direction;
• and
• a second region not overlapping the second coil in the first direction,
• wherein the first direction is the optical-axis direction.

A lens moving apparatus comprising:

• a housing;
• a bobbin disposed in the housing;
• a magnet disposed on the housing;
• a first coil disposed on the bobbin, the first coil being moved in an optical-axis direction via interaction with the magnet;
• an elastic member coupled to the bobbin and the housing;
• a second coil, to which a first drive signal is applied, the second coil moving the housing in a direction perpendicular to the optical-axis direction via the interaction with the magnet;
• a position sensor for detecting an intensity of a magnetic field of the magnet depending on movement of the housing;
• and
• a third coil, to which a second drive signal is applied and which is disposed so as to correspond to the position sensor,
• wherein the third coil comprises:
• a first wire and a second wire;
• and
• a loop portion connected between the first wire and the second wire and having a loop shape.