US 12,436,358 B2
Lens actuator and a camera module including the same
Young Bae Jang, Seoul (KR)
Assigned to LG INNOTEK CO., LTD., Seoul (KR)
Appl. No. 17/265,064
Filed by LG INNOTEK CO., LTD., Seoul (KR)
PCT Filed Jul. 31, 2019, PCT No. PCT/KR2019/009567
§ 371(c)(1), (2) Date Feb. 1, 2021,
PCT Pub. No. WO2020/027588, PCT Pub. Date Feb. 6, 2020.
Claims priority of application No. 10-2018-0090338 (KR), filed on Aug. 2, 2018.
Prior Publication US 2021/0302687 A1, Sep. 30, 2021
Int. Cl. G02B 7/04 (2021.01); G02B 13/00 (2006.01)
CPC G02B 7/04 (2013.01) [G02B 13/009 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A lens actuator, comprising:
a base;
a first guide rail disposed within the base;
a second guide rail disposed within the base;
a first lens assembly configured to move in an optical axis direction along the first guide rail;
a second lens assembly configure to move in the optical axis direction along the second guide rail;
a first magnet disposed on one side of the first lens assembly;
a first coil unit spaced apart from the first magnet and disposed within the base; and
a first ball disposed between the first lens assembly and the first guide rail,
wherein the first guide rail includes a first guide recess configured to accommodate the first ball and a first stopper at an end of the first guide recess configured to limit movement of the first lens assembly,
wherein the first guide recess is configured to extend parallel to the optical axis,
wherein a length of the first guide recess along the optical axis direction is greater than a length of the first lens assembly,
wherein the first and second lens assemblies are sequentially arranged in the optical axis direction, and
wherein the first guide rail and the second guide rail are diagonally disposed within the base with respect to the optical axis.