US 12,222,638 B2
Optical element driving mechanism
Chen-Hung Chao, Taoyuan (TW); Yi-Chieh Lin, Taoyuan (TW); Tsung-Han Wu, Taoyuan (TW); and Shou-Jen Liu, Taoyuan (TW)
Assigned to TDK TAIWAN CORP., Taoyuan (TW)
Filed by TDK Taiwan Corp., Taoyuan (TW)
Filed on Dec. 2, 2021, as Appl. No. 17/540,721.
Claims priority of provisional application 63/121,415, filed on Dec. 4, 2020.
Prior Publication US 2022/0182515 A1, Jun. 9, 2022
Int. Cl. G03B 9/40 (2021.01); G01D 5/14 (2006.01); G02B 7/02 (2021.01); G02B 7/09 (2021.01); G02B 26/08 (2006.01); G03B 9/10 (2021.01); H01F 7/08 (2006.01); H01F 7/16 (2006.01); H04N 23/54 (2023.01); H04N 23/55 (2023.01)
CPC G03B 9/40 (2013.01) [G01D 5/14 (2013.01); G02B 7/02 (2013.01); G02B 7/09 (2013.01); G02B 26/08 (2013.01); G03B 9/10 (2013.01); H01F 7/081 (2013.01); H01F 7/16 (2013.01); H04N 23/54 (2023.01); H04N 23/55 (2023.01)] 19 Claims
OG exemplary drawing
 
1. An optical element driving mechanism, comprising:
a movable part, for connecting an optical element;
a fixed part, wherein the movable part is movable relative to the fixed part; and
a driving assembly, for generating a driving force to drive the movable part to move relative to the fixed part,
wherein the driving assembly further comprises a first reinforcement element, for strengthening the driving force,
wherein the driving assembly further comprises:
a driving coil, movable relative to the first reinforcement element;
a first magnetic element, corresponding to the driving coil and fixed relative to the first reinforcement element,
wherein the first reinforcement element comprises a magnetically conductive material,
wherein a first magnetic element surface of the first magnetic element has a planar structure and faces the driving coil,
wherein a first reinforcement portion of the first magnetic element has a plate-like structure and is parallel to the first magnetic element surface,
wherein the driving coil is located between the first magnetic element and the first reinforcement portion when viewed along a first axis that is parallel to the first magnetic element surface,
wherein the driving coil at least partially overlaps the first magnetic element and the first reinforcement portion when viewed along a second axis that is perpendicular to the first magnetic element surface,
wherein a main axis, the first axis and the second axis overlap each other,
wherein when viewed along the main axis, the optical element driving mechanism having a polygonal structure comprises:
a first side, parallel to the first axis;
a second side, parallel to the second axis; and
a first corner, located between the first side and the second side,
wherein the first reinforcement element is located at the first corner when viewed along the main axis.