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Resistive touchscreen having multiple selectable regions for pressure discrimination

  • US 5,815,141 A
  • Filed: 04/12/1996
  • Issued: 09/29/1998
  • Est. Priority Date: 04/12/1996
  • Status: Expired due to Fees
First Claim
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1. A resistive position touchscreen for providing information as to a point of touch by an object, and selectively discriminating against contact of other objects, said resistive position touchscreen comprising:

  • first and second closely spaced and separated sheets, said first and second sheets contacting each other at a point when touched by an object at that point, at least one of said first and second sheets divided into a plurality of electrically separated regions;

    a resistive layer applied to at least one of said first and second sheets on a surface facing another of said first and second sheets, said resistive layer having a selected substantially uniform resistivity throughout said resistive layer;

    field generating means connected to opposite edges of said resistive layer for producing electrical fields in said resistive layer;

    a circuit means for applying voltages in proper timed sequence to said field generating means, and for receiving and analyzing signals from said plurality of separated regions to ascertain information as to a point of touch; and

    a switch means connected to each of said separated regions to selectively connect at least one of said separated regions with said circuit means whereby a selected portion of said resistive layer is active for providing information as to the position of touch of the object.

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