Acquiring multiple capacitive partial profiles for interleaved capacitive sensing
First Claim
1. A processing system, comprising:
- a sensor module comprising sensor circuitry configured to couple with a first plurality of sensor electrodes and with a second plurality of sensor electrodes, the sensor module configured to;
drive, during a first time period, a first capacitive sensing signal onto a first sensor electrode of the first plurality of sensor electrodes and a substantially constant voltage onto a second sensor electrode of the first plurality of sensor electrodes;
acquire, during the first time period, a first capacitive partial profile based on the driven first capacitive sensing signal;
drive, during a second time period that is non-overlapping with the first time period, a second capacitive sensing signal onto the second sensor electrode and the substantially constant voltage onto the first sensor electrode;
acquire, during the second time period, a second capacitive partial profile based on the driven second capacitive sensing signal; and
drive, during at least one of the first time period and the second time period, one or more sensor electrodes of the second plurality of sensor electrodes with the substantially constant voltage.
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Accused Products
Abstract
Embodiments include a method, input device, and processing system for operating a plurality of sensor electrodes for capacitive sensing. The method includes acquiring a first capacitive partial profile by driving a first capacitive sensing signal onto a first sensor electrode of a first plurality of sensor electrodes while driving a second sensor electrode of the first plurality of sensor electrodes with a substantially constant voltage. The method further includes acquiring a second capacitive partial profile by driving a second capacitive sensing signal onto the second sensor electrode while driving the first sensor electrode with the substantially constant voltage, and determining a first capacitive profile based on at least the acquired first capacitive partial profile and the second capacitive partial profile.
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Citations
20 Claims
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1. A processing system, comprising:
a sensor module comprising sensor circuitry configured to couple with a first plurality of sensor electrodes and with a second plurality of sensor electrodes, the sensor module configured to; drive, during a first time period, a first capacitive sensing signal onto a first sensor electrode of the first plurality of sensor electrodes and a substantially constant voltage onto a second sensor electrode of the first plurality of sensor electrodes; acquire, during the first time period, a first capacitive partial profile based on the driven first capacitive sensing signal; drive, during a second time period that is non-overlapping with the first time period, a second capacitive sensing signal onto the second sensor electrode and the substantially constant voltage onto the first sensor electrode; acquire, during the second time period, a second capacitive partial profile based on the driven second capacitive sensing signal; and drive, during at least one of the first time period and the second time period, one or more sensor electrodes of the second plurality of sensor electrodes with the substantially constant voltage. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for driving sensor electrodes for capacitive sensing, the method comprising:
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acquiring, during a first time period and while driving a second sensor electrode of a first plurality of sensor electrodes with a substantially constant voltage, a first capacitive partial profile by driving a first capacitive sensing signal onto a first sensor electrode of the first plurality of sensor electrodes; acquiring, during a second time period that is non-overlapping with the first time period, a second capacitive partial profile by driving a second capacitive sensing signal onto the second sensor electrode while driving the first sensor electrode with the substantially constant voltage; driving, during at least one of the first time period and the second time period, one or more sensor electrodes of a second plurality of sensor electrodes with the substantially constant voltage; and determining a first capacitive profile based on at least the first capacitive partial profile and the second capacitive partial profile. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An input device comprising:
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a first plurality of sensor electrodes arranged along a first sensing axis; and a processing system coupled to the first plurality of sensor electrodes and configured to; acquire, during a first time period and while driving a second sensor electrode of the first plurality of sensor electrodes with a substantially constant voltage, a first capacitive partial profile by driving a first capacitive sensing signal onto a first sensor electrode of the first plurality of sensor electrodes; acquire, during a second time period that is non-overlapping with the first time period, a second capacitive partial profile by driving a second capacitive sensing signal onto the second sensor electrode while driving the first sensor electrode with the substantially constant voltage; and determine a first capacitive profile based on at least the first capacitive partial profile and the second capacitive partial profile. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification