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METHOD AND SYSTEM FOR INPUTTING INFORMATION USING ULTRASONIC SIGNALS

  • US 20120105314A1
  • Filed: 07/31/2009
  • Published: 05/03/2012
  • Est. Priority Date: 07/21/2009
  • Status: Abandoned Application
First Claim
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1. A signal generation apparatus included in an information input system which inputs information by using a reference signal and an ultrasonic signal, comprising:

  • a reference signal generation unit which generates the reference signal;

    an ultrasonic generation unit which generates the ultrasonic signal;

    a reference signal reception unit which receives the reference signal; and

    a signal generation controller which outputs a control signal for controlling generation of the reference signal and the ultrasonic signal to the reference signal generation unit and the ultrasonic generation unit so that the reference signal and the ultrasonic signal generated by the signal generation apparatus do not interfere with a reference signal and an ultrasonic signal generated by a different information input system by using the reference signal which is generated by the different information input system and received by the reference signal reception unit.

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