Interference monitoring with transmitter electrodes
First Claim
1. An input device comprising:
- a plurality of transmitter electrodes coupled to driving circuitry, wherein the driving circuitry is configured to transmit one or more sensing signals along a first transmitter electrode among the plurality of transmitter electrodes;
a receiver electrode coupled to a first sensing circuitry, wherein the first sensing circuitry is configured to obtain a first resulting signal from the receiver electrode in response to transmitting the one or more sensing signals along the first transmitter electrode among the plurality of transmitter electrodes, wherein the first resulting signal from the receiving electrode is configured for determining positional information regarding an input object located in a sensing region of the input device;
a second sensing circuitry coupled to a second transmitter electrode different from the first transmitter electrode among the plurality of transmitter electrodes,wherein the second sensing circuitry is configured for determining an amount of interference based on a second resulting signal that is obtained from the second transmitter electrode, andwherein the second resulting signal used for determining the amount of interference is obtained from the second transmitter electrode while the one or more sensing signals are transmitted along the first transmitter electrode; and
a filtering circuitry coupled to the second sensing circuitry, wherein the filtering circuitry is configured for removing a portion of the amount of interference from the first resulting signal.
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Accused Products
Abstract
A method of capacitive sensing may include transmitting a first sensing signal along a first transmitter electrode among various transmitter electrodes of an input device. The method may further include obtaining, using various receiver electrodes in the input device, a first resulting signal in response to the first sensing signal being transmitted along the first transmitter electrode. The method may further include obtaining a second resulting signal from a second transmitter electrode among the transmitter electrodes. The method may further include determining, using the second resulting signal, interference along the second transmitter electrode. The method may further include adjusting, using the interference along the second transmitter electrode, the first resulting signal to produce an adjusted resulting signal. The method may further include determining, using the adjusted resulting signal, positional information regarding a location of an input object in a sensing region of the input device.
28 Citations
20 Claims
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1. An input device comprising:
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a plurality of transmitter electrodes coupled to driving circuitry, wherein the driving circuitry is configured to transmit one or more sensing signals along a first transmitter electrode among the plurality of transmitter electrodes; a receiver electrode coupled to a first sensing circuitry, wherein the first sensing circuitry is configured to obtain a first resulting signal from the receiver electrode in response to transmitting the one or more sensing signals along the first transmitter electrode among the plurality of transmitter electrodes, wherein the first resulting signal from the receiving electrode is configured for determining positional information regarding an input object located in a sensing region of the input device; a second sensing circuitry coupled to a second transmitter electrode different from the first transmitter electrode among the plurality of transmitter electrodes, wherein the second sensing circuitry is configured for determining an amount of interference based on a second resulting signal that is obtained from the second transmitter electrode, and wherein the second resulting signal used for determining the amount of interference is obtained from the second transmitter electrode while the one or more sensing signals are transmitted along the first transmitter electrode; and a filtering circuitry coupled to the second sensing circuitry, wherein the filtering circuitry is configured for removing a portion of the amount of interference from the first resulting signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A processing system coupled with an input device, comprising:
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a sensor module, the sensor module configured to; transmit a first sensing signal along a first transmitter electrode among a plurality of transmitter electrodes of the input device, obtain, using a receiver electrode from a plurality of receiver electrodes in the input device, a first resulting signal in response to the first sensing signal being transmitted along the first transmitter electrode among the plurality of transmitter electrodes, and obtain a second resulting signal from a second transmitter electrode different from the first transmitter electrode among the plurality of transmitter electrodes while the first sensing signal is transmitted along the first transmitter electrode; and a determination module, the determination module configured to; determine, using the second resulting signal, an amount of interference along the second transmitter electrode, adjust, using the amount of interference, the first resulting signal to produce an adjusted resulting signal, wherein a portion of the amount of interference is removed from the adjusted resulting signal, and determine, using the adjusted resulting signal, positional information regarding a location of an input object in a sensing region of the input device. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A method of capacitive sensing, comprising:
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transmitting a first sensing signal along a first transmitter electrode among a plurality of transmitter electrodes of an input device; obtaining, using a plurality of receiver electrodes in the input device, a first resulting signal in response to the first sensing signal being transmitted along the first transmitter electrode among the plurality of transmitter electrodes; obtaining a second resulting signal from a second transmitter electrode different from the first transmitter electrode among the plurality of transmitter electrodes while the first sensing signal is transmitted along the first transmitter electrode; determining, using the second resulting signal, interference along the second transmitter electrode; adjusting, using the interference along the second transmitter electrode, the first resulting signal to produce an adjusted resulting signal; and determining, using the adjusted resulting signal, positional information regarding a location of an input object in a sensing region of the input device. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification