US 12,237,746 B2
Lens driving device, camera module, and optical apparatus
Jung Cheol Kim, Seoul (KR); and Tae Bong Park, Seoul (KR)
Assigned to LG INNOTEK CO., LTD., Seoul (KR)
Appl. No. 17/628,333
Filed by LG INNOTEK CO., LTD., Seoul (KR)
PCT Filed Aug. 6, 2020, PCT No. PCT/KR2020/010449
§ 371(c)(1), (2) Date Jan. 19, 2022,
PCT Pub. No. WO2021/025511, PCT Pub. Date Feb. 11, 2021.
Claims priority of application No. 10-2019-0095442 (KR), filed on Aug. 6, 2019; application No. 10-2019-0122129 (KR), filed on Oct. 2, 2019; and application No. 10-2019-0134140 (KR), filed on Oct. 25, 2019.
Prior Publication US 2022/0255414 A1, Aug. 11, 2022
Int. Cl. H02K 41/035 (2006.01); G01D 5/14 (2006.01); G02B 27/64 (2006.01); G03B 5/00 (2021.01); G03B 13/36 (2021.01); G03B 30/00 (2021.01); H04N 23/55 (2023.01); H04N 23/54 (2023.01)
CPC H02K 41/0354 (2013.01) [G01D 5/145 (2013.01); G02B 27/646 (2013.01); G03B 5/00 (2013.01); G03B 30/00 (2021.01); H04N 23/55 (2023.01); G03B 2205/0007 (2013.01); G03B 2205/0069 (2013.01); H04N 23/54 (2023.01)] 20 Claims
OG exemplary drawing
 
1. A lens driving device comprising:
a substrate;
a housing disposed on the substrate;
a bobbin disposed in the housing;
a sensing coil disposed on the bobbin;
a first magnet, a second magnet, a third magnet, and a dummy member disposed on different side portions of the housing;
a first coil comprising a first coil unit corresponding to the first magnet and a second coil unit corresponding to the second magnet;
a second coil comprising third to fifth coil units corresponding to the first to third magnets in an optical axis direction; and
a first position sensor disposed on the substrate and configured to sense the sensing coil,
wherein the first magnet and the second magnet are disposed opposite to each other, and the third magnet and the dummy member are disposed opposite to each other,
wherein a long side length of the sensing coil is smaller than a long side length of each of the third to fifth coil units,
wherein a short side length of the sensing coil is smaller than a short side length of each of the third to fifth coil units, and
wherein a length of the sensing coil in the optical axis direction is greater than a length of each of the third to fifth coil units in the optical axis direction.