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TOUCH SCREEN TOUCH FORCE MEASUREMENT BASED ON FINGER DEFORMATION SPEED

  • US 20160179245A1
  • Filed: 12/23/2014
  • Published: 06/23/2016
  • Est. Priority Date: 12/23/2014
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • measuring, at multiple instances of time during a touch interval, capacitance values of a capacitive touch screen display associated with an area in contact with a finger touching the capacitive touch screen display;

    determining, at the multiple instances of time, a size of the area upon the capacitive touch screen display in contact with the finger touching the capacitive touch screen display;

    determining a rate of change in the size of the area in contact with the finger with respect to time;

    estimating a speed associated with the finger based on the determined rate of change in the size of the area; and

    estimating a touching force of the finger touching the capacitive touch screen display based on the estimated speed associated with the finger.

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