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Touch sensor with linearized response

  • US 7,227,538 B2
  • Filed: 02/25/2004
  • Issued: 06/05/2007
  • Est. Priority Date: 02/25/2004
  • Status: Expired due to Fees
First Claim
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1. A touch sensor comprising:

  • an electrically resistive film covering a touch sensitive area;

    two or more substantially parallel polygonal rows of electrically conductive segments separated by gaps disposed on the resistive film and surrounding the touch sensitive area, each edge of each row having one or more middle electrically conductive segments disposed between two end electrically conductive segments, a first middle conductive segment in one of the rows fully overlapping a second middle conductive segment in an adjacent row, the overlapping portions of the first and second middle conductive segments defining a full overlap region; and

    a first discrete electrically insulative segment disposed in the resistive film in the full overlap region to increase electrical resistance between the first and second middle conductive segments.

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