Touch display device

A touch display device comprising:

• a display panel comprising a substrate, a plurality of sub-pixels on the substrate, a plurality of data lines and a plurality of gate lines electrically connected to the plurality of sub-pixels, and a plurality of touch electrodes overlapping at least one sub-pixel among the plurality of sub-pixels;
• a gate driving circuit configured to receive a high-level gate voltage through a peripheral line disposed on the substrate, and output a gate voltage pulse to the plurality of gate lines according to the high-level gate voltage;
• a first circuit configured to output a pulse width modulation signal;
• a second circuit configured to output a touch electrode driving signal having a same frequency as the pulse width modulation signal to one or more of the plurality of touch electrodes;
• and
• a third circuit configured to output a signal having the same frequency as the pulse width modulation signal to the gate driving circuit through the peripheral line, the signal outputted during a period in which the second circuit outputs the touch electrode driving signal to at least one touch electrode among the plurality of touch electrodes;
• wherein a voltage applied to the peripheral line increases to a second voltage level that is greater than a first voltage level of a signal for display before the signal is applied to the at least one touch electrode during the display period.

A touch display device comprising:

• a display panel comprising a substrate, a plurality of sub-pixels on the substrate, a plurality of data lines and a plurality of gate lines electrically connected to the plurality of sub-pixels, and a plurality of touch electrodes overlapping at least one sub-pixel among the plurality of sub-pixels;
• a plurality of signal generating circuits configured to generate a high-level gate voltage, a first touch synchronization signal defining a touch period and a display period that is after the touch period, and a second touch synchronization signal defining a first period and a second period that is after the first period, the first period overlapping a first portion of the touch period and the second period overlapping the display period and a second portion of the touch period that is after the first portion of the touch period;
• and
• a gate driving circuit configured to receive the high-level gate voltage through a peripheral line, and output a gate signal to the plurality of gate lines during the display period according to the high-level gate voltage,
• wherein during the second period of the second touch synchronization signal that overlaps the second portion of the touch period, the high-level gate voltage applied to the peripheral line increases from a first voltage level to a second voltage level that is greater than the first voltage level and reaches the second voltage level by at least a start of the display period defined by the first touch synchronization signal.