US 12,078,818 B2
Voice coil motor for driving liquid lens and lens assembly having voice coil motor
Taihong Xia, Shenzhen (CN); Chuan Yang, Dongguan (CN); Jianwen Wang, Dongguan (CN); Haixia Jiang, Shanghai (CN); Lei Jiang, Tampere (FI); Dengfeng Li, Dongguan (CN); and Yuandao Ju, Dongguan (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Appl. No. 17/434,661
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
PCT Filed Feb. 21, 2020, PCT No. PCT/CN2020/076126
§ 371(c)(1), (2) Date Aug. 27, 2021,
PCT Pub. No. WO2020/173393, PCT Pub. Date Sep. 3, 2020.
Claims priority of application No. 201910153565.6 (CN), filed on Feb. 28, 2019.
Prior Publication US 2022/0187615 A1, Jun. 16, 2022
Int. Cl. G02B 27/64 (2006.01); G02B 3/14 (2006.01); G02B 26/00 (2006.01); G03B 5/00 (2021.01); G03B 13/36 (2021.01); H02K 11/33 (2016.01); H02K 41/035 (2006.01)
CPC G02B 27/646 (2013.01) [G02B 3/14 (2013.01); G02B 26/004 (2013.01); G03B 5/00 (2013.01); G03B 13/36 (2013.01); H02K 11/33 (2016.01); H02K 41/0356 (2013.01); G03B 2205/0007 (2013.01); H02K 2211/03 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A voice coil motor, comprising:
a plurality of sub motor parts that is capable of being independently controlled, wherein each of the sub motor parts comprises:
an unmovable part comprising:
a motor base part;
a circuit board coupled to the motor base part; and
a coil on the circuit board and electrically coupled to the circuit board;
a movable part capable of moving along an optical axis direction relative to the unmovable part and comprising:
a magnet disposed opposite to the coil; and
a U-shaped separating magnetic piece that forms a magnetic isolation space accommodating the coil and the circuit board, wherein the U-shaped separating magnetic piece comprises:
an inner side wall, wherein the magnet is coupled on the inner side wall; and
an outer side wall;
a driver circuit part configured to control a moving distance of the movable part; and
a connection elastic piece coupled to a liquid lens and the movable part,
wherein the connection elastic piece is a plate spring,
wherein a lower part of the connection elastic piece is fixedly coupled to the outer side wall,
wherein a first stiffness coefficient of the connection elastic piece in the optical axis direction is greater than a second stiffness coefficient of the connection elastic piece in a direction perpendicular to the optical axis direction, and
wherein the movable part is configured to drive the connection elastic piece to squeeze the liquid lens when a force is applied to the movable part in the optical axis direction.