Combining trans-capacitance data with absolute-capacitance data for touch force estimates
First Claim
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1. A method for obtaining force-based data associated with a touch event, the method comprising:
- driving a plurality of sensor electrodes in transcapacitive mode to obtain a plurality of transcapacitive measurements;
driving the plurality of sensor electrodes in absolute capacitive mode to obtain a plurality of absolute capacitive measurements; and
determining the force-based data based on differences between the plurality of transcapacitive measurements and the plurality of absolute capacitive measurements.
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Abstract
Techniques for obtaining force-based data of an input device are provided. The techniques include driving sensor electrodes in transcapacitive mode and in absolute capacitive mode, obtaining profiles for each of the modes, scaling the transcapacitive profile, and subtracting the scaled transcapacitive profile from the profile for absolute capacitive sensing. The result of this subtraction is force-based data that indicates the degree of force with that input object applies to the input device.
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Citations
20 Claims
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1. A method for obtaining force-based data associated with a touch event, the method comprising:
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driving a plurality of sensor electrodes in transcapacitive mode to obtain a plurality of transcapacitive measurements; driving the plurality of sensor electrodes in absolute capacitive mode to obtain a plurality of absolute capacitive measurements; and determining the force-based data based on differences between the plurality of transcapacitive measurements and the plurality of absolute capacitive measurements. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A processing system for obtaining force-based data associated with a touch event, the processing system comprising:
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sensing circuitry configured to; drive a plurality of sensor electrodes in transcapacitive mode to obtain a plurality of transcapacitive measurements, and drive the plurality of sensor electrodes in absolute capacitive mode to obtain a plurality of absolute capacitive measurements; and a determination processor configured to; determine the force-based data based on differences between the plurality of transcapacitive measurements and the plurality of absolute capacitive measurements. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An input device for obtaining force-based data associated with a touch event, the input device comprising:
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a plurality of sensor electrodes; and a processing system comprising; sensing circuitry configured to; drive a plurality of sensor electrodes in transcapacitive mode to obtain a plurality of transcapacitive measurements, and drive the plurality of sensor electrodes in absolute capacitive mode to obtain a plurality of absolute capacitive measurements; and a determination processor configured to; determine the force-based data based on differences between the plurality of transcapacitive measurements and the plurality of absolute capacitive measurements. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification