Invention Grant
US08811636B2 Microspeaker with piezoelectric, metal and dielectric membrane 有权
带压电,金属和介电膜的微型扬声器

Microspeaker with piezoelectric, metal and dielectric membrane
Abstract:
This disclosure provides systems, methods and apparatus for microspeaker devices. In one aspect, a microspeaker element may include a deformable dielectric membrane that spans a speaker cavity. The deformable dielectric membrane can include a piezoactuator and a dielectric layer. Upon application of a driving signal to the piezoactuator, the dielectric layer can deflect, producing sound. In some implementations, an array of microspeaker elements can be encapsulated between a glass substrate and a cover glass. Sound generated by the microspeaker elements can be emitted through a speaker grill formed in the cover glass.
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