Touch detection using multiple simultaneous stimulation signals

A method for obtaining a plurality of values used to generate one or more images of touch, comprising:

• simultaneously applying, during a first frame, a plurality of first stimulation signals to a plurality of drive lines of touch sensor circuitry, wherein the plurality of first stimulation signals include signals having a first stimulation frequency and multiple stimulation phases;
• receiving a first sense signal from each of a plurality of sense lines of the touch sensor circuitry into one or more sense channels;
• demodulating the first sense signals with one or more first demodulation signals, wherein the one or more first demodulation signals have a first demodulation frequency, wherein the first demodulation frequency is based on the first stimulation frequency, and wherein the one or more first demodulation signals have multiple demodulation phases that are based on the multiple first stimulation phases;
• simultaneously applying, during a second frame, a plurality of second stimulation signals to the plurality of drive lines of the touch sensor circuitry, wherein the plurality of second stimulation signals include signals having a second stimulation frequency and multiple stimulation phases;
• receiving a second sense signal from each of the plurality of sense lines of the touch sensor circuitry into the one or more sense channels;
• and
• demodulating the second sense signals with one or more second demodulation signals, wherein the one or more second demodulation signals have a second demodulation frequency, wherein the second demodulation frequency is based on the second stimulation frequency, wherein the one or more second demodulation signals have multiple demodulation phases that are based on the multiple second stimulation phases, and wherein the first stimulation frequency is different than the second stimulation frequency.

A non-transitory computer readable storage medium storing instructions, that when executed by a processor, performs a method comprising:

• simultaneously applying, during a first frame, a plurality of first stimulation signals to a plurality of drive lines of touch sensor circuitry, wherein the plurality of first stimulation signals include signals having a first stimulation frequency and multiple stimulation phases;
• receiving a first sense signal from each of a plurality of sense lines of the touch sensor circuitry into one or more sense channels;
• demodulating the first sense signals with one or more first demodulation signals, wherein the one or more first demodulation signals have a first demodulation frequency, wherein the first demodulation frequency is based on the first stimulation frequency, and wherein the one or more first demodulation signals have multiple demodulation phases that are based on the multiple first stimulation phases;
• simultaneously applying, during a second frame, a plurality of second stimulation signals to the plurality of drive lines of the touch sensor circuitry, wherein the plurality of second stimulation signals include signals having a second stimulation frequency and multiple stimulation phases;
• receiving a second sense signal from each of the plurality of sense lines of the touch sensor circuitry into the one or more sense channels;
• and
• demodulating the second sense signals with one or more second demodulation signals, wherein the one or more second demodulation signals have a second demodulation frequency, wherein the second demodulation frequency is based on the second stimulation frequency, wherein the one or more second demodulation signals have multiple demodulation phases that are based on the multiple second stimulation phases, and wherein the first stimulation frequency is different than the second stimulation frequency.