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US 5,212,736 AGranted
Ribbon speaker
AssigneePioneer Electronic Corporation
InventorTsunehiro Tsukagoshi
Life of this patent
Estimating the term…
Abstract
A vibrating diaphragm is disposed in a magnetic gap. The diaphragm comprises two organic films superimposed on each other, and two metal films overlaid on the organic films, respectively. One of the organic films has a smaller polarization and the other organic film has a large polarization. Both metal films are different in work function, and electrically connected by a metal film. Electric current is supplied to the vibrating diaphragm to vibrate it.
Claims4
A ribbon speaker having a vibrating diaphragm disposed in a magnetic gap, comprising:
- the vibrating diaphragm comprising first and second organic films superimposed on each other, and first and second metal films overlaid on said first and second organic films, respectively,
- the first organic film having a given polarization and the second organic film having a larger polarization than that of said first organic film, the first and second metal films being different in work function;
- a third metal film electrically connecting the first and second metal films;
- and
- means for supplying current to the vibrating diaphragm.
2 more elements
Dependencies are inferred from the claim text.