Optical member driving mechanism

1. An optical member driving mechanism, comprising:

a first movable portion, configured to connect an optical member, wherein light enters the optical member from an incident surface of the optical member along an incident direction;

a fixed portion, wherein the first movable portion can move relative to the fixed portion;

a first driving assembly, configured to drive the first movable portion to move relative to the fixed portion and comprising a pair of coils, wherein a winding axis of each of the coils is parallel to the incident direction;

a guiding slot, having an arc structure and formed on a surface of the fixed portion that is parallel to the incident surface; and

at least three guiding elements, disposed between the coils and engaged with the guiding slot, wherein the guiding elements are separated from each other, and the coils and the guiding elements are disposed on a same side of the first movable portion,

wherein as seen from the incident direction, the first movable portion has a plurality of depressions for accommodating the guiding elements, and dimensions of each of the depressions are substantially the same as dimensions of each of the guiding elements.

2. The optical member driving mechanism as claimed in claim 1 , wherein the optical member is configured to adjust an emission direction of light from the incident direction to an outgoing direction, and the first driving assembly is configured to drive the first movable portion to rotate around a first rotation axis relative to the fixed portion, wherein the incident direction is not parallel to the outgoing direction, and the first rotation axis is parallel or perpendicular to the incident direction.

3. The optical member driving mechanism as claimed in claim 2 , wherein the optical member driving mechanism further comprises:

a second movable portion; and

a second driving assembly, configured to drive the second movable portion to move relative to the first movable portion and the fixed portion, wherein at least a portion of the first driving assembly is disposed on the first movable portion, and at least a portion of the second driving assembly is disposed on the second movable portion.

4. The optical member driving mechanism as claimed in claim 3 , wherein the optical member driving mechanism further comprises an elastic member, connecting the first movable portion to the second movable portion.

5. The optical member driving mechanism as claimed in claim 4 , wherein the fixed portion comprises a base and a housing having a top wall, the first movable portion has an upper surface facing the top wall, and the second movable portion has a lower surface facing the base, wherein the elastic member is connected to the upper surface and the lower surface.

6. The optical member driving mechanism as claimed in claim 2 , wherein the first driving assembly further comprises a pair of magnets, the magnets and the coils are respectively disposed on the first movable portion and the fixed portion, and the optical member driving mechanism further comprises a plurality of wires embedded in the fixed portion, wherein the wires are magnetic, and at least a portion of the wires correspond to the magnet.

7. The optical member driving mechanism as claimed in claim 2 , wherein the first driving assembly further comprises a pair of magnets, the magnets and the coils are respectively disposed on the first movable portion and the fixed portion, and the optical member driving mechanism further comprises a magnetic permeability member disposed on the fixed portion and corresponding to the magnet.

8. The optical member driving mechanism as claimed in claim 2 , wherein the guiding elements are disposed on the first movable portion and movably connected to the guiding slot.

9. The optical member driving mechanism as claimed in claim 8 , wherein the guiding elements are balls.

10. The optical member driving mechanism as claimed in claim 9 , wherein the depressions are separated from each other, and the balls are accommodated in the depressions.

11. The optical member driving mechanism as claimed in claim 2 , wherein the fixed portion comprises a base and a housing having a top wall, wherein in the incident direction, a shortest distance between the first movable portion and the top wall is a first distance, a shortest distance between the second movable portion and the top wall is a third distance, and the first distance is different from the third distance.

12. The optical member driving mechanism as claimed in claim 11 , wherein the first distance is less than the third distance.

13. The optical member driving mechanism as claimed in claim 2 , wherein the optical member driving mechanism further comprises a shield member, disposed on an edge of the optical member.

14. The optical member driving mechanism as claimed in claim 1 , wherein a center of the arc structure is aligned with a center of the optical member as seen from the incident direction.

15. The optical member driving mechanism as claimed in claim 1 , wherein the guiding elements are pillars that are disposed on the fixed portion, and the pillars protrude from a surface of the fixed portion facing the second movable portion.

16. The optical member driving mechanism as claimed in claim 15 , wherein the fixed portion further comprises a plurality of receiving recesses, formed on the surface and surrounding the pillars.

17. The optical member driving mechanism as claimed in claim 15 , wherein the guiding slot has an arc structure.

18. The optical member driving mechanism as claimed in claim 17 , wherein the center of the arc structure is aligned with the center of the optical member as seen from the incident direction.

19. An optical member driving mechanism, comprising:

a first movable portion, configured to connect an optical member, wherein light enters the optical member along an incident direction;

a fixed portion, wherein the first movable portion can move relative to the fixed portion;

a first driving assembly, configured to drive the first movable portion to move relative to the fixed portion;

a guiding slot, disposed on the first movable portion or the fixed portion; and

a plurality of guiding elements, engaged with the guiding slot,

wherein the fixed portion comprises a base and a housing having a top wall, wherein in the incident direction, a shortest distance between the first movable portion and the top wall is a first distance, a shortest distance between the first movable portion and the base is a second distance, and the guiding elements have a thickness, wherein the thickness is greater than a sum of the first distance and the second distance, wherein the first distance, the second distance, and the thickness are measured from a same direction.

20. An optical member driving mechanism, comprising:

a first movable portion, configured to connect an optical member, wherein light enters the optical member from an incident surface of the optical member along an incident direction;

a fixed portion, wherein the first movable portion can move relative to the fixed portion;

a first driving assembly, configured to drive the first movable portion to move relative to the fixed portion and comprising a pair of coils, wherein a winding axis of each of the coils is parallel to the incident direction;

a guiding slot, having an arc structure and formed on a surface of the first movable portion that is parallel to the incident surface; and

at least three guiding elements, disposed between the coils and engaged with the guiding slot, wherein the guiding elements are separated from each other, and the coils and the guiding elements are disposed on a same side of the first movable portion,

wherein as seen from the incident direction, the fixed portion has a plurality of depressions for accommodating the guiding elements, and dimensions of each of the depressions are substantially the same as dimensions of each of the guiding elements.