• US 20130077803A1
  • Filed: 09/14/2012
  • Published: 03/28/2013
  • Est. Priority Date: 09/22/2011
  • Status: Active Grant
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First Claim
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1. A sound reproducing device comprising:

  • parametric speakers disposed to a display;

    a loudspeaker disposed to the display, the loudspeaker having a wider directivity than the parametric speakers;

    drivers disposed to the display for changing directions of the parametric speakers, respectively;

    a human-body sensor disposed to the display; and

    a controller connected electrically to the parametric speakers, the loudspeaker, and the human-body sensor,wherein the parametric speakers and the drivers constitute at least two parametric speaker units disposed to the display, each of said at least two parametric speaker units being composed of respective one of the parametric speakers and respective one of the drivers, andwherein the controller switches between a control of changing directions of the parametric speakers for reproducing sound information and a control of allowing the loudspeaker for reproducing the sound information based on a number of persons in front of the display which is detected from an output of the human-body sensor, such that the controller is operable to;

    control the drivers to follow the persons and reproduce sound information when the number of the persons is equal to or smaller than a number of the parametric speakers; and

    switch the reproducing of the sound information from the parametric speakers to the loudspeaker as to cause the loudspeaker to reproduce the sound information when the number of persons is greater than the number of the parametric speakers.

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