Source driver touch transmitter in parallel with display drive

A method of capacitive sensing with a display device integrated with a capacitive sensing device having a sub-pixel, a first source line coupled to the sub-pixel, a first common electrode coupled to the sub-pixel, and a plurality of receiver electrodes, the method comprising:

• simultaneously updating the sub-pixel and driving the first common electrode for capacitive sensing by:
• driving the first source line with a first voltage to update the sub-pixel;
• driving the first common electrode for capacitive sensing by modulating the first common electrode between a second voltage and a third voltage;
• and
• shifting a value of the first voltage driven onto the first source line while the first common electrode is modulated between the second voltage and the third voltage by an amount equal to about a difference between the second voltage and the third voltage;
• receiving resulting signals with the receiver electrodes while the first common electrode is modulated between the second voltage and the third voltage;
• and
• determining positional information based on the resulting signals.

An input device comprising:

• a plurality of source lines;
• a plurality of common electrodes;
• and
• a processing system configured for coupling to a sub-pixel with a first source line of the plurality of source lines and a first common electrode of the plurality of common electrodes, wherein the processing system is configured to:
• update the sub-pixel by driving the first source line to a first voltage;
• drive the first common electrode for capacitive sensing by modulating the first common electrode between a second voltage and a third voltage while a gate line associated with the sub-pixel is driven at a steady state voltage;
• shift the first voltage driven onto the first source line while the first common electrode is modulated between the second voltage and the third voltage by a value about equal to a difference between the second voltage and the third voltage;
• receive resulting signals with the receiver electrodes while the first common electrode is modulated between the second voltage and the third voltage;
• and
• determine positional information based on the resulting signals.