Optical element driving mechanism

1 . An optical element driving mechanism, comprising:

a body;

a fixed portion;

a movable portion, being movable relative to the fixed portion; and

a connecting element, connecting the fixed portion to the movable portion, and providing the movable portion with restoring force for moving relative to the fixed portion;

a first driving assembly, driving the movable portion to perform a first motion relative to the fixed portion, disposed on a first side of the body;

a second driving assembly, driving the movable portion to perform a second motion relative to the fixed portion, disposed on the first side;

an optical element, connected to the movable portion, including an incident surface and an emissive surface, wherein the incident surface is orthogonal to the emissive surface; and

a fulcrum element, wherein a position of the fulcrum element is close to a center of mass of the first driving assembly, the second driving assembly, and the movable portion;

wherein the first side is not parallel to the incident surface or the emissive surface;

wherein the connecting element and the fulcrum element do not overlap when viewed along a third direction that is perpendicular to the emissive surface;

wherein the connecting element and the fulcrum element do not overlap when viewed along a second direction that is perpendicular to the incident surface; and

wherein the second direction is perpendicular to the third direction.

2 . The optical element driving mechanism as claimed in claim 1 , wherein the body further comprises:

a second side parallel to the first side;

a third side parallel to the incident surface;

a fourth side parallel to the incident surface, wherein the third side is closer to the incident surface than the fourth side;

a fifth side parallel to the emissive surface; and

a sixth side parallel to the emissive surface, wherein the fifth side is closer to the emissive surface than the sixth side;

wherein the connecting element is located on the sixth side; and

wherein no driving assembly is disposed on the third side, the fourth side, the fifth side, or the sixth side.

3 . The optical element driving mechanism as claimed in claim 2 , wherein the fulcrum element is disposed on the sixth side, serving as a fulcrum for the rotational movement of the movable portion relative to the fixed portion.

4 . The optical element driving mechanism as claimed in claim 2 , wherein the first driving assembly comprises:

a first coil disposed at the fixed portion; and

a first magnetic element, corresponding to the first coil, disposed at the movable portion;

wherein the first coil and the first magnetic element at least partially overlap when viewed in a first direction that is perpendicular to the emissive surface and the incident surface.

5 . The optical element driving mechanism as claimed in claim 4 , wherein the second driving assembly comprises:

a second coil disposed at the fixed portion; and

a second magnetic element, corresponding to the second coil, disposed at the movable portion;

wherein the second coil and the second magnetic element at least partially overlap when viewed in the first direction.

6 . The optical element driving mechanism as claimed in claim 5 , wherein:

the first magnetic element includes an N-pole and an S-pole, arranged in a first pole direction, wherein the first pole direction is parallel to the second direction; and

the second magnetic element includes an N-pole and an S-pole, arranged in a second pole direction, wherein the second pole direction is parallel to a third direction that is perpendicular to the emissive surface.

7 . The optical element driving mechanism as claimed in claim 6 , wherein:

the first motion of the movable portion is a rotational movement around a first axis that is parallel to the first direction; and

the second motion of the movable portion is a rotational movement around a second axis that is parallel to the second direction.

8 . An optical element driving mechanism, comprising:

a body;

a fixed portion;

a movable portion, being movable relative to the fixed portion;

a connecting element, connecting the fixed portion to the movable portion, and providing the movable portion with restoring force for moving relative to the fixed portion;

a first driving assembly, driving the movable portion to perform a first motion relative to the fixed portion, disposed on a first side of the body;

a third driving assembly, driving the movable portion to perform a second motion relative to the fixed portion, disposed on a second side of the body that is parallel to the first side;

an optical element, connected to the movable portion, including an incident surface and an emissive surface, wherein the incident surface is orthogonal to the emissive surface; and

a fulcrum element, wherein a position of the fulcrum element is close to a center of mass of the first driving assembly, the third driving assembly, and the movable portion;

wherein the first side is not parallel to the incident surface or the emissive surface; and

wherein the connecting element and the fulcrum element do not overlap when viewed along a third direction that is perpendicular to the emissive surface;

wherein the connecting element and the fulcrum element do not overlap when viewed along a second direction that is perpendicular to the incident surface; and

wherein the second direction is perpendicular to the third direction.

9 . The optical element driving mechanism as claimed in claim 8 , wherein the third driving assembly comprises:

a third coil disposed at the fixed portion; and

a third magnetic element, corresponding to the third coil, disposed at the movable portion;

wherein the third coil and the third magnetic element at least partially overlap, and the third driving assembly and the first driving assembly do not overlap when viewed in the first direction.

10 . The optical element driving mechanism as claimed in claim 4 , further comprising:

a third driving assembly, driving the movable portion to perform the second motion relative to the fixed portion, disposed on the second side; and

a fourth driving assembly, driving the movable portion to perform the first motion relative to the fixed portion, disposed on the second side.

11 . The optical element driving mechanism as claimed in claim 10 , wherein the third driving assembly comprises:

a third coil disposed at the fixed portion; and

a third magnetic element, corresponding to the third coil, disposed at the movable portion;

wherein the third coil and the third magnetic element at least partially overlap, and the third driving assembly and the second driving assembly at least partially overlap when viewed in the first direction.

12 . The optical element driving mechanism as claimed in claim 11 , wherein the fourth driving assembly comprises:

a fourth coil disposed at the fixed portion; and

a fourth magnetic element, corresponding to the fourth coil, disposed at the movable portion;

wherein the fourth coil and the fourth magnetic element at least partially overlap, and the fourth driving assembly and the first driving assembly at least partially overlap when viewed in the first direction.

13 . The optical element driving mechanism as claimed in claim 12 , wherein each of the first magnetic element, the second magnetic element, the third magnetic element, and the fourth magnetic element includes an N-pole and an S-pole, wherein the N-poles and the S-poles are, in pairs, respectively arranged in a first pole direction, a second pole direction, a third pole direction, and a fourth pole direction; and

wherein the first pole direction is parallel to the fourth pole direction, and the second pole direction is parallel to the third pole direction.

14 . The optical element driving mechanism as claimed in claim 13 , wherein the first pole direction and the fourth pole direction are parallel to a second direction that is perpendicular to the incident surface, and the second pole direction and the third pole direction are parallel to the third direction that is perpendicular to the emissive surface.

15 . The optical element driving mechanism as claimed in claim 12 , further comprising an optical axis that is perpendicular to the incident surface;

wherein the first driving assembly and the fourth driving assembly are disposed symmetrically about the optical axis, and the second driving assembly and the third driving assembly are also disposed symmetrically about the optical axis.

16 . The optical element driving mechanism as claimed in claim 12 , further comprising:

a first sensing element, corresponding to the first magnetic element, disposed at the fixed portion, located on the first side;

a second sensing element, corresponding to the second magnetic element or the third magnetic element, disposed at the fixed portion, located on the first side or the second side; and

a third sensing element, corresponding to the fourth magnetic element, disposed at the fixed portion, located on the second side.

17 . The optical element driving mechanism as claimed in claim 16 , further comprising an optical axis that is perpendicular to the incident surface;

wherein the first sensing element and the third sensing element are disposed symmetrically about the optical axis.

18 . The optical element driving mechanism as claimed in claim 17 , wherein the second sensing element at least partially overlaps the first sensing element or the third sensing element when viewed in a direction that is perpendicular to the optical axis.

19 . The optical element driving mechanism as claimed in claim 12 , wherein the first magnetic element and the second magnetic element do not overlap, and the third magnetic element and the fourth magnetic element do not overlap when viewed in the first direction.

20 . The optical element driving mechanism as claimed in claim 19 , wherein the first magnetic element, the second magnetic element, the third magnetic element, and the fourth magnetic element do not overlap each other when viewed in a second direction that is perpendicular to the first direction.