Display guarding techniques

A method for mitigating an effect of a coupling capacitance associated with a display electrode when performing capacitive sensing, the method comprising:

• driving a modulated signal onto a first sensor electrode of a plurality of sensor electrodes to detect a change in capacitive coupling between an input object and the first sensor electrode during a first period;
• and
• driving a guarding signal onto the display electrode to mitigate the effect of the coupling capacitance between the first sensor electrode and the display electrode during the first period,
• wherein the modulated signal and guarding signal have a similar characteristic such that a voltage difference between the first sensor electrode and the display electrode remains constant during the first period.

A processing system for an input device comprising:

• a display driver module comprising display driver circuitry coupled to at least one display electrode and configured to:
• drive the at least one display electrode to set a voltage associated with a pixel of a display device, and
• drive a guarding signal onto the at least one display electrode to mitigate the effect of the coupling capacitance between a first sensor electrode of a plurality of sensor electrodes and the at least one display electrode during a first time period and wherein, during the first time period, the first sensor electrode is driven with a modulated signal to detect a change in capacitance between the first sensor electrode and an input object,
• wherein the modulated signal and the guarding signal have a similar characteristic such that a voltage difference between the first sensor electrode and the at least one display electrode remains constant during the first period.