Lens moving device, camera module and optical apparatus
AssigneeLG Innotek Co., Ltd.
InventorsJin Suk HAN, In Jae YEO, Jae Hong CHO
Life of this patent
Estimating the term…
Abstract
A lens moving device is provided. The lens moving device includes: a bobbin; a first driving unit coupled to the bobbin; a second driving unit configured to move the first driving unit through an electromagnetic interaction with the first driving unit; a sensing magnet disposed on one side of the bobbin; a location detection sensor configured to sense a location of the sensing magnet; and a correction magnet disposed on an opposite side of the bobbin. According to the present disclosure, static tilt and dynamic tilt of the bobbin, to which a lens module is to be coupled, may be enhanced by a sensing magnet and a correction magnet which establish magnetic force equilibrium with each other.
Claims20
A lens moving device comprising:
- a base;
- a bobbin movably disposed relative to the base;
- a first coil disposed on the bobbin;
- a driving magnet facing the first coil;
- a sensing magnet disposed on the bobbin;
- and
- a location detection sensor configured to sense the sensing magnet,
- wherein, in a first direction perpendicular to an optical axis, the sensing magnet overlaps the location detection sensor and does not overlap the first coil,
- wherein the driving magnet overlaps the first coil in a second direction perpendicular to the optical axis,
- wherein the first coil is disposed between the base and the sensing magnet,
- wherein the sensing magnet is disposed between an upper surface of the bobbin and the first coil,
- wherein the bobbin comprises a recess formed on an outer lateral surface of the bobbin, and
- wherein the sensing magnet is disposed in the recess of the bobbin not to protrude further outward than the outer lateral surface of the bobbin.
A lens moving device comprising:
- a cover member comprising an upper plate and a lateral plate;
- a bobbin disposed in the cover member;
- a first coil disposed on the bobbin;
- a driving magnet facing the first coil;
- a sensing magnet disposed on the bobbin;
- and
- a location detection sensor configured to sense the sensing magnet,
- wherein, in a first direction perpendicular to an optical axis, the sensing magnet overlaps the location detection sensor and does not overlap the first coil,
- wherein the driving magnet overlaps the first coil in a second direction perpendicular to the optical axis,
- wherein the bobbin comprises a recess formed on an outer lateral surface of the bobbin, and
- wherein the sensing magnet is disposed in the recess of the bobbin not to protrude further outward than the outer lateral surface of the bobbin.
A lens moving device comprising:
- a base;
- a bobbin movably disposed relative to the base;
- a first coil disposed on the bobbin;
- a driving magnet facing the first coil;
- a sensing magnet disposed on the bobbin;
- and
- a location detection sensor configured to sense the sensing magnet.
Dependencies are inferred from the claim text.