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US 10,761,659 B2Granted
Mitigating electromagnetic emissions from sensor electrodes
AssigneeSynaptics Incorporated
InventorPetr Shepelev
Life of this patent
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Abstract
An input device is disclosed. The input device includes: multiple sensor electrodes; and a processing system configured to: modulate a first sensor electrode of the multiple sensor electrodes with a guard signal; and mitigate electromagnetic emissions resulting from modulating the first sensor electrode with the guard signal by modulating a circuit element with an inverted version of the guard signal.
Claims21
A processing system, comprising:
- first circuitry configured to modulate a first sensor electrode of a plurality of sensor electrodes with a guard signal,
- wherein the plurality of sensor electrodes is arranged in a sensing region;
- and
- second circuitry configured to mitigate electromagnetic emissions of the sensing region, the electromagnetic emissions resulting from modulating the first sensor electrode with the guard signal,
- wherein the mitigation is performed by modulating a circuit element with an inverted version of the guard signal.
2 more elements
A method comprising:
- modulating a plurality of sensor electrodes arranged in a sensing region with a sensing signal;
- applying a guard signal to a gate line associated with a display screen;
- and
- reducing, by modulating a conductive path with an inverted version of the guard signal, electromagnetic emissions of the sensing region, the electromagnetic emissions resulting from both modulating the plurality of sensor electrodes with the sensing signal and applying the guard signal to the gate line,
- wherein the conductive path at least partially surrounds the plurality of sensor electrodes.
2 more elements
A method associated with a processing system, the method comprising:
- modulating a first sensor electrode disposed in a sensing region with a guard signal;
- and
- reducing electromagnetic emissions of the sensing region, the electromagnetic emissions resulting from modulating the first sensor electrode with the guard signal,
- wherein the mitigation is performed by modulating a second sensor electrode with an inverted version of the guard signal.
1 more element
An input device, comprising:
- a plurality of sensor electrodes arranged in a sensing region;
- and
- a processing system configured to:
- modulate a first sensor electrode of the plurality of sensor electrodes with a guard signal;
- and
- mitigate electromagnetic emissions of the sensing region resulting from modulating the first sensor electrode with the guard signal,
- wherein the mitigation is performed by modulating a circuit element with an inverted version of the guard signal.
4 more elements
Dependencies are inferred from the claim text.