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 first magnetic permeable element disposed on the fixed portion;

a second magnetic permeable element disposed on the fixed portion;

a third magnetic permeable element disposed on the fixed portion;

a third magnetic element disposed on the movable portion;

a fourth magnetic element disposed on the movable portion; and

a guiding assembly disposed on the fixed portion, comprising:

a first guiding element disposed on the fixed portion; and

a second guiding element disposed on the fixed portion.

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

a first magnetic element disposed on the movable portion;

a second magnetic element disposed on the movable portion;

a first driving coil disposed on the fixed portion and corresponding to the first magnetic element; and

a second driving coil disposed on the fixed portion and corresponding to the second magnetic element.

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

the first magnetic element corresponds to the first guiding element;

the second magnetic element corresponds to the second guiding element;

the first magnetic element corresponds to the first magnetic permeable element;

the third magnetic element corresponds to the second magnetic permeable element;

the fourth magnetic element corresponds to the third magnetic permeable element.

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

the first magnetic element and the first guiding element generates a first force to the movable portion;

the second magnetic element and the second guiding element generates a second force to the movable portion;

the first magnetic element and the first magnetic permeable element generates a third force to the movable portion;

the third magnetic element and the second magnetic permeable element generates a fourth force to the movable portion;

the fourth magnetic element and the third magnetic permeable element generates a fifth force to the movable portion.

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

the first force, the second force, the third force, the fourth force, and the fifth force generates a resultant force to the movable portion;

the resultant force is greater than zero in a first direction;

the resultant force is greater than zero in a second direction;

the first direction and the second direction are perpendicular;

a direction of the first force is not parallel and not perpendicular to the first direction;

the direction of the first force is not parallel and not perpendicular to the second direction;

a direction of the second force is not parallel and not perpendicular to the first direction;

the direction of the second force is not parallel and not perpendicular to the second direction.

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

a direction of the third force is parallel to the first direction;

a direction of the fourth force is parallel to the second direction;

a direction of the fifth force is parallel to the first direction.

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

a first distance is between the first magnetic permeable element and the first magnetic element in the first direction;

a second distance is between the second magnetic permeable element and the third magnetic element in the second direction;

a third distance is between the third magnetic permeable element and the fourth magnetic element in the first direction;

the first distance and the second distance are different;

the first distance and the third distance are different;

the second distance and the third distance are different.

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

the first magnetic element has a first length in the second direction;

the second magnetic element has a second length in the first direction;

the third magnetic element has a third length in the first direction;

the fourth magnetic element has a fourth length in the second direction;

the first length and the third length are different;

the first length and the fourth length are different;

the second length and the third length are different;

the second length and the fourth length are different.

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

the first distance is greater than the third distance;

the first length is greater than the third length;

the first length is greater than the fourth length.

11 - 20 . (canceled)

21 . The optical element driving mechanism as claimed in claim 10 , wherein:

the second length is greater than the third length;

the second length is greater than the fourth length.

22 . The optical element driving mechanism as claimed in claim 21 , wherein:

the fixed portion comprises a bottom;

the first magnetic permeable element is disposed on the bottom;

the second magnetic permeable element is disposed on the bottom;

the third magnetic permeable element is disposed on the bottom;

the bottom comprises a bottom portion positioned between the second magnetic permeable element and the third magnetic permeable element;

the bottom is not disposed between the third magnetic element and the fourth magnetic element.

23 . The optical element driving mechanism as claimed in claim 22 , wherein:

the fixed portion comprises a first side, a second side, a third side, and a fourth side;

the first side is adjacent to the second side;

the first side is adjacent to the third side;

the second side is adjacent to the fourth side;

the third side is adjacent to the fourth side.

24 . The optical element driving mechanism as claimed in claim 23 , wherein:

the first driving coil is disposed on the first side;

the second driving coil is disposed on the second side.

25 . The optical element driving mechanism as claimed in claim 24 , wherein no driving coil is disposed on the third side and the fourth side.

26 . The optical element driving mechanism as claimed in claim 25 , wherein:

the bottom comprises a first recess and a second recess;

the first guiding element is disposed in the first recess;

the second guiding element is disposed in the second recess;

the first recess comprises a first contact surface and a second contact surface;

the second recess comprises a third contact surface;

the first guiding element is in direct contact with the first contact surface and the second contact surface;

the second guiding element is in direct contact with the third contact surface.

27 . The optical element driving mechanism as claimed in claim 26 , wherein:

the second recess further comprises a first limiting surface and a second limiting surface;

the third contact surface is adjacent to the first limiting surface and the second limiting surface;

the third contact surface is between the first limiting surface and the second limiting surface;

the second guiding element is not in contact with the first limiting surface and the second limiting surface.

28 . The optical element driving mechanism as claimed in claim 27 , wherein:

the movable portion comprises an opening;

a main axis passes through a center of the opening;

the main axis extends in a direction perpendicular to the first direction and the second direction;

a first line passes through the first guiding element and the second guiding element when viewed along the main axis;

a second line passes through the center and is perpendicular to the first line when viewed along the main axis;

a third line extends in the first direction and passes through a center of the first magnetic element when viewed along the main axis;

a fourth line extends in the second direction and passes through a center of the third magnetic element when viewed along the main axis;

a fifth line extends in the first direction and passes through a center of the fourth magnetic element when viewed along the main axis;

a direction of the resultant force is a third direction;

the third direction is not perpendicular to a direction that the first line extends;

the third direction is not parallel to a direction that the second line extends;

the first line does not pass through the center;

the third line and the fifth line do not overlap each other;

the third line does not pass through the center;

the fourth line does not pass through the center;

the fifth line does not pass through the center;

the center and the fifth line are positioned on opposite sides of the third line;

normal force between the first guiding element and the first contact surface is different than normal force between the first guiding element and the second contact surface.

29 . The optical element driving mechanism as claimed in claim 28 , wherein:

an angle between the third direction and the first direction is less than an angle between the third direction and the second direction;

the first guiding element and the third magnetic element are disposed on an identical side of the second line;

the second guiding element and the fourth magnetic element are disposed on an identical side of the second line;

the normal force between the first guiding element and the first contact surface is greater than the normal force between the first guiding element and the second contact surface.

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

the driving assembly further comprises a position sensing element;

the position sensing element and the first guiding element are disposed on an identical side of the second line when viewed along the main axis;

the optical element driving mechanism further comprises a circuit element and a temperature sensing element;

the position sensing element and the temperature sensing element are disposed on the circuit element;

the temperature sensing element is disposed on a corner of the optical element driving mechanism.