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Device and method for force and proximity sensing employing an intermediate shield electrode layer

  • US 9,632,638 B2
  • Filed: 09/10/2014
  • Issued: 04/25/2017
  • Est. Priority Date: 09/10/2014
  • Status: Active Grant
First Claim
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1. An input device for an electronic system, comprising:

  • a pliable component having an input surface and a first plurality of sensor electrodes, the first plurality of sensor electrodes comprising a first subset characterized by a first geometric pattern and a second subset characterized by a second geometric pattern;

    a support substrate spaced apart from the pliable component;

    a second plurality of sensor electrodes disposed on a second substrate;

    a spacing layer disposed between the pliable component and the support substrate, the spacing layer configured to locally deform in response to a force applied to the input surface; and

    a shield electrode layer;

    disposed between the first plurality of sensor electrodes and the second plurality of sensor electrodes;

    comprising an array of conductive segments overlaying the first geometric pattern and an array of voids overlaying the second geometric pattern; and

    configured to electrically shield the first plurality of sensor electrodes from the second plurality of sensor electrodes so that a touch image measured is substantially independent of the force applied to the input surface.

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