Anti-shake apparatus for correcting hand shake effect through first and second drive coil units

1. An anti-shake apparatus of a photographing apparatus, comprising:

a movable unit that has one of an imaging device and a hand-shake correcting lens, and has a first coil unit having a first driving coil and a first position-detecting coil, and has a second coil unit having a second driving coil and a second position-detecting coil, and is movable in a first direction and a second direction; and

a fixed unit that has a first permanent magnet and a second permanent magnet;

said first direction being perpendicular to an optical axis of a camera lens of said photographing apparatus;

said second direction being perpendicular to said optical axis and said first direction;

said first driving coil and said first permanent magnet being used for moving said movable unit in said first direction;

said second driving coil and said second permanent magnet being used for moving said movable unit in said second direction;

said first position-detecting coil and said first permanent magnet being used for detecting a first location in said first direction of said movable unit; and

said second position-detecting coil and said second permanent magnet being used for detecting a second location in said second direction of said movable unit.

2. The anti-shake apparatus according to claim 1 , wherein a first electromotive force, caused by electro-magnetic induction, occurs on the basis of a first movement of said first position-detecting coil being included in said movable unit and of a first magnetic-field of said first permanent magnet;

detecting said first location is performed by using a first detected-velocity signal as a velocity of said first movement in said first direction corresponding to said first electromotive force, and a time length of said first movement;

a second electromotive force, caused by electro-magnetic induction, occurs on the basis of a second movement of said second position-detecting coil being included in said movable unit and of a second magnetic-field of said second permanent magnet; and

detecting said second location is performed by using a second detected-velocity signal as a velocity of said second movement in said second direction corresponding to said second electromotive force, and a time length of said second movement.

3. The anti-shake apparatus according to claim 2 , wherein the size and the direction of said first electromotive force caused by the electro-magnetic induction, is determined by the size of the force and the direction of said first movement, and by the size and the direction of said first magnetic-field; and

the size and the direction of said second electromotive force caused by the electro-magnetic induction, is determined by the size of the force and the direction of said second movement, and by the size and the direction of said second magnetic-field.

4. The anti-shake apparatus according to claim 1 , wherein said first coil unit is wound, such that its circumference shape, viewed from a third direction which is parallel to said optical axis, is a rectangle and faces said first permanent magnet;

an external structure of said rectangle of said first coil unit, forms lines which are parallel to one of said first direction and said second direction;

said second coil unit is wound, such that its circumference shape, viewed from said third direction, is a rectangle and faces said second permanent magnet;

an external structure of said rectangle of said second coil unit, forms lines which are parallel to one of said first direction and said second direction;

said first permanent magnet is attached to said fixed unit under the condition where the N pole and S pole are arranged in said first direction; and

said second permanent magnet is attached to said fixed unit under the condition where the N pole and S pole are arranged in said second direction.

5. The anti-shake apparatus according to claim 4 , wherein said first driving coil forms a seat and spiral shape coil pattern;

said second driving coil forms a seat and spiral shape coil pattern;

said first position-detecting coil forms a seat and spiral shape coil pattern; and

said second position-detecting coil forms a seat and spiral shape coil pattern.

6. The anti-shake apparatus according to claim 5 , wherein said seat and spiral shape coil pattern of said first driving coil and said seat and spiral shape coil pattern of said first position-detecting coil are layered in said third direction; and

said seat and spiral shape coil pattern of said second driving coil and said seat and spiral shape coil pattern of said position-detecting coil are layered in said third direction.

7. The anti-shake apparatus according to claim 1 , wherein said movable unit is located at the center of its movable range, in both said first and second directions, when a center area of one of said imaging device and said hand-shake correcting lens which is included in said movable unit, is located on said optical axis.