Patent ID: 11892656
Assignee: TDK TAIWAN CORP.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An optical element driving mechanism, driving an optical element having an optical axis, comprising:
a fixed portion;
a movable portion, moving relative to the fixed portion, comprising:
a frame, having a central opening; and
a holder, configured to hold the optical element, disposed in the central opening;

a sensing unit, configured to sense an angle change of the optical element, comprising:
a first sensor, disposed on an inner side of the fixed portion and arranged along a first axis that is perpendicular to the optical axis, configured to sense a rotation of the holder relative to the fixed portion in a second axis that is perpendicular to the optical axis and the first axis;
a second sensor, disposed on the inner side of the fixed portion and arranged along the second axis, configured to sense a rotation of the holder relative to the fixed portion in the first axis;
a third sensor, disposed on a corner of the frame; and
an induction magnet, disposed on a corner of the holder, wherein the third sensor is configured to obtain a third displacement of the induction magnet along a direction that is parallel to the optical axis,
wherein the first sensor, the second sensor, and the third sensor are configured to obtain the angle change of the optical element; and

a driving assembly, configured to drive the movable portion to move relative to the fixed portion and compensate the angle change, comprising:
a first magnetic element;
a first driving coil, configured to correspond to the first magnetic element to drive the holder to rotate around the second axis relative to the fixed portion;
a second magnetic element; and
a second driving coil, configured to correspond to the second magnetic element to drive the holder to rotate around the first axis relative to the fixed portion,

wherein the first axis and the second axis cross the optical axis, and
wherein when view in a direction that is parallel to the optical axis, the first sensor, the second sensor and the third sensor are arranged to form a triangle.