Systems and methods for determining user input using simultaneous transmission from multiple electrodes

1. A processing system for an input device comprising:

a sensor module comprising sensor circuitry, the sensor module configured to:

simultaneously transmit a first transmitter signal with a first transmitter electrode and a second transmitter signal with a second transmitter electrode, wherein the first transmitter signal corresponds to an upper sideband and the second transmitter signal corresponds to a lower sideband; and

receive a resulting signal with a receiver electrode, wherein the resulting signal comprises effects corresponding to both the first transmitter signal and the second transmitter signal; and

a determination module configured to:

demodulate the resulting signal to produce a first output signal and a second output signal;

determine positional information for an input object based on at least one of the first output signal and the second output signal.

2. The processing system of claim 1 wherein the determination module is configured to determine the positional information for the input object based on at least one of the first output signal and the second output signal by:

determining a first measurement of change in capacitive coupling between the first transmitter electrode and the receiver electrode based at least in part on first output signal;

determining a second measurement of change capacitive coupling between the second transmitter electrode and the receiver electrode based at least in part on the second output signal; and

determining the positional information for the input object based on at least one of the first measurement and the second measurement.

3. The processing system of claim 1 wherein the determination module is further configured to:

demodulate the resulting signal to produce a third output signal and a fourth output signal, the third output signal is in quadrature with the first output signal and the fourth output signal is in quadrature with the second output signal.

4. The processing system of claim 3 wherein the determination module is further configured to:

determine first interference information for the first transmitter signal based on the third output signal and determine second interference information for the second transmitter signal based on the fourth output signal.

5. The processing system of claim 4 wherein the determination module is further configured to:

shift from simultaneously transmitting the first transmitter signal with the first transmitter electrode and the second transmitter signal with the second transmitter electrode to simultaneously transmitting a third transmitter signal with the first transmitter electrode and a fourth transmitter signal with the second transmitter signal based on at least one of the first interference information and the second interference information.

6. The processing system of claim 1 wherein:

the sensor module is further configured to:

simultaneously transmit with the first transmitter signal, a third transmitter signal with a third transmitter electrode and a fourth transmitter signal with a fourth transmitter electrode, wherein the third transmitter signal is in quadrature with the first transmitter signal and corresponds to the upper sideband and the fourth transmitter signal is in quadrature with the second transmitter signal and corresponds to the lower sideband; and

wherein the resulting signal further comprises effects corresponding to the third transmitter signal and the fourth transmitter signal; and

wherein the determination module is further configured to:

demodulate the resulting signal to produce a third output signal and a fourth output signal; and

determine the positional information for the input object further based on at least one of the third output signal and the fourth output signal.

7. The processing system of claim 6 wherein the determination module comprises a first quadrature demodulator corresponding to the first transmitter signal and the third transmitter signal and a second quadrature demodulator corresponding to the second transmitter signal and the fourth transmitter signal.

8. The processing system of claim 1 wherein the processing system is configured to determine a capacitive image based at least in part on the first output signal and the second output signal.

9. A processing system for an input device comprising:

a sensor module comprising sensor circuitry, the sensor module configured to:

simultaneously transmit a first transmitter signal with a first transmitter electrode and a second transmitter signal with a second transmitter electrode, wherein the first transmitter signal is in quadrature with the second transmitter signal; and

receive a resulting signal with a receiver electrode, wherein the resulting signal comprises effects corresponding to both the first transmitter signal and the second transmitter signal; and

a determination module configured to:

demodulate the resulting signal to produce a first output signal and a second output signal;

determine positional information for an input object based on at least one of the first output signal and the second output signal.

10. The processing system of claim 9 wherein the determination module is configured to determine the positional information for the input object based on at least one of the first output signal and the second output signal by:

determining a first measurement of change in capacitive coupling between the first transmitter electrode and the receiver electrode based at least in part on first output signal;

determining a second measurement of change in capacitive coupling between the second transmitter electrode and the receiver electrode based at least in part on the second output signal; and

determining the positional information for the input object based on at least one of the first measurement and the second measurement.

11. The processing system of claim 9 wherein demodulating the resulting signal to produce the first output signal and a second output signal comprises demodulating the resulting signal to produce the first output signal, the second output signal and a third output signal.

12. The processing system of claim 11 wherein the determination module is further configured to:

determine interference information of a third transmitter signal based on the third output signal.

13. The processing system of claim 12 wherein the sensor module is further configured to:

shift from simultaneously transmitting the first transmitter signal with a first transmitter electrode and a second transmitter signal with a second transmitter electrode to simultaneously transmitting the third transmitter signal with the first transmitter electrode and one of the second transmitter signal or a fourth transmitter signal with the second transmitter electrode.

14. The processing system of claim 9 wherein the first transmitter signal corresponds to an upper sideband, and wherein;

the sensor module is further configured to:

simultaneously transmit with the first transmitter signal, a third transmitter signal with a third transmitter electrode and a fourth transmitter signal with a fourth transmitter electrode, wherein the third transmitter signal corresponds to a lower sideband and the fourth transmitter signal is in quadrature with the third transmitter signal; and

wherein the resulting signal further comprises effects corresponding to the third transmitter signal and the fourth transmitter signal; and

wherein the determination module is further configured to:

demodulate the resulting signal to produce a third output signal and a fourth output signal; and

determine the positional information for the input object further based on at least one of the third output signal and the fourth output signal.

15. The processing system of claim 14 wherein the determination module comprises a first quadrature demodulator for processing the first transmitter signal and the second transmitter signal and a second quadrature demodulator for processing the third transmitter signal and the fourth transmitter signal.

16. The processing system of claim 9 wherein the processing system is configured to determine a capacitive image based at least in part on the first output signal and the second output signal.

17. An input device comprising:

a first transmitter electrode and a second transmitter electrode;

a receiver electrode;

a processing system operatively coupled to the first transmitter electrode, the second transmitter electrode, and the receiver electrode, the processing system configured to:

simultaneously transmit a first transmitter signal with the first transmitter electrode, a second transmitter signal with the second transmitter electrode, wherein the first transmitter signal corresponds to an upper sideband, and wherein the second transmitter signal corresponds to a lower sideband;

receive a resulting signal with the receiver electrode, wherein the resulting signal comprises effects corresponding to each of the first transmitter signal and the second transmitter signal;

demodulate the resulting signal to produce a first output signal and a second output signal;

determine a first measurement of change of capacitive coupling between the first transmitter electrode and the receiver electrode based at least in part on first output signal;

determine a second measurement of change of capacitive coupling between the second transmitter electrode and the receiver electrode based at least in part on the second output signal; and

determine positional information for an input object based on at least in part the first measurement and the second measurement.

18. The input device of claim 17 wherein the processing system is configured to determine positional information for the input object based on at least in part the first measurement and the second measurement by determining a capacitive image based on at least in part the first measurement and the second measurement.

19. The input device of claim 17 wherein the processing system is further configured to:

demodulate the resulting signal to produce a third output signal and a fourth output signal, the third output signal is in quadrature with the first output signal and the fourth output signal is in quadrature with the second output signal; and

determine first interference information for the first transmitter signal based on the third output signal and determine second interference information for the second transmitter signal based on the fourth output signal.

20. The input device of claim 19 wherein the processing system is further configured to:

shift from simultaneously transmitting the first transmitter signal with the first transmitter electrode and the second transmitter signal with the second transmitter electrode to simultaneously transmitting a third transmitter signal with the first transmitter electrode and a fourth transmitter signal with the second transmitter signal based on at least one of the first interference information and the second interference information.

21. The input device of claim 17 wherein the processing system is further configured to:

simultaneously transmit with the first transmitter signal, a third transmitter signal with a third transmitter electrode and a fourth transmitter signal with a fourth transmitter electrode, wherein the third transmitter signal is in quadrature with the first transmitter signal and corresponds to the upper sideband and the fourth transmitter signal is in quadrature with the second transmitter signal and corresponds to the lower sideband; and

wherein the resulting signal further comprises effects corresponding to the third transmitter signal and the fourth transmitter signal; and

demodulate the resulting signal to produce a third output signal and a fourth output signal; and

determine the positional information for the input object further based on at least one of the third output signal and the fourth output signal.

22. An input device comprising:

a first transmitter electrode, a second transmitter electrode, a third transmitter electrode, and a fourth transmitter electrode;

a receiver electrode;

a processing system operatively coupled to the first transmitter electrode, the second transmitter electrode, the third transmitter electrode, the fourth transmitter electrode, and the receiver electrode, the processing system configured to:

simultaneously transmit a first transmitter signal with the first transmitter electrode, a second transmitter signal with the second transmitter electrode, a third transmitter signal with the third transmitter electrode, and a fourth transmitter signal with the fourth transmitter electrode, wherein the first transmitter signal and the third transmitter signal correspond to an upper sideband, and the second transmitter signal and the fourth transmitter signal corresponds to a lower sideband, and wherein the first transmitter signal is in quadrature with the third transmitter signal and the second transmitter signal is in quadrature with the fourth transmitter signal;

receive a resulting signal with the receiver electrode, wherein the resulting signal comprises effects corresponding to each of the first transmitter signal, the second transmitter signal, the third transmitter signal and the fourth transmitter signal;

demodulate the resulting signal to produce a first output signal, a second output signal, a third output signal, and a fourth output signal; and

determine a first measurement of change of capacitive coupling between the first transmitter electrode and the receiver electrode based at least in part on first output signal;

determine a second measurement of change of capacitive coupling between the second transmitter electrode and the receiver electrode based at least in part on the second output signal;

determine a third measurement of change of capacitive coupling between the third transmitter electrode and the receiver electrode based at least in part on third output signal;

determine a fourth measurement of change of capacitive coupling between the fourth transmitter electrode and the receiver electrode based at least in part on the fourth output signal;

determine positional information for an input object based on at least in part the first measurement, the second measurement, the third measurement and the fourth measurement.

23. The input device of claim 22 wherein the processing system is configured to determine positional information for the input object based on at least in part the first measurement, the second measurement, the third measurement and the fourth measurement by determining a capacitive image based on at least in part the first measurement, the second measurement, the third measurement and the fourth measurement.