Shicoh Engineering Co., Ltd.

New Shicoh Technology Co., Ltd.

Satoshi Asakawa

Manabu Shiraki

Naoki Sekiguchi

Morimasa Yoshie

Koji Toyama

A lens driving device, an autofocus camera and a camera-equipped mobile terminal are provided that can correct movement of a lens in an optical axis direction and tilt of an optical axis, and reduce the dimension thereof in the optical axis direction. The device includes: a lens supportfor supporting a lens at an inner circumference; a plurality of coilstodisposed at regular intervals in a circumferential direction on an outer periphery of the lens support; a basethat supports the lens supportso as to move freely in an optical axis direction of the lens; and a magnet portionprovided on the baseand facing each of the coilsto, in which an electric current of equal current value is applied to each of the coilstowhen moving the lens supportin the optical axis direction, and current values of the electric current applied to predetermined coilstoare varied when correcting tilt of the optical axis of the lens.

Lens driving device, autofocus camera, and camera-equipped mobile terminal

A lens driving apparatus includes: a first yoke having an inner peripheral wall and an outer peripheral wall placed to be concentric with each other and forming a rectangular U-shape cross section and a cylindrical shape; a second yoke placed at an outer side of the first yoke to be concentric with the first yoke and forming a rectangular U-shape cross section and a cylindrical shape; a base; a first magnet and a first coil arranged in a rectangular U-shape interior of the first yoke; a second magnet and a second coil arranged in a rectangular U-shape interior of the second yoke; a first lens support member; and a second lens support member. The second lens support member is placed at an inner peripheral side of the second yoke and has the second coil fixed onto an outer periphery thereof. The first lens support member is linearly moved in a direction of an optical axis of a lens by an electromagnetic force caused by passing current through the first coil. The second lens support member is linearly moved in a direction of an optical axis of a lens by an electromagnetic force caused by passing current through the second coil.

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Kanagawa, Japan

Satoshi Asakawa