Patent ID: 11921349
Assignee: LG INNOTEK CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A lens moving apparatus comprising:
a housing;
a bobbin disposed in the housing;
a magnet disposed on the housing;
a first coil disposed on an outer peripheral surface of the bobbin and configured to move the bobbin in a first direction via an interaction with the magnet;
a second coil configured to generate an induced voltage by an interaction with the first coil for detecting a displacement of the bobbin;
a magnetic member configured to increase an intensity of the induced voltage of the second coil; and
a third coil configured to move the housing via an interaction with the magnet;
wherein the magnetic member is attached to the second coil and the magnetic member is spaced apart from the bobbin and the magnet,
wherein the magnetic member and the second coil are disposed on an outer surface of the housing to suppress influence of the third coil on an output of the second coil, and
wherein the first coil moves together with the bobbin and a distance between the first coil and the second coil varies, and the induced voltage is generated in the second coil based on variation in the distance.