Touch screen touch force measurement based on finger deformation speed
First Claim
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.
3 Assignments
0 Petitions
Accused Products
Abstract
A device includes a capacitive sampling unit that measures, at the 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. The device further includes a touch deformation area unit that determines, 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. The device also includes a touch force estimation unit that determines a rate of change in the size of the area in contact with the finger, and estimates a touching force of the finger touching the capacitive touch screen display based on the determined rate of change in the size of the area.
6 Citations
11 Claims
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1. A method, comprising:
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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 Dependent Claims (2, 3, 4, 5)
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6. A device, comprising:
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a capacitive touch screen display; a capacitive sampling unit configured to measure, at the multiple instances of time during a touch interval, capacitance values of the capacitive touch screen display associated with an area in contact with an object touching the capacitive touch screen display; a touch deformation area unit configured to determine, at the multiple instances of time, a size of the area upon the capacitive touch screen display in contact with the object touching the capacitive touch screen display; acoustic sensors adjacent the display; an acoustic measurement unit configured to measure, at the multiple instances of time during the touch interval, an acoustic intensity of the object touching the capacitive touch screen display; a touch force estimation unit configured to; determine a rate of change in the size of the area in contact with the object with respect to time; determine an initial estimate of touch force based on the measured acoustic intensity; and estimate a touching force of the object touching the capacitive touch screen display based on the determined rate of change of the size of the area with respect to time and the initial estimate of touch force. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification