Electrostatic speaker

摘要

An electrostatic speaker is described that includes a curved diaphragm positioned between two electrically conductive plates. According to aspects, the curved diaphragm has an “S-shape” and is configured to electrostatically move between the conductive plates. In particular, the curved diaphragm may generally roll between the two conductive plates so as to move from left to right with respect to ends of the conductive plates and push air in a direction toward ends of the conductive plates, thus generating acoustic output. In some implementations, the configuration of the electrostatic speaker reduces a biasing voltage required for the conductive plates.

主权项

1. An electronic device configured to facilitate acoustic output, comprising:
an electrostatic transducer comprising:
a first electrode,a second electrode spaced from the first electrode at a distance which defines a region between the first electrode and the second electrode, anda diaphragm disposed in the region and including (1) a first end spaced closer to the first electrode than to the second electrode, (2) a second end spaced closer to the second electrode than to the first electrode, and (3) a curved center portion that connects the first end and the second end; device electronics comprising:
a voltage source configured to apply a DC voltage to at least one of the first electrode, the second electrode, and the diaphragm, andan audio signal source configured to apply an audio signal to at least one of the first electrode, the second electrode, and the diaphragm, to generate an electrostatic force in the region to drive at least a portion of the diaphragm within the region according to the applied audio signal and the applied DC voltage; at least one electrical contact (i) coupled to the audio signal source and (ii) respectively coupled to at least one of the first electrode, the second electrode, and the diaphragm; and at least one additional electrical contact (i) coupled to the voltage source and (ii) respectively coupled to at least one of the first electrode, the second electrode, and the diaphragm.