Capacitive side position extrapolation
First Claim
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1. A processing system, comprising:
- sensor circuitry configured to;
drive sensing signals on a plurality of sensor electrodes of a sensing region, the sensing region comprising a surface sensing region,acquire a mutual capacitive measurement comprising effects of the sensing signals, andacquire a first absolute capacitive measurement comprising effects of the sensing signals; and
processing circuitry configured to;
perform a first comparison of the mutual capacitive measurement and the first absolute capacitive measurement to obtain a comparison value,determine whether the comparison value exceeds a first threshold, anddetect, in response to determining that the comparison value exceeds the first threshold, a presence of an input object proximate to a side surface of an input device.
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Abstract
A method for capacitive sensing includes acquiring a mutual capacitive measurement including effects of sensing signals of a sensing region, and acquiring an absolute capacitive measurement including effects of the sensing signals. The method further includes performing a comparison of the mutual capacitive measurement and the absolute capacitive measurement, and detecting a presence of an input object proximate to a side surface of an input device based on the comparison. The side surface is at least substantially orthogonal to the sensing region on the input device. The method further includes reporting the presence of the input object.
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Citations
20 Claims
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1. A processing system, comprising:
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sensor circuitry configured to; drive sensing signals on a plurality of sensor electrodes of a sensing region, the sensing region comprising a surface sensing region, acquire a mutual capacitive measurement comprising effects of the sensing signals, and acquire a first absolute capacitive measurement comprising effects of the sensing signals; and processing circuitry configured to; perform a first comparison of the mutual capacitive measurement and the first absolute capacitive measurement to obtain a comparison value, determine whether the comparison value exceeds a first threshold, and detect, in response to determining that the comparison value exceeds the first threshold, a presence of an input object proximate to a side surface of an input device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for capacitive sensing comprising:
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acquiring a mutual capacitive measurement comprising effects of sensing signals of a sensing region comprising a surface sensing region; acquiring a first absolute capacitive measurement comprising effects of the sensing signals; performing a first comparison of the mutual capacitive measurement and the first absolute capacitive measurement to obtain a comparison value; determining whether the comparison value exceeds a first threshold; and detecting, in response to determining that the comparison value exceeds the first threshold, a presence of an input object proximate to a side surface of an input device. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An input device for capacitive sensing comprising:
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a plurality of sensor electrodes for receiving resulting signals from sensing signals; and a processing system configured to; acquire a mutual capacitive measurement using the resulting signals; acquire an absolute capacitive measurement using the resulting signals; perform a comparison of the mutual capacitive measurement and the absolute capacitive measurement to obtain a comparison value; and determine whether the comparison value based on the mutual capacitive measurement and the absolute capacitive measurement exceeds a threshold; detect, in response to determining that the comparison value exceeds the threshold, a presence of an input object proximate to a side surface of an input device. - View Dependent Claims (18, 19, 20)
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Specification