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Sensor signal conditioning in a force-based touch device

  • US 20060284856A1
  • Filed: 04/11/2006
  • Published: 12/21/2006
  • Est. Priority Date: 06/10/2005
  • Status: Abandoned Application
First Claim
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1. A method for estimating a touch location on a force-based input device, the force-based input device having a plurality of force sensors outputting a plurality of force sensor signals, the force sensor signals providing measurements of force transmitted to each force sensor by a touch force applied to the force-based input device, the method comprising:

  • summing the plurality of force sensor signals to form a total force signal;

    converting the total force signal to a scaling signal according to a predefined function;

    conditioning each of the plurality of force sensor signals individually to form a plurality of conditioned sensor signals, wherein each force sensor signal is multiplied by the scaling signal and integrated during a touch event; and

    estimating the touch location from the plurality of conditioned sensor signals.

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