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US 5,400,414 AGranted
Loudspeaker
AssigneeElectronic-Werke Deutschland GmbH
InventorKarl-Heinz A. A. O. Thiele
Life of this patent
Estimating the term…
Abstract
An electromechanical transducer made of a piezo-polymer film is presented. The film is transparent and is applied to a television screen, glass pane of a framed picture, or the like. The piezo-polymer film is arranged to provide a plurality of loudspeakers of a television apparatus which can be controlled by a digital audio signal.
Claims7
A loudspeaker for a television display comprising:
- a transparent piezo-polymeric foil disposed on a television display device,
- a plurality of loudspeakers being formed on one foil, each of the loudspeakers having respective electrodes for electrical activation, each of the loudspeakers having a plurality of sections of different surface sizes, the surface sizes having relative surface areas according to progressive powers of two for providing a digital output according to the significance of the respective bits of a digital signal, the plurality of sections being arranged as concentric rings with gaps therebetween, with the annular widths of each ring increasing with increasing ring diameter.
Dependencies are inferred from the claim text.