Patent ID: 6169809
Filing Date: 2001-01-02
Classification: G06F,G07F,H04R

Abstract:
A visual display unit comprising a display screen, a housing in which the display screen is mounted, and a loudspeaker in the housing, wherein the loudspeaker comprises: a member having capability to sustain and propagate input vibrational energy by a plurality of resonant bending wave modes in at least one operative area extending transversely of thickness, wherein the frequencies of resonant bending wave modes are interleaved in the predetermined frequency range so that the frequencies of the resonant bending wave modes are substantially evenly distributed; and a transducer mounted wholly and exclusively on said operative area of the member, at a preferential location or site for coupling to the resonant bending wave modes, to vibrate the member and excite said resonant bending wave modes in the member, the resonant bending wave modes in turn producing an acoustic output, and wherein the housing has an external wall which is integral with the member and is formed with a groove which surrounds the member and defines a resilient suspension coupling the loudspeaker to the housing.