US 11,796,891 B2
Optical driving mechanism
Fu-Yuan Wu, Taoyuan (TW); and Sin-Jhong Song, Taoyuan (TW)
Assigned to TDK TAIWAN CORP., Taoyuan (TW)
Filed by TDK TAIWAN CORP., Taoyuan (TW)
Filed on Jan. 31, 2020, as Appl. No. 16/778,342.
Claims priority of provisional application 62/799,886, filed on Feb. 1, 2019.
Prior Publication US 2020/0249420 A1, Aug. 6, 2020
Int. Cl. G02B 7/09 (2021.01); G02B 27/64 (2006.01); G03B 9/06 (2021.01); G02B 7/08 (2021.01); G03B 13/36 (2021.01); G03B 5/06 (2021.01); G03B 30/00 (2021.01); H04N 23/57 (2023.01); H04N 23/68 (2023.01)
CPC G03B 9/06 (2013.01) [G02B 7/08 (2013.01); G02B 7/09 (2013.01); G02B 27/646 (2013.01); G03B 5/06 (2013.01); G03B 13/36 (2013.01); G03B 30/00 (2021.01); G03B 2205/0023 (2013.01); G03B 2205/0069 (2013.01); H04N 23/57 (2023.01); H04N 23/687 (2023.01)] 20 Claims
OG exemplary drawing
 
1. An optical driving mechanism, comprising:
a fixed portion;
a movable portion, movably connected to the fixed portion and configured to carry a first optical element;
a drive assembly, configured to drive the movable portion relative to the fixed portion to move within a limited range, wherein the limited range includes a first range and a second range; and
a position sensing assembly, configured to sense the movement of the movable portion relative to the fixed portion, and including:
only one reference element;
a first position sensing element, corresponding to the reference element in the first range; and
a second position sensing element, corresponding to the reference element in the second range, wherein a first position sensing surface of the first position sensing element and a second position sensing surface of the second position sensing element are arranged in a first direction, and both the first position sensing element and the second position sensing element corresponds to the reference element;
wherein the drive assembly includes a magnetic element, and a coil, the magnetic element has an arched shaped structure, and the magnetic element has an opening which faces the position sensing assembly, the magnetic element and the coil correspond to each other, and a gap is between the magnetic element and the coil.