Lens driving device, automatic focusing camera and mobile terminal having camera

Abstract

The invention provides a lens driving device, an automatic focusing camera and a mobile terminal device having the camera. In the invention, through a simple structure, a movement of a lens support body towards an optical axis direction and a movement in an X-Y direction which is orthogonal with the optical axis are realized. In the lens driving device 1, four coils 19a-19d arranged at intervals on the outer periphery of a lens support body 5 form a ring having a front side part 21 and a rear side part 23 in a lens optical axis direction. A magnet 17A and a magnet 17B have reverse poles on the front side part 21 or the rear side part 23 of the coil. And the magnetic center V1, V2 of the magnets in the optical axis direction deviate with positions of centers W1, W2 in the optical axis direction of the front side part 21 or the rear side part 23. When the lens support body 5 is moved towards the optical axis direction, equal currents are arranged in coils 19a-19d. When the lens support body 5 is moved in the X-Y direction which is orthogonal with the optical axis, the currents arranged in the coils 19a-19d are different.

Description

technical field [0001] The present invention is a related lens driving device, an auto-focus camera, and a mobile terminal with a camera. In addition, the so-called mobile terminal refers to a mobile phone, a portable information terminal (PDA), a notebook computer, and the like. Background technique [0002] In Patent Document 1 (International Publication No. WO2008 / 128407), it is disclosed that a plurality of magnets are arranged at equal intervals in the axial direction of the outer periphery of the lens support body, and the lens support body is supported to move freely in the optical axis direction. A coil is arranged on the position opposite to the magnet on the frame body. By controlling the current flowing to each coil, the lens support is tilted to move the lens support linearly (movement in the direction of the optical axis) and to correct the inclination of the optical axis. [0003] In Patent Document 2 (Patent Publication No. 2002-373435), a light-harvesting d...

AI Technical Summary

Problems solved by technology

[0005] However, in the technology of Patent Document 1, the lens support cannot be moved in the X-Y direction in order to correct the camera shake.

[0006] On the other hand, in a lens driving device for a compact camera, the movement of the lens support in the optical axis direction (Z direction) and the movement in the X-Y direction (handshake correction) have been realized by moving only the lens support. no

[0007] In addition, in the technology of Patent Document 2, only movement in the X direction is possible, and hand shake correction (movement in the X-Y direction on a plane perpendicular to the optical axis) is not possible.

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