US Patent 7684136 Driving system and optical-element driving system

A driving system for driving an optical element in a first direction includes a linear actuator for producing a displacement in a second direction perpendicular to the first direction, a displacement picking unit being extendable in a third direction, perpendicular to both of the first and second directions, for picking out a displacement of the linear actuator, and a direction converting unit disposed at the third-direction side of the linear actuator, for converting a direction of the displacement picked out by the displacement picking unit.