Optical member driving mechanism
An optical member driving mechanism is provided, including a movable module, a first driving module, and a position detecting module. The movable module includes an optical member holder and a housing. The first driving module includes a first electromagnetic driving assembly disposed on the optical member holder and a second electromagnetic driving assembly disposed on the housing. The first driving module can drive the optical member holder to move relative to the housing. The position detecting module includes a magnetic member and a position detector. The magnetic member is disposed on the optical member holder. The position detector can detect the position of the optical member holder relative to the housing according to a variation in magnetic field direction.
1. An optical member driving mechanism, comprising:
a movable module, comprising an optical member holder and a housing;
a first driving module, wherein the first driving module can drive the optical member holder to move along a first direction relative to the housing, and the first driving module comprises:
a first electromagnetic driving assembly, disposed on the optical member holder; and
a second electromagnetic driving assembly, disposed on the housing; and
a position detecting module, configured to detect the motion of the optical member holder along the first direction relative to the housing, comprising:
a magnetic member, disposed on the optical member holder; and
a position detector, wherein the position detector can detect the position of the optical member holder relative to the housing according to a variation in magnetic field direction, wherein the magnetic member does not overlap the position detector as seen from all directions, which are perpendicular to a direction in which the position detector detects the position of the magnetic member based on its magnet field.
2. The optical member driving mechanism as claimed in claim 1 , wherein the optical member driving mechanism further comprises a fixed module and a second driving module, the second driving module is connected to the movable module and the fixed module and can drive the movable module to move along a second direction relative to the fixed module, wherein the second direction is different from the first direction.
3. The optical member driving mechanism as claimed in claim 2 , wherein the second driving module comprises a biasing assembly, connected to the movable module and the fixed module.
4. The optical member driving mechanism as claimed in claim 3 , wherein the second driving module further comprises a flexible member, disposed between the movable module and the fixed module and connected to the biasing assembly.
5. The optical member driving mechanism as claimed in claim 4 , wherein the position detector is disposed on the flexible member.
6. The optical member driving mechanism as claimed in claim 3 , wherein an end of the biasing assembly is affixed to the fixed module.
7. The optical member driving mechanism as claimed in claim 1 , wherein the housing comprises a seat, and the position detector is disposed on the seat.
8. The optical member driving mechanism as claimed in claim 1 , wherein the optical member driving mechanism is situated above an image sensor, and the position detector is disposed on the image sensor.
9. The optical member driving mechanism as claimed in claim 1 , wherein the line of magnetic force in the magnetic member is different from the first direction.
10. The optical member driving mechanism as claimed in claim 1 , wherein the line of magnetic force in the second electromagnetic driving assembly is different from the first direction.
11. The optical member driving mechanism as claimed in claim 1 , wherein the line of magnetic force in the magnetic member is different from the line of magnetic force in the second electromagnetic driving assembly.
12. The optical member driving mechanism as claimed in claim 1 , wherein the position detecting module further comprises a blocking member, disposed between the second electromagnetic driving assembly and the magnetic member.
13. The optical member driving mechanism as claimed in claim 1 , wherein the position detecting module further comprises a blocking member, disposed between the second electromagnetic driving assembly and the position detector.
14. The optical member driving mechanism as claimed in claim 1 , wherein the first driving module comprises another second electromagnetic driving assembly, the distance between the other second electromagnetic driving assembly and the position detector is greater than the distance between the second electromagnetic driving assembly and the position detector, and the length of the other second electromagnetic driving assembly is greater than the length of the second electromagnetic driving assembly.
15. The optical member driving mechanism as claimed in claim 1 , wherein the second electromagnetic driving assembly has a trapezoid-shaped structure, and the inclined leg of the trapezoid-shaped structure faces the position detector.
16. The optical member driving mechanism as claimed in claim 1 , wherein the housing comprises a seat having a rectangular structure, wherein the second electromagnetic driving assembly is adjacent to a side of the seat, and the position detector is adjacent to a corner of the seat.
17. The optical member driving mechanism as claimed in claim 1 , wherein the housing comprises a seat having a rectangular structure, wherein the second electromagnetic driving assembly is adjacent to a corner of the seat, and the position detector is adjacent to a side of the seat.
18. The optical member driving mechanism as claimed in claim 1 , wherein the fixed module comprises a seat, and the projection of the second electromagnetic driving assembly on the seat is separated from the projection of the position detector on the seat.
19. The optical member driving mechanism as claimed in claim 1 , wherein the fixed module comprises a seat having a rectangular structure, and the optical member driving mechanism comprises a plurality of position detecting modules, respectively disposed on opposite corners of the seat.
20. The optical member driving mechanism as claimed in claim 1 , wherein the fixed module comprises a seat having a rectangular structure, and the optical member driving mechanism comprises a plurality of position detecting modules, disposed on the same side of the seat.
21. The optical member driving mechanism as claimed in claim 1 , wherein the second electromagnetic driving assembly includes a magnet, the magnetic member includes another magnet, and the distance between the second electromagnetic driving assembly and the magnetic member is not zero.
22. The optical member driving mechanism as claimed in claim 1 , wherein the second electromagnetic driving assembly includes a magnet, the magnetic member includes another magnet, and the magnetic member is movable relative to the second electromagnetic driving assembly along the first direction.