Patent ID: 11882424
Assignee: GOOD NETWORKS CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A speaker driver from which a suspension has been omitted, the speaker driver comprising:
a magnet unit disposed in a position;
a vibration unit disposed adjacent to the magnet unit and configured to generate sound through vibration;
a winding unit disposed in a coiled configuration between the magnet unit and the vibration unit, generating magnetism in a first direction or a second direction which is opposite to the first direction when power is supplied to the winding unit, and vibrating the vibration unit by applying, to the vibration unit, a force generated in association with the magnetism of the magnet unit; and
a controller configured to control a magnitude of the power supplied to the winding unit,
wherein the controller is configured to generate a zero-point control signal corresponding to an inaudible frequency signal in order for the vibration unit to vibrate in an inaudible frequency band, and to supply power corresponding to the zero-point control signal to the winding unit in order to place the vibration unit at a zero point.