×

Touch screen touch force measurement based on finger deformation speed

  • US 9,489,096 B2
  • Filed: 12/23/2014
  • Issued: 11/08/2016
  • Est. Priority Date: 12/23/2014
  • Status: Active Grant
First Claim
Patent Images

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;

    measuring, at the multiple instances of time during the touch interval, an acoustic intensity of the finger touching the capacitive touch screen display;

    determining an initial estimate of touch force based on the measured acoustic intensity; and

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

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×