Display device and touch driving method

A touch driving method comprising:

• providing driving signals to touch electrodes included in a touch panel;
• and
• detecting a touch and a touch position by sensing a change in values of capacitance formed between the touch electrodes and a common electrode,
• wherein the providing the driving signals includes:
• providing a first driving signal to first touch electrodes included in a first sensing area among the touch electrodes, and
• providing a second driving signal to second touch electrodes included in a second sensing area among the touch electrodes, wherein the first driving signal and the second driving signal have different frequencies that are changed in sets during a driving period by different non-zero frequency intervals, respectively,
• scheduling the frequency changes of the first driving signal and the second driving signal to be independently performed at different times;
• and
• controlling the frequency of the first driving signal and the frequency of the second driving signal in different frequency change ranges.

A touch controller, comprising:

• a first touch driver configured to drive touch electrodes in a first sensing area of a touch panel;
• and
• a second touch driver configured to drive touch electrodes in a second sensing area of the touch panel,
• wherein the first touch driver is configured to drive the touch electrodes in the first sensing area based on a first driving signal and the second touch driver is configured to drive the touch electrodes in the second sensing area based on a second driving signal, the first driving signal and the second driving signal having different frequencies that are changed in sets during a driving period by different non-zero frequency intervals, respectively,
• wherein the first driving signal and the second driving signal have different frequencies that are changed in sets during a driving period by different non-zero frequency intervals, respectively, wherein frequency changes of the first and second driving signals are independently performed at different times, and
• the frequency of the first driving signal and the frequency of the second driving signal are changed in different frequency change ranges.