US 12,253,739 B2
Lens driving apparatus and camera module comprising same
Young Bae Jang, Seoul (KR)
Assigned to LG INNOTEK CO., LTD., Seoul (KR)
Appl. No. 16/982,189
Filed by LG INNOTEK CO., LTD., Seoul (KR)
PCT Filed Apr. 10, 2019, PCT No. PCT/KR2019/004278
§ 371(c)(1), (2) Date Sep. 18, 2020,
PCT Pub. No. WO2019/199054, PCT Pub. Date Oct. 17, 2019.
Claims priority of application No. 10-2018-0042061 (KR), filed on Apr. 11, 2018.
Prior Publication US 2021/0026098 A1, Jan. 28, 2021
Int. Cl. G02B 7/09 (2021.01); G02B 7/02 (2021.01); G02B 27/64 (2006.01); G03B 5/00 (2021.01); G03B 13/36 (2021.01)
CPC G02B 7/09 (2013.01) [G02B 7/021 (2013.01); G02B 27/646 (2013.01); G03B 5/00 (2013.01); G03B 13/36 (2013.01); G03B 2205/0007 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A lens driving device comprising:
a base comprising a hole;
a first bobbin disposed in the base;
a second bobbin disposed in the base and spaced apart from the first bobbin;
a first coil disposed on the first bobbin;
a second coil disposed on the second bobbin;
a driving magnet fixed to the base and facing the first coil and the second coil;
a first flexible printed circuit board comprising one end electrically connected to the first coil and an other end passing through the hole of the base;
a second flexible printed circuit board comprising one end electrically connected to the second coil and an other end passing through the hole of the base;
a control unit, disposed on the first flexible printed circuit board and the second flexible printed circuit board, the control unit being configured to individually control direction, intensity, and amplitude of a current supplied to the first coil, the second coil or the driving magnet; and
a first position detection sensor and a second position detection sensor, disposed on the first flexible printed circuit board and the second flexible printed circuit board, respectively, the first position detection sensor being configured to detect an amount of movement in an optical axis direction of the first bobbin in real time and the second position detection sensor being configured to detect an amount of movement in the optical axis direction of the second bobbin in real time, and the first position detection sensor and the second position detection sensor each being configured to send the respective detected values to the control unit,
wherein the control unit is further configured to determine whether to perform an additional movement for the first bobbin and the second bobbin through the detected values,
wherein the first flexible printed circuit board comprises a first connection portion formed to be extended from the one end of the first flexible printed circuit board, and a second connection portion formed to be extended from the other end of the first flexible printed circuit board,
wherein the second flexible printed circuit board comprises a third connection portion formed to be extended from the one end of the second flexible printed circuit board, and a fourth connection portion formed to be extended from the other end of the second flexible printed circuit board,
wherein an angle formed by the first connection portion and the second connection portion and an angle formed by the third connection portion and the fourth connection portion changes according to the movement of the first bobbin and the second bobbin, and
wherein, in the optical axis direction, a length of the driving magnet is greater than a sum of a length of the first bobbin and a length of the second bobbin.