Patent ID: 9348108
Filing Date: 2016-05-24
CPC Classification: G02B,G03B

Claim Text:
1. A lens driving device, comprising: a lens support for retaining a lens; a box body for accommodating the lens support; a spring component for supporting the lens support in the box body in a suspension mode in a direction of an optical axis of the lens; at least one primary coil wound around the optical axis and mounted on an inner side of the box body; a secondary coil coaxial to the at least one primary coil, wound around the optical axis and mounted on an outer peripheral side of the lens support; a permanent magnet or a permanent magnet assembly arranged on the inner side of the box body and arranged opposite to the secondary coil at an interval along a radial direction of the lens; and a diode with its two ends connected with two coil terminals of the secondary coil respectively; wherein the connected diode and the secondary coil form a closed-loop circuit, and electromagnetic induction is generated along with a supply of a driving current to the at least one primary coil, so that a secondary current is generated in the secondary coil based on the electromagnetic induction, and the diode serially connected between the two coil terminals of the secondary coil enables the secondary current to flow in a preset direction.