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US 11,693,462 B2Granted
Central receiver for performing capacitive sensing
AssigneeSynaptics Incorporated
InventorsJoseph Kurth Reynolds, Stephen L. Morein
Life of this patent
Estimating the term…
Abstract
This disclosure generally provides an input device that includes multiple sensor and display electrodes and a processing system. The processing system includes a plurality of local receivers coupled to respective ones of the sensor electrodes, where the local receivers are configured to acquire first resulting signals from the sensor electrodes. The processing system also includes a central receiver coupled to the sensor electrodes and configured to acquire second resulting signals from each of the sensor electrodes.
Claims20
An input device, comprising:
- a plurality of sensor electrodes;
- and
- a processing system, comprising:
- a first receiver electrically coupled to the plurality of sensor electrodes, wherein the first receiver is configured to acquire first resulting signals from each of the plurality of sensor electrodes and determine, based on the first resulting signals, a first capacitive measurement representing a total capacitance value of the plurality of sensor electrodes;
- and
- a plurality of second receivers, separate from the first receiver, each coupled to a subset of the plurality of sensor electrodes, wherein the plurality of second receivers are configured to acquire second resulting signals from the subset of the plurality of sensor electrodes and determine a second capacitive measurement representing a localized capacitance value for the subset of the plurality of sensor electrodes,
- wherein the processing system is configured to mitigate an effect a grounding condition has on the second capacitive measurement using the first capacitive measurement.
4 more elements
A processing system comprising:
- a first receiver configured to be electrically coupled to a plurality of sensor electrodes and to acquire first resulting signals from each of the plurality of sensor electrodes and determine, based on the first resulting signals, a first capacitive measurement representing a total capacitance value of the plurality of sensor electrodes;
- and
- a plurality of second receivers, separate from the first receiver, configured to be coupled to a subset of the plurality of sensor electrodes and to acquire second resulting signals from the subset of the plurality of sensor electrodes and determine a second capacitive measurement representing a localized capacitance value for the subset of the plurality of sensor electrodes,
- wherein the processing system is configured to mitigate an effect a grounding condition has on the second capacitive measurement using the first capacitive measurement.
1 more element
A method, comprising:
- acquiring, from a first receiver electrically coupled to a plurality of sensor electrodes, first resulting signals from each of the plurality of sensor electrodes;
- determining, based on the first resulting signals, a first capacitive measurement representing a total capacitance value of the plurality of sensor electrodes;
- acquiring, from a plurality of second receivers, separate from the first receiver, each coupled to a subset of the plurality of sensor electrodes, second resulting signals from the subset of the plurality of sensor electrodes;
- determining, based on the second resulting signals, a second capacitive measurement representing a localized capacitance value for the subset of the plurality of sensor electrodes;
- and
- mitigating an effect a grounding condition has on the second capacitive measurement using the first capacitive measurement.
3 more elements
Dependencies are inferred from the claim text.