Display signs

A display sign is in the form of a flat panel loudspeaker, the graphics of the display being carried on one exposed surface of the flat panel, the latter being provided with one or more transducers such that the flat panel may be energized to transmit sound in accordance with signals supplied to the...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	MICHAEL ANDREW BEADMAN, MICHAEL ANTHONY SAUNDERS, DAVID ARTHUR VAUGHN JOHN
Format:	Patent
Sprache:	eng
Schlagworte:	ADVERTISING CRYPTOGRAPHY DEAF-AID SETS DISPLAY DISPLAYING EDUCATION ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY LABELS OR NAME-PLATES LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS PHYSICS PUBLIC ADDRESS SYSTEMS SEALS SIGNS
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Beschreibung
Zusammenfassung:	A display sign is in the form of a flat panel loudspeaker, the graphics of the display being carried on one exposed surface of the flat panel, the latter being provided with one or more transducers such that the flat panel may be energized to transmit sound in accordance with signals supplied to the one or more transducers. The sign may also be provided with an arrangement for storing inputs made by a user for later retrieval.