Loudspeaker, and voice coil driving system and driving method of loudspeaker

Abstract

A method for driving a voice coil of a loudspeaker may include providing a magnetic circuit having an air gap, providing a voice coil suspended in the air gap, and applying an audio signal to the voice coil to move the voice coil along a travel axis, the voice coil including a main voice coil segment, and a pair of auxiliary voice coil segments disposed along the travel axis, wherein the voice coil segments in the pair of auxiliary voice coil segments are respectively arranged at any side of the main voice coil segment, and applying an audio signal comprises continuously coupling a main driving signal to the main voice coil segment based on the audio signal and selectively coupling an auxiliary driving signal to the pair of auxiliary voice coil segments based on the audio signal. The disclosed embodiments further relate to a voice coil drive system and a speaker including the voice coil drive system.

Description

[0001]Cross-references on application[0002]This application claims the priority of U.S. Provisional Application No. 62 / 890,962 filed on August 23, 2019, the entirety of which is incorporated herein by reference.Technical field[0003]This application generally relates to speakers, and more specifically, voice coil configurations, voice coil driving systems for speakers, and methods for driving voice coils of speakers for improving power processing and reducing electrical energy consumption of driving electronic components.Background technique[0004]Referring to the speaker 50 in the art shown in FIGS. 1a to 1b, the speaker 50 equipped with the voice coil 1 includes a plurality of coil windings, and the coil windings are powered by a driving power source, so that the voice coil 1 is reciprocally excited (actuate) to generate acoustic audio The diaphragm 7.[0005]The coil winding is partially placed in the air gap 3 of the magnetic circuit 2, which is the area with the highest magnetic fl...

AI Technical Summary

Problems solved by technology

[0005] The coil windings are partly placed in the air gap 3 of the magnetic circuit 2, which is where the region with the highest magnetic flux density resides, and when the coil windings are powered, they interact with the magnetic field of the magnetic circuit 2 to generate the sound for translating. The EMF of coil 1, however, is only actually provided by the voice coil 1 windings in the air gap 3 to reciprocate the substantial force of the voice coil 1, while the voice coil windings outside the air gap 3 do not contribute to the generation of significant EMF, these The winding is powered and in turn contributes to heating the voice coil, which becomes a major limiting factor in loudspeaker design

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