A controller is capable of reducing time required to stop a control target at a target stop position as a final stop position. The controller drives a vibration element including a piezoelectric element by an AC signal to thereby move a contact body, in contact with the vibration element, relative to the vibration element. The controller controls a pulse duty cycle of a signal converted to the AC signal based on a difference between a target stop position, which is a final stop position of the contact body, and a current position of the contact body, and an actual speed of the contact body.

A controller is capable of reducing time required to stop a control target at a target stop position as a final stop position. The controller drives a vibration element including a piezoelectric element by an AC signal to thereby move a contact body, in contact with the vibration element, relative to the vibration element. The controller controls a pulse duty cycle of a signal converted to the AC signal based on a difference between a target stop position, which is a final stop position of the contact body, and a current position of the contact body, and an actual speed of the contact body.

A linear motor capable of improving power efficiency while preventing enlargement. A winding core direction of a coil coincide with a thrust direction of the linear motor. A center yoke is arranged inside the coil extending in the thrust direction. A magnet faces the center yoke outside the coil so that its magnetization direction is perpendicular to the thrust direction. A back yoke adjoins the main magnet at an opposite side of the center yoke. Two sub magnets adjoin the main magnet and their magnetization directions are inclined by 90° to that of the main magnet. Two side yokes adjoin the center and back yokes at both sides a magnet group in the thrust direction. Surfaces of the main magnet that adjoin the sub magnets incline inward toward the back yoke. Surfaces of the sub magnets that adjoin the main magnet incline inward toward the center yoke.

A linear motor capable of improving power efficiency while preventing enlargement. A winding core direction of a coil coincide with a thrust direction of the linear motor. A center yoke is arranged inside the coil extending in the thrust direction. A magnet faces the center yoke outside the coil so that its magnetization direction is perpendicular to the thrust direction. A back yoke adjoins the main magnet at an opposite side of the center yoke. Two sub magnets adjoin the main magnet and their magnetization directions are inclined by 90° to that of the main magnet. Two side yokes adjoin the center and back yokes at both sides a magnet group in the thrust direction. Surfaces of the main magnet that adjoin the sub magnets incline inward toward the back yoke. Surfaces of the sub magnets that adjoin the main magnet incline inward toward the center yoke.

A camera module includes a lens holder accommodating a lens module therein, a housing accommodating the lens module and the lens holder therein, a shake correction unit including first and second magnets, disposed in the lens holder, and first and second coils disposed to face the first and second magnets, a focusing unit including a third magnet, disposed in the lens module, and a third coil disposed on a first substrate disposed on the lens holder, and a plurality of ball members configured to support movement of the lens module in a direction perpendicular to an optical axis. The lens module, the lens holder, the third magnet, and the third coil are moved together in the direction perpendicular to the optical axis, by driving force of the shake correction unit.

A camera module includes a lens holder accommodating a lens module therein, a housing accommodating the lens module and the lens holder therein, a shake correction unit including first and second magnets, disposed in the lens holder, and first and second coils disposed to face the first and second magnets, a focusing unit including a third magnet, disposed in the lens module, and a third coil disposed on a first substrate disposed on the lens holder, and a plurality of ball members configured to support movement of the lens module in a direction perpendicular to an optical axis. The lens module, the lens holder, the third magnet, and the third coil are moved together in the direction perpendicular to the optical axis, by driving force of the shake correction unit.

A control apparatus includes a tilt driving unit configured to perform tilt driving, a focus driving unit, a control unit configured to control the focus driving unit and the tilt driving unit for focusing on at least a first area and a second area in a plurality of areas in an image, and a first determination unit configured to determine a control method of the control unit based on whether or not a difference between a position of at least one of the first area and the second area and a position corresponding to a tilt axis in the image is smaller than a predetermined threshold.

A control apparatus includes a tilt driving unit configured to perform tilt driving, a focus driving unit, a control unit configured to control the focus driving unit and the tilt driving unit for focusing on at least a first area and a second area in a plurality of areas in an image, and a first determination unit configured to determine a control method of the control unit based on whether or not a difference between a position of at least one of the first area and the second area and a position corresponding to a tilt axis in the image is smaller than a predetermined threshold.

A lens barrel includes a first lens holding frame that holds a first lens and has a first protruding portion, a first motor configured to move the first lens holding frame in an optical axis direction, a second lens holding frame that holds a second lens and has a second protruding portion, a second motor configured to move the second lens holding frame in the optical axis direction, and an outer barrel that has a straight groove engaging with the first protruding portion and the second protruding portion and extending in the optical axis direction, and is disposed further outward than the first lens holding frame and the second lens holding frame.

A lens barrel includes a first lens holding frame that holds a first lens and has a first protruding portion, a first motor configured to move the first lens holding frame in an optical axis direction, a second lens holding frame that holds a second lens and has a second protruding portion, a second motor configured to move the second lens holding frame in the optical axis direction, and an outer barrel that has a straight groove engaging with the first protruding portion and the second protruding portion and extending in the optical axis direction, and is disposed further outward than the first lens holding frame and the second lens holding frame.