Touch processor, touch display driver integrated circuit chip including touch processor, and method of operating touch processor

A touch display driver integrated circuit (DDI) chip for a display panel including a touch panel, the touch DDI chip comprising:

• a display driver configured to drive the display panel through at least one gate line and at least one data line;
• and
• a touch processor configured to provide a driving signal to the touch panel and generate touch information based on a sensing signal output by the touch panel,
• wherein the touch DDI chip provides at least a first compensation signal to the display panel, the first compensation signal having a waveform which is different than a waveform of the driving signal, and the waveform of the first compensation signal being determined according to a parasitic component of a cell switch of the display panel.

A device, comprising:

• a driver configured to supply a driving signal to a sensing cell of a touch panel, the sensing cell being configured to detect an object that approaches or contacts the touch panel, and to provide touch information indicating detection of the object;
• a switch controller configured to turn off a switch associated with the sensing cell during a period for sensing a touch of the touch panel;
• and
• a compensation signal generator configured to generate at least a first compensation signal and to apply the first compensation signal to the sensing cell such that signals applied across a first ambient capacitance component of the switching cell have substantially a same waveform as each other, so as to reduce a value of the first ambient capacitance component of the sensing cell during the period for sensing the touch of the touch panel.