Electrostatic loudspeaker
US8103028B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Sep 30, 2009 |
| Grant date | Jan 24, 2012 |
| Priority date | — |
| Expiry date | Sep 18, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R19/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electrostatic loudspeaker includes a backplate having a metal film acting as one electrode of a capacitor and defining a number of sound apertures therein; a diaphragm insulatively spaced a distance from the backplate to form the capacitor; the diaphragm comprising a metal film acting as the other electrode of the capacitor; a back chamber having a substrate and an insulative spacer for joining edge portions of the diaphragm and the substrate; a driving circuit element for converting electrical signals from exterior input pads into driving signals to drive the diaphragm to vibrate and sound; the driving circuit element being mounted on an inner surface of the substrate and being accommodated in the back chamber; and a first, second and third connection paths for respectively electrically connecting the driving circuit element with the two electrodes of the capacitor, and the exterior input pads. An electrostatic loudspeaker with two backplates is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.