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Determination of input from force sensing input device under an unbroken exterior portion of a device

  • US 9,791,930 B1
  • Filed: 04/22/2015
  • Issued: 10/17/2017
  • Est. Priority Date: 03/11/2013
  • Status: Active Grant
First Claim
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1. A device comprising:

  • an unbroken portion of an exterior of the device, the unbroken portion comprising a structure having an exterior surface and an interior surface;

    a force sensing resistor assembly comprising a first touch zone and a second touch zone, each zone configured to be responsive to an incident force, wherein the force sensing resistor assembly is proximate to at least a portion of the interior surface of the structure;

    a controller coupled to the force sensing resistor assembly, the controller configured to;

    determine a first magnitude of a first applied force at the first touch zone and a second magnitude of a second applied force at the second touch zone of the force sensing resistor assembly;

    sum the first magnitude and the second magnitude to generate a summed magnitude of applied force;

    determine that the summed magnitude of applied force exceeds a first threshold;

    based on the summed magnitude of applied force exceeding the first threshold, dynamically adjust the first threshold; and

    determine that one or more of a plurality of touch zones, which correspond with the first magnitude or the second magnitude, are activated.

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