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Touch sensor input system for a computer display

  • US 5,694,154 A
  • Filed: 08/10/1995
  • Issued: 12/02/1997
  • Est. Priority Date: 11/08/1994
  • Status: Expired due to Fees
First Claim
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1. A touch screen display system, comprising:

  • a display screen including a cathode ray tube (CRT);

    an extra high tension (EHT) generator;

    a plurality of conductive pads on said display screen, each of said conductive pads being separated by an isolating region;

    a plurality of sensors for detecting an ambient field generated by said EHT generator and picked up by said conductive pads;

    a processor circuit for detecting a change in the ambient field when one of said conductive pads is contacted by an object;

    a conductive band around said CRT; and

    a high resistivity material coupled between said band and said conductive pads, such that any static charge that builds up on said pads is discharged through said high resistivity material.

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