Touch display driving integrated circuit, operation method of the same, and touch display device including the same

An operation method of a touch display driving integrated circuit (IC) configured to be connected to touch electrodes through touch sensing lines and to be connected to pixels through data lines, the touch signal driving IC repeatedly providing a plurality of display periods and a plurality of touch periods in each cycle of a vertical synchronization signal, the operation method comprising:

• providing a sensing signal to first touch sensing lines among the touch sensing lines and a first voltage to second touch sensing lines different from the first touch sensing lines among the touch sensing lines to perform a touch scan operation in a touch period;
• applying a common voltage to the second touch sensing lines and a second voltage to the first touch sensing lines in a display period immediately following the touch period;
• providing a data signal to the data lines in the display period immediately following the touch period,
• wherein the first voltage and the second voltage are a same voltage and are one of a ground voltage, a floating voltage, and a specific voltage different from the common voltage.

A touch display device comprising:

• a display panel including a plurality of touch electrodes and a plurality of pixels;
• a touch driver integrated circuit (IC) connected to the plurality of touch electrodes through touch sensing lines and repeatedly providing a plurality of display periods and a plurality of touch periods in each cycle of a vertical synchronization signal,
• wherein the touch driver IC is configured to:
• in a touch period, perform a touch scan operation on first touch electrodes among the plurality of touch electrodes and provide a first voltage to second touch electrodes different from the first touch electrodes among the plurality of touch electrodes, and
• in a display period immediately following the touch period, apply a common voltage to the second touch electrodes and apply a second voltage to the first touch electrodes;
• and
• a source driver IC configured to be connected to the plurality of pixels through data lines, and to provide a data signal to the data lines in the display period immediately following the touch period,
• wherein the first voltage and the second voltage are a same voltage and are one of a ground voltage, a floating voltage, and a specific voltage different from the common voltage.