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Apparatus and method for configuring a touch screen

  • US 20050206626A1
  • Filed: 03/19/2004
  • Published: 09/22/2005
  • Est. Priority Date: 03/19/2004
  • Status: Active Grant
First Claim
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1. A method for determining an operating frequency of a touch screen unit, the method comprising:

  • providing a first set of sinusoidal signals to a plurality of electrodes of a touch screen, each sinusoidal signal in the the first set of sinusoidal signals having a first frequency;

    determining a first value indicative of the amount of current flowing from the plurality of electrodes when the touch screen is not being touched by a person and when the first set of sinusoidal signals is provided to the plurality of the electrodes;

    providing a second set of sinusoidal signals to the plurality of electrodes of the touch screen, each sinusoidal signal in the second set of sinusoidal signals having a second frequency;

    determining a second value indicative of the amount of current flowing from the plurality of electrodes when the touch screen is not being touched by the person and when the second set of sinusoidal signals is provided to the plurality of the electrodes; and

    determining an operating frequency of sinusoidal signals to be provided to the plurality of electrodes based on the first value and the second value.

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