Topic
4 claims checked
Claim:
A voice coil motor (VCM) autofocus module typically uses a return spring so that when current is reduced or cut, the lens moves back toward a rest position.
NOT BS
Claim:
In a voice coil motor (VCM), the magnetic field is provided by a permanent magnet, and the lens position is controlled by varying the current through a copper coil.
NOT BS
Claim:
A piezoelectric motor can mechanically hold its position when power is cut (off-power holding), whereas a voice coil motor (VCM) requires current to hold position.
HARDLY BS
Claim:
A voice coil motor (VCM) used for smartphone autofocus has no gears and no friction.
MOSTLY BS