Abstract: An actuator includes a magnet, a driving coil facing the magnet, a driver, and a position calculation processor. The driver is configured to move the magnet in at least one of an optical axis direction and a direction perpendicular to the optical axis by applying a driving signal to the driving coil. The position calculation processor includes sensing coils, and is configured to calculate a position of the magnet according to inductance levels of an inductor of the sensing coils. The inductance levels vary according to movements of the magnet.

Abstract: A camera module actuator is described including a magnet, a coil disposed to face the magnet, and a driver configured to apply a driving signal to the coil to move the magnet. The camera module actuator also includes a detector configured to detect a position of the magnet from a change in inductance of the coil, based on the movement of the magnet.

Abstract: A sensing unit of a camera module includes a detection target provided on a side surface of a lens module, one or more sensing coils disposed to face the detection target, and a calculator. The calculator may determine a displacement of the detection target translated in any of an optical axis direction, a first direction perpendicular to the optical axis direction, and a second direction perpendicular to the optical axis direction, based on inductances of the one or more sensing coils.

Abstract: A camera module comprises a lens barrel, a lens driving device including a focusing unit moving a lens barrel in an optical axis direction and a movement correction unit moving the lens barrel in a direction perpendicular to the optical axis direction, and a housing accommodating the lens barrel and the lens driving device. A focus sensing portion of the focusing unit is disposed in an area not including a planar surface on which a focusing magnet and a focusing coil are mounted.

Abstract: An actuator of a camera module includes: a detection target; and a position detecting unit disposed to face the detection target and including at least two sensing coils respectively forming at least two oscillation circuits, wherein the position detecting unit detects a position of the detection target depending on at least two oscillation signals generated by the at least two oscillation circuits and having different frequency ranges.

Abstract: An actuator and a camera module including the same are provided. The actuator driving apparatus includes a detector configured to apply a reference signal to a driving coil of an actuator and detect a coil current flowing in the driving coil, a calculator configured to determine a position of a lens carrier based on the coil current, and a driver configured to drive the actuator based on the position of the lens carrier and a position control signal.

Abstract: A camera module comprises a lens barrel, a lens driving device including a focusing unit moving a lens barrel in an optical axis direction and a movement correction unit moving the lens barrel in a direction perpendicular to the optical axis direction, and a housing accommodating the lens barrel and the lens driving device. A focus sensing portion of the focusing unit is disposed in an area not including a planar surface on which a focusing magnet and a focusing coil are mounted.

Abstract: A sensing unit of a camera module includes a detection target provided on a side surface of a lens module, one or more sensing coils disposed to face the detection target, and a calculator. The calculator may determine a displacement of the detection target translated in any of an optical axis direction, a first direction perpendicular to the optical axis direction, and a second direction perpendicular to the optical axis direction, based on inductances of the one or more sensing coils.

Abstract: An actuator of a camera module includes: a detection target; and a position detecting unit disposed to face the detection target and including at least two sensing coils respectively forming at least two oscillation circuits, wherein the position detecting unit detects a position of the detection target depending on at least two oscillation signals generated by the at least two oscillation circuits and having different frequency ranges.

Abstract: An actuator includes a magnet, a driving coil facing the magnet, a driver, and a position calculation processor. The driver is configured to move the magnet in at least one of an optical axis direction and a direction perpendicular to the optical axis by applying a driving signal to the driving coil. The position calculation processor includes sensing coils, and is configured to calculate a position of the magnet according to inductance levels of an inductor of the sensing coils. The inductance levels vary according to movements of the magnet.

Abstract: A camera module actuator is described including a magnet, a coil disposed to face the magnet, and a driver configured to apply a driving signal to the coil to move the magnet. The camera module actuator also includes a detector configured to detect a position of the magnet from a change in inductance of the coil, based on the movement of the magnet.

Abstract: An actuator driving apparatus includes an inductor disposed on a housing to face a magnetic body attached to a lens carrier, a detector configured to apply a reference signal to the inductor and detect an inductor current flowing through the inductor, a calculator configured to determine a position of the lens carrier based on the inductor current, and a driver configured to drive an actuator based on the position of the lens carrier and a position control signal.

Abstract: An actuator and a camera module including the same are provided. The actuator driving apparatus includes a detector configured to apply a reference signal to a driving coil of an actuator and detect a coil current flowing in the driving coil, a calculator configured to determine a position of a lens carrier based on the coil current, and a driver configured to drive the actuator based on the position of the lens carrier and a position control signal.

Abstract: An actuator driving apparatus includes an inductor disposed on a housing to face a magnetic body attached to a lens carrier, a detector configured to apply a reference signal to the inductor and detect an inductor current flowing through the inductor, a calculator configured to determine a position of the lens carrier based on the inductor current, and a driver configured to drive an actuator based on the position of the lens carrier and a position control signal.

Abstract: The present invention provides a horizontal linear vibrator which can reduce the thickness but increase vibration strength while at the same time guaranteeing a sufficiently long lifetime and satisfactory responsivity. The horizontal linear vibrator includes a casing, a bracket, a vibration unit and springs. The casing defines an internal space therein. The bracket is disposed under the casing. A cylindrical coil is provided on the bracket. The vibration unit has a magnet, a yoke and a weight. The yoke contains the magnet therein and is open on the lower end thereof. The weight is coupled to the outer surface of the yoke. The springs are coupled to sidewall plates of the casing or the bracket. The springs elastically support the vibration unit to allow the vibration unit to vibrate in the horizontal direction.

Abstract: There is provided a spindle motor including: a lower thrust member fixed to a base member; a shaft having a lower end portion fixed to the lower thrust member; and a rotating member rotating around the shaft and having a circulating hole formed therein in order to circulate a lubricating fluid, wherein a thrust dynamic groove is formed in at least one of facing surfaces of the rotating member and the lower thrust member, and an air bubble collecting groove having a ring shape is formed in at least one of the facing surfaces of the rotating member and the lower thrust member so as to be overlapped with the circulating hole.

Abstract: There is provided a vibration generating device, including: a housing including an inner space; a shaft provided in the inner space of the housing in an axial direction; a frame including a shaft hole into which the shaft is fitted; a bearing member mounted on the frame to be vibrated in a state of contact with the shaft; a vibrating part mounted on an outer surface of the frame and including a magnetic field generation part; elastic members mounted on both ends of the vibrating part in the axial direction; and a coil provided in the inner space and vibrating the vibrating part by interaction with the magnetic field generation part.

Abstract: There is provided a spindle motor including: a rotating member including a protrusion portion protruded so as to form a clearance narrower than a bearing clearance; and a fixed member having a protrusion corresponding portion protruded so as to be disposed to face the protrusion portion and rotatably supporting the rotating member, wherein the protrusion portion includes a thrust dynamic pressure groove formed therein in order to generate thrust fluid dynamic pressure and has a radial length smaller than that of the protrusion corresponding portion disposed to face the thrust dynamic pressure groove and having a flat surface.

Abstract: There is provided a vibration generating device, including: a housing including an inner space; a shaft provided in the inner space of the housing in an axial direction; a frame including a shaft hole into which the shaft is fitted; a bearing member mounted on the frame to be vibrated in a state of contact with the shaft; a vibrating part mounted on an outer surface of the frame and including a magnetic field generation part; elastic members mounted on both ends of the vibrating part in the axial direction; and a coil provided in the inner space and vibrating the vibrating part by interaction with the magnetic field generation part.

Abstract: Disclosed herein is a linear vibrator having a mass body which is accommodated in a casing defining an internal space and is vibrated. The linear vibrator includes a bracket supporting the linear vibrator from a lower position. The bracket has a depression in a bottom thereof such that a coil lead wire of a coil is placed in the depression, thus preventing friction between the coil lead wire and a movable unit.