Patent US5400414A successfully refreshed from Google Patents.
US5400414A
Expired / Lapsed
US
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Loudspeaker
Assignee: E W D
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Filing: 1989-09-26
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Granted: 1995-03-21
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Expires: 2009-09-26
Abstract
Abstract PCT No. PCT/EP89/01076 Sec. 371 Date Feb. 14, 1992 Sec. 102(e) Date Feb. 14, 1992 PCT Filed Sep. 26, 1989 PCT Pub. No. WO90/03711 PCT Pub. Date Apr. 5, 1990.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.
Inventors
- 👤 Karl-Heinz A. A. O. Thiele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:12
CPC Classifications
H; H04; H04R; H04R17/00; G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; H04N; H04N5/00; H04N5/64; H04N5/642; H04R1/00; H04R1/02; H04R17/005; H04R1/005
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
103 words
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.
Claim 2
Dependent Claim
103 words
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.
Claim 3
Dependent Claim
26 words
A loudspeaker according to claim 1 wherein the foils are affixed to the picture screen of one of a television receiver, monitor, and a glass pane.
Claim 4
Dependent Claim
16 words
A loudspeaker according to claim 1 wherein the piezo-polymeric foils are affixed to a projection screen.
Claim 5
Dependent Claim
33 words
A loudspeaker according to claim 1 wherein a housing of the loudspeaker has two vertical housing parts arranged with a gap and standing on a pedestal between which a projection screen is arranged.
Claim 6
Dependent Claim
19 words
A loudspeaker according to claim 4, wherein the housing parts are designed to be foldable into a compact unit.
Claim 7
Dependent Claim
31 words
A loudspeaker according to claim 4, wherein receivers for signals from a remote control unit are disposed in boxes, by means of which parameters of sound reproduction can be adjusted remotely.
Claim 8
Dependent Claim
16 words
A loudspeaker according to claim 4, the projection screen contains said piezo-polymeric foil acting as loudspeaker.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-03-20 | 1998-09-19 | 1999-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-20 | 2002-09-19 | 2003-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-20 | 2006-09-19 | 2007-03-21 | $7700.00 | Window Closed / Lapsed |