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System and method for determining object information using an estimated rigid motion response

  • US 8,618,428 B2
  • Filed: 12/14/2010
  • Issued: 12/31/2013
  • Est. Priority Date: 12/14/2010
  • Status: Active Grant
First Claim
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1. A capacitive sensor device comprising:

  • an input surface contactable by objects in a sensing region;

    at least one sensing electrode configured to capacitively couple with objects in the sensing region; and

    a processing system communicatively coupled to the at least one sensing electrode, the processing system configured to;

    obtain a set of sensor values using the at least one sensing electrode;

    determine an estimated rigid motion response associated with a substantially rigid motion of the at least one sensing electrode using the set of sensor values, the substantially rigid motion caused by at least one object in contact with the input surface, wherein the processing system, when determining the estimated rigid motion response, at least partially accounts for effects of capacitive coupling between the at least one sensor electrode and the at least one object in contact with the input surface; and

    determine object information using the estimated rigid motion response, the object information being related to the at least one object in contact with the input surface.

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