US 12,001,076 B2
Lens module, camera module, electronic device, and lens drive method
Kazunori Hasebe, Kanagawa (JP); and Tatsuo Kuroiwa, Kanagawa (JP)
Assigned to SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa (JP)
Appl. No. 17/047,108
Filed by SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa (JP)
PCT Filed Mar. 6, 2019, PCT No. PCT/JP2019/008962
§ 371(c)(1), (2) Date Oct. 13, 2020,
PCT Pub. No. WO2019/207967, PCT Pub. Date Oct. 31, 2019.
Claims priority of application No. 2018-084225 (JP), filed on Apr. 25, 2018.
Prior Publication US 2021/0080685 A1, Mar. 18, 2021
Int. Cl. G02B 7/09 (2021.01); G03B 13/36 (2021.01)
CPC G02B 7/09 (2013.01) [G03B 13/36 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A lens module, comprising:
a lens;
a lens tube, wherein
a central axis of the lens tube is parallel to an optical axis of the lens, and
the lens tube is configured to hold the lens inside;
a casing configured to house the lens tube inside;
a first coil around an outer circumferential surface of the lens tube;
a magnet on an inner circumferential surface of the casing, wherein
the magnet is opposite to the first coil,
the magnet is divided in plurality in a direction of the optical axis, and
the lens tube is configured to move in a direction along the optical axis based on a magnetic interaction between the first coil and the magnet when a current is supplied to the first coil; and
a second coil around the inner circumferential surface of the casing, wherein
the second coil is between the plurality of divided magnets, and
the second coil is configured to detect a position of the lens along the optical axis based on an induced electromotive force generated on the second coil when the current is supplied to the first coil.