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...http://www.google.fr/patents/US5400414?utm_source=gb-gplus-shareBrevet US5400414 - Loudspeaker
