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Touch Screen System

  • US 20120306792A1
  • Filed: 06/01/2012
  • Published: 12/06/2012
  • Est. Priority Date: 06/01/2011
  • Status: Active Grant
First Claim
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1. A touch screen system, comprising:

  • an electrically non-conductive substrate;

    at least one electrically conductive pad disposed upon the substrate;

    an electrically non-conductive cover placed over the pad; and

    a controller having a touch switch interface and at least one output, the touch switch interface being electrically coupled to the pad,the controller generating an AC signal, the AC signal being electrically coupled from the controller to the pad through the touch screen interface, thereby generating an electrostatic field proximate the pad,the controller being configured to detect at the touch screen interface a change in the electrostatic field resulting from an actuating member contacting the cover proximate the pad, andthe controller providing at the output a signal relating to the change in the electrostatic field.

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