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; 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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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.
71 Citations
20 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; and estimating a touching force of the finger touching the capacitive touch screen display based on the estimated speed associated with the finger. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. 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; 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; 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. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A non-transitory computer-readable medium containing instructions executable by at least one processor, the non-transitory computer-readable medium comprising:
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one or more instructions for receiving first measurements, at multiple instances of time during a touch interval, of capacitance values of a capacitive touch screen display associated with an area in contact with a finger touching the capacitive touch screen display; one or more instructions for receiving second measurements, at the multiple instances of time, of a size of the area upon the capacitive touch screen display in contact with the finger touching the capacitive touch screen display; one or more instructions for determining a rate of change in the size of the area in contact with the finger with respect to time; and one or more instructions for estimating 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 with respect to time. - View Dependent Claims (17, 18, 19, 20)
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Specification