MITIGATING INTERFERENCE IN CAPACITANCE SENSING
First Claim
1. A processing system for capacitive sensing, the processing system comprising functionality for:
- obtaining, based on resulting signals, first capacitive sensor data by performing capacitance sensing with a first plurality of sensor electrodes and a transmitter electrode, the first plurality of sensor electrodes configured to receive the resulting signals from the transmitter electrode;
obtaining a first profile using the first plurality of sensor electrodes, the first profile being along a receiver axis of the capacitance sensing;
estimating a first interference measurement based on the first profile, the first interference measurement corresponding to interference;
mitigating effects of the interference in the first capacitive sensor data using the interference measurement to obtain second capacitive sensor data; and
determining positional information of an input object in a sensing region using the second capacitive sensor data.
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Accused Products
Abstract
A processing system for capacitive sensing includes functionality for obtaining, based on resulting signals, first capacitive sensor data by performing capacitance sensing with sensor electrodes and a transmitter electrode, the sensor electrodes configured to receive the resulting signals from the transmitter electrode. The processing system further includes functionality for obtaining a profile using the sensor electrodes, estimating an interference measurement based on the first profile. The profile is along a receiver axis of the capacitance sensing, and the interference measurement corresponds to interference. The effects of the interference are mitigated in the first capacitive sensor data using the interference measurement to obtain second capacitive sensor data, and positional information of an input object in a sensing region is determined using the second capacitive sensor data.
17 Citations
20 Claims
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1. A processing system for capacitive sensing, the processing system comprising functionality for:
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obtaining, based on resulting signals, first capacitive sensor data by performing capacitance sensing with a first plurality of sensor electrodes and a transmitter electrode, the first plurality of sensor electrodes configured to receive the resulting signals from the transmitter electrode; obtaining a first profile using the first plurality of sensor electrodes, the first profile being along a receiver axis of the capacitance sensing; estimating a first interference measurement based on the first profile, the first interference measurement corresponding to interference; mitigating effects of the interference in the first capacitive sensor data using the interference measurement to obtain second capacitive sensor data; and determining positional information of an input object in a sensing region using the second capacitive sensor data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for mitigating interference in capacitance sensing, the method comprising:
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obtaining, based on resulting signals, first capacitive sensor data by performing capacitance sensing with a first plurality of sensor electrodes and a transmitter electrode, the first plurality of sensor electrodes configured to receive the resulting signals from the transmitter electrode; obtaining a first profile using the first plurality of sensor electrodes, the first profile being along a receiver axis of the capacitance sensing; estimating a first interference measurement based on the first profile, the first interference measurement corresponding to interference; mitigating effects of the interference in the first capacitive sensor data using the interference measurement to obtain second capacitive sensor data; and determining positional information of an input object in a sensing region using the second capacitive sensor data. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. An input device for capacitive sensing comprising:
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a first plurality of sensor electrodes for receiving resulting signals from a transmitter electrode; and a processing system configured to; obtain, based on the resulting signals, first capacitive sensor data by performing capacitance sensing with the first plurality of sensor electrodes and a transmitter electrode; obtaining a first profile using the first plurality of sensor electrodes, the first profile being along a receiver axis of the capacitance sensing; estimating a first interference measurement based on the first profile, the first interference measurement corresponding to interference; mitigating effects of the interference in the first capacitive sensor data using the interference measurement to obtain second capacitive sensor data; and determining positional information of an input object in a sensing region using the second capacitive sensor data. - View Dependent Claims (19, 20)
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Specification