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Touch panel system and method

  • US 4,293,734 A
  • Filed: 02/23/1979
  • Issued: 10/06/1981
  • Est. Priority Date: 02/23/1979
  • Status: Expired due to Term
First Claim
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1. In an apparatus for locating a selected touch point on a current-conducting impedance surface having at least a pair of boundaries, the improvement comprisingmeans for linearizing current flow to said boundaries,means for causing a linearized electrical current to flow through said selected touch point as the sum of separate currents passing through each of said boundaries, andmeans for translating said separate currents to at least one signal corresponding to the location of said selected touch point relative to said boundaries.

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