Driving mechanism

A driving mechanism, comprising:

• a movable portion used for holding an optical module, wherein the optical module comprises a substrate and an optical sensor, the optical module connects to an external circuit through the substrate, and the optical sensor is used for receiving light;
• a fixed portion, wherein the movable portion is movable relative to the fixed portion;
• a driving assembly used for driving the movable portion to move relative to the fixed portion;
• and
• an aperture module used for controlling size of an aperture, and the light enters to the optical sensor through the aperture
• further comprising a sensor, the driving assembly comprises a magnetic element, wherein the sensor does not overlap the magnetic element in a top view,
• wherein the sensor overlaps the aperture module in the top view.