Lens driving apparatus, and camera module and optical device including same
AssigneeLG Innotek Co., Ltd.
InventorsJun Taek Lee, Kap Jin Lee
Life of this patent
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Abstract
A lens driving device having a housing, a bobbin disposed in the housing, a first coil disposed on an outer surface of the bobbin, a first magnet disposed on the housing, a second magnet disposed on the bobbin, and a first position sensor disposed opposite to the second magnet in order to sense the second magnet. The bobbin has a first seating groove. The second magnet is disposed in the first seating groove. A lower portion of the second magnet overlaps with the first coil in a direction perpendicular to an optical axis. The lower portion of the second magnet is disposed between the first coil and the housing.
Claims20
A lens driving device comprising:
- a housing;
- a bobbin disposed in the housing;
- a first coil disposed on an outer surface of the bobbin;
- a first magnet disposed on the housing;
- a second magnet disposed on the bobbin;
- and
- a first position sensor disposed opposite to the second magnet to sense the second magnet,
- wherein the second magnet comprises:
- a first portion overlapped with the first coil in a direction perpendicular to an optical axis;
- and
- a second portion disposed on the first portion and not overlapped with the first coil in the direction perpendicular to the optical axis, and
- wherein a length of the second portion of the second magnet in a direction parallel to the optical axis is greater than a length of the first portion of the second magnet in the direction parallel to the optical axis.
A lens driving device comprising:
- a housing;
- a bobbin disposed in the housing;
- a first coil disposed on an outer surface of the bobbin;
- a first magnet disposed on the housing;
- a second magnet disposed on the bobbin;
- a first position sensor disposed opposite to the second magnet to sense the second magnet;
- and
- a third magnet disposed on the bobbin and disposed at a position opposite to the second magnet with respect to an optical axis,
- wherein the third magnet comprises a portion overlapped with the first coil in a direction perpendicular to the optical axis,
- wherein the second magnet comprises:
- a first portion overlapped with the first coil in the direction perpendicular to the optical axis;
- and
- a second portion disposed on the first portion and not overlapped with the first coil in the direction perpendicular to the optical axis, and
- wherein a length of the second portion of the second magnet in a direction parallel to the optical axis is greater than a length of the first portion of the second magnet in the direction parallel to the optical axis.
Dependencies are inferred from the claim text.