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Input device and method with pressure-sensitive layer

  • US 9,383,881 B2
  • Filed: 06/02/2010
  • Issued: 07/05/2016
  • Est. Priority Date: 06/03/2009
  • Status: Active Grant
First Claim
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1. A pressure sensitive input device for sensing an input object in a sensing region, comprising:

  • a plurality of sensor electrodes comprising;

    a set of primary sensor electrodes; and

    a set of secondary sensor electrodes, each of the primary sensor electrodes being electrically coupled to and disposed at a fixed distance from at least one of the secondary sensor electrodes to form a set of measurable admittances between each primary sensor electrode and secondary sensor electrode, respectively;

    a touch surface; and

    a pressure-sensitive layer located between the touch surface and both the set of primary sensor electrodes and the set of secondary sensor electrodes, the pressure-sensitive layer configured to change at least one of the measurable admittances, without changing the fixed distance between each primary sensor electrode and each corresponding secondary sensor electrode, in response to pressure applied to the touch surface.

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