Patent ID: 8520122
Filing Date: 2013-08-27
Classification: G02B

Abstract:
1. A lens driving device, comprising: a lens support for supporting a lens in an inner circumference; a plurality of coils disposed at regular intervals in a circumferential direction on an outer periphery of the lens support and having a degree of curvature corresponding to the outer periphery; a fixed member that is in the shape of a polygonal barrel and disposes the lens support in the inner circumference, and supports the lens support so as to move freely in an optical axis direction of the lens; and magnet portions that are provided at corners of the fixed member, and face the coils, respectively, wherein an electric current of equal current value is applied to each of the coils when moving the lens support in the optical axis direction, current values of the electric current applied to predetermined coils are varied when correcting tilt of the optical axis of the lens, each of the coils is a loop when viewed laterally, and includes a first side portion, a second side portion in the optical axis direction, a right side portion and a left side portion which continue to the first side portion and the second side portion of each of the coils and face a center portion between neighboring corners of the fixed member, the magnet portions include a first side magnet that faces a first side portion of each of the coils, and a second side magnet that faces a second side portion of each of the coils, and magnetic poles of the first side magnet and the second side magnet are different from each other.