OPTICAL ELEMENT DRIVING MECHANISM

1 . An optical element driving mechanism, comprising:

a movable portion used for connecting an optical element;

a fixed portion, wherein the movable portion is movable relative to the fixed portion; and

a driving assembly used for driving the movable portion to move relative to the fixed portion.

2 . The optical element driving mechanism as claimed in claim 1 , further comprising a guiding assembly and a magnetically permeable assembly;

wherein:

the driving assembly comprises a plurality of magnetic elements and a plurality of driving coils;

the guiding assembly comprises at least one guiding element;

the magnetically permeable assembly comprises at least one magnetically permeable element;

the guiding assembly is magnetically permeable;

the magnetically permeable assembly is magnetically permeable.

3 . The optical element driving mechanism as claimed in claim 2 , wherein:

a sum of a number of the guiding elements and a number of the magnetically permeable elements is identical to a number of the magnetic elements;

the sum of the numbers of the guiding elements and the numbers of the magnetically permeable elements is equal to a number of the driving coils.

4 . The optical element driving mechanism as claimed in claim 3 , wherein:

the at least one guiding element comprises a first guiding element and a second guiding element;

the at least one magnetically permeable element comprises a first magnetically permeable element and a second magnetically permeable element;

the fixed portion comprises a bottom;

the bottom is polygonal;

the bottom comprises a first corner, a second corner, a third corner, and a fourth corner;

the first corner and the third corner are opposite;

the second corner and the fourth corner are opposite;

the first guiding element is disposed on the first corner;

the first magnetically permeable element is disposed on the second corner;

the second guiding element is disposed on the third corner;

the second magnetically permeable element is disposed on the fourth corner.

5 . The optical element driving mechanism as claimed in claim 4 , wherein:

the first guiding element and the second guiding element are columnar;

the first magnetically permeable element and the second magnetically permeable element are plate-shaped;

the first guiding element and the second guiding element extend in a first direction;

a normal vector of the first magnetically permeable element is perpendicular to the first direction;

a normal vector of the second magnetically permeable element is perpendicular to the first direction.

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

the first guiding element and the second guiding element are in direct contact with the movable portion;

the first magnetically permeable element and the second magnetically permeable element are separated from the movable portion.

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

the magnetic elements comprise a first magnetic element;

the driving coils comprise a first driving coil;

the first magnetic element corresponds to the first driving coil;

the first magnetic element comprises a first surface and a second surface;

the first surface faces the first magnetically permeable element;

the second surface faces the first driving coil;

the optical element driving mechanism further comprises a third magnetically permeable element disposed on the first magnetic element;

the first surface is exposed from the third magnetically permeable element;

the second surface is exposed from the third magnetically permeable element.

8 . The optical element driving mechanism as claimed in claim 7 , wherein the first magnetic element and the first magnetically permeable element at least partially overlap each other when viewed in a direction perpendicular to the second surface.

9 . The optical element driving mechanism as claimed in claim 8 , wherein:

the first magnetic element further comprises a third surface, a fourth surface, a fifth surface, and a sixth surface;

the third surface is opposite to the first surface;

the fourth surface is opposite to the second surface;

the fifth surface is adjacent to the first surface, the second surface, the third surface, and the fourth surface;

the sixth surface is adjacent to the first surface, the second surface, the third surface, and the fourth surface;

the fifth surface is opposite to the sixth surface;

the third magnetically permeable element is disposed on the third surface;

the third magnetically permeable element is disposed on the fourth surface;

the third magnetically permeable element is disposed on the fifth surface;

the third magnetically permeable element is disposed on the sixth surface.

10 . The optical element driving mechanism as claimed in claim 9 , wherein at least a portion of the movable portion is disposed between the third magnetically permeable element and the first magnetic element.

11 . The optical element driving mechanism as claimed in claim 10 , further comprising a circuit element, a first bonding element, and a second bonding element;

wherein:

the driving coils are disposed on the circuit element through the first bonding element;

the driving coils are disposed on the circuit element through the second bonding element;

the first bonding element is in direct contact with the second bonding element;

the first bonding element and the second bonding element comprise different materials.

12 . The optical element driving mechanism as claimed in claim 11 , wherein:

the circuit element comprises an opening;

the first bonding element is not disposed on the opening;

the second bonding element is not disposed on the opening.

13 . The optical element driving mechanism as claimed in claim 12 , wherein:

the first driving coil comprises a first coil surface, a second coil surface, a third coil surface, and a fourth coil surface;

the first coil surface faces the circuit element;

the second coil surface is adjacent to the first coil surface;

the first bonding element covers at least a portion of the first coil surface;

the second bonding element covers at least a portion of the second coil surface;

the third coil surface is opposite to the first coil surface;

the second coil surface is opposite to the fourth coil surface.

14 . The optical element driving mechanism as claimed in claim 13 , wherein:

the first bonding element and the second bonding element are not disposed on the third coil surface;

the first bonding element and the second bonding element are not disposed on the fourth coil surface.

15 . The optical element driving mechanism as claimed in claim 14 , wherein:

the first driving coil comprises a leading wire;

the circuit element comprises a conductive pad;

the leading wire connects to the conductive pad;

the second bonding element covers at least a portion of the leading wire;

the second bonding element covers at least a portion of the conductive pad.

16 . The optical element driving mechanism as claimed in claim 15 , wherein:

the first bonding element does not cover the leading wire;

the first bonding element does not cover the conductive pad.

17 . The optical element driving mechanism as claimed in claim 16 , wherein:

the magnetic elements further comprise a second magnetic element, a third magnetic element, and a fourth magnetic element disposed on the movable portion;

the driving coils further comprise a second driving coil, a third driving coil and a fourth driving coil disposed on the fixed portion;

the second magnetic element corresponds to the second driving coil;

the third magnetic element corresponds to the third driving coil;

the fourth magnetic element corresponds to the fourth driving coil.

18 . The optical element driving mechanism as claimed in claim 17 , wherein:

a first magnetic force is generated between the first magnetic element and the first magnetically permeable element and applied on the movable portion;

a second magnetic force is generated between the second magnetic element and the first guiding element and applied on the movable portion;

a third magnetic force is generated between the third magnetic element and the second magnetically permeable element and applied on the movable portion;

a fourth magnetic force is generated between the fourth magnetic element and the second guiding element and applied on the movable portion;

the first magnetic force, the second magnetic force, the third magnetic force, and the fourth magnetic force have different directions.

19 . The optical element driving mechanism as claimed in claim 18 , wherein:

directions of the first magnetic force and the third magnetic force are opposite;

directions of the second magnetic force and the fourth magnetic force are opposite.

20 . The optical element driving mechanism as claimed in claim 19 , wherein:

the first magnetic force generates a first torque to the movable portion;

the second magnetic force generates a second torque to the movable portion;

the third magnetic force generates a third torque to the movable portion;

the fourth magnetic force generates a fourth torque to the movable portion;

directions of the first torque, the second torque, the third torque, and the fourth torque are identical.