Method and system for dual node sensing
First Claim
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1. A system for a capacitive sensing device comprising:
- a plurality of transmitter electrodes configured to transmit transmitter signals;
a plurality of receiver electrodes configured to receive resulting signals comprising effects corresponding to the transmitter signals;
a plurality of dual nodes corresponding to a first capacitive coupling between the plurality of transmitter electrodes and the plurality of receiver electrodes, wherein the plurality of dual nodes are configured to determine a low ground mass measurement that describes a ground mass state of the capacitive sensing device; and
a plurality of primary nodes corresponding to a second capacitive coupling between the plurality of transmitter electrodes and the plurality of receiver electrodes,wherein the plurality of primary nodes are configured to determine a plurality of capacitive measurements that describe a location of an input object in a sensing region of the capacitive sensing device,wherein the first capacitive coupling is less than the second capacitive coupling.
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Abstract
A system for a capacitive sensing device includes transmitter electrodes configured to transmit transmitter signals, receiver electrodes configured to receive resulting signals including effects corresponding to the transmitter signals. The system further includes dual nodes corresponding to a first capacitive coupling between the transmitter electrodes and the receiver electrodes, and primary nodes corresponding to a second capacitive coupling between the transmitter electrodes and the receiver electrodes. The first capacitive coupling is less than the second capacitive coupling.
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Citations
18 Claims
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1. A system for a capacitive sensing device comprising:
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a plurality of transmitter electrodes configured to transmit transmitter signals; a plurality of receiver electrodes configured to receive resulting signals comprising effects corresponding to the transmitter signals; a plurality of dual nodes corresponding to a first capacitive coupling between the plurality of transmitter electrodes and the plurality of receiver electrodes, wherein the plurality of dual nodes are configured to determine a low ground mass measurement that describes a ground mass state of the capacitive sensing device; and a plurality of primary nodes corresponding to a second capacitive coupling between the plurality of transmitter electrodes and the plurality of receiver electrodes, wherein the plurality of primary nodes are configured to determine a plurality of capacitive measurements that describe a location of an input object in a sensing region of the capacitive sensing device, wherein the first capacitive coupling is less than the second capacitive coupling. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A processing system for a capacitive sensing device, comprising:
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a sensor module coupled to a plurality of transmitter electrodes, a plurality of receiver electrodes, a plurality of dual nodes corresponding to a first capacitive coupling between the plurality of transmitter electrodes and plurality of receiver electrodes, and a plurality of primary nodes corresponding to a second capacitive coupling between the plurality of transmitter electrodes and the plurality of receiver electrodes, wherein the sensor module configured to transmit a plurality of transmitter signals with the plurality of transmitter electrodes and receive, with the plurality of receiver electrodes, a first plurality of resulting signals and a second plurality of resulting signals; and a determination module configured to; acquire, using the plurality of dual nodes, a first capacitive measurement using the first plurality of resulting signals, wherein the plurality of dual nodes are configured to determine a low ground mass measurement that describes a ground mass state of the capacitive sensing device, acquire, using the plurality of primary nodes, a second capacitive measurement using the second plurality of resulting signals, wherein the plurality of primary nodes are configured to determine capacitive measurements that describe a location of an input object in a sensing region of the capacitive sensing device, determine a first low ground mass measurement based on the first capacitive measurement, adjust, using the first low ground mass measurement, the second capacitive measurement to generate an adjusted capacitive measurement, determine positional information based on the adjusted capacitive measurement, and report the positional information. - View Dependent Claims (12, 13)
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14. A capacitive input device comprising:
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a plurality of transmitter electrodes configured to transmit a plurality of transmitter signals; a plurality of receiver electrodes configured to receive resulting signals comprising effects corresponding to the plurality of transmitter signals; a plurality of dual nodes corresponding to a first capacitive coupling between the plurality of transmitter electrodes and the plurality of receiver electrodes; and a plurality of primary nodes corresponding to a second capacitive coupling between the plurality of transmitter electrodes and the plurality of receiver electrodes, wherein the second capacitive coupling is greater than the first capacitive coupling; and a processing system configured to; transmit the plurality of transmitter signals with the plurality of transmitter electrodes; receive, with the plurality of receiver electrodes, a first plurality of resulting signals and a second plurality of resulting signals; acquire a first capacitive measurement using the plurality of dual nodes and the first plurality of resulting signals, the first capacitive measurement, acquire a second capacitive measurement using the plurality of primary nodes and the second plurality of resulting signals, the second capacitive measurement, wherein the plurality of primary nodes are configured to determine capacitive measurements that describe a location of an input object in a sensing region of the capacitive sensing device determine, by the dual nodes, a first low ground mass measurement based on the first capacitive measurement, wherein the first low ground mass measurement describes a ground mass state of the capacitive sensing device, adjust, using the first low ground mass measurement, the second capacitive measurement to generate an adjusted capacitive measurement, determine positional information based on the adjusted capacitive measurement, and report the positional information. - View Dependent Claims (15, 16, 17, 18)
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Specification