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Capacitive Touchscreen or Touchpad for Finger or Stylus

  • US 20100026655A1
  • Filed: 07/31/2008
  • Published: 02/04/2010
  • Est. Priority Date: 07/31/2008
  • Status: Abandoned Application
First Claim
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1. A mutual capacitance combined finger and stylus sensing touchscreen or touchpad, comprising:

  • a lower substrate having a first plurality of electrodes disposed substantially in a first plane in rows or columns positioned thereupon or therein, the lower substrate being substantially rigid and inflexible, andan upper downwardly deflectable upper substrate located above the lower substrate and operatively configured in association therewith, the upper substrate having an upper touch surface forming a portion thereof or disposed thereover, the upper substrate further comprising a second plurality of electrodes disposed substantially in a second plane and in rows or columns positioned thereupon or therein;

    wherein the upper and lower substrates form opposing substantially planar and substantially parallel surfaces when the upper substrate is in a non-deflected position, the outer touch surface is configured for a user to place at least one finger or a stylus thereon and move the finger or the stylus thereacross, the first and second pluralities of electrodes form an electrode array configured to permit at least one location corresponding to the finger on the outer touch surface, or the stylus on the outer touch surface when the upper substrate is deflected downwardly towards the lower substrate by the stylus having a downward pressure applied thereto, to be detected by the array.

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