Position-sensing and force detection panel

  • US 10,146,351 B2
  • Filed: 12/28/2015
  • Issued: 12/04/2018
  • Est. Priority Date: 12/02/2010
  • Status: Active Grant
First Claim
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1. An apparatus, comprising:

  • a control unit comprising a voltage driver and an integrator circuit, the voltage driver operable to provide an alternating voltage;

    a touch sensing panel operable to communicate with the control unit;

    a first variable resistance element coupled to an output of the voltage driver and an input of the integrator circuit, wherein the integrator circuit is operable to measure a parameter of the first variable resistance element over a period of time, and wherein the first variable resistance element is operable to be driven by the alternating voltage provided by the voltage driver; and

    circuitry operable to determine, based on the measured parameter, an amount of force applied to a sensing area of the touch sensing panel.

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