A display device comprising: a display panel comprising a plurality of pixels (PX), each pixel including a thin film transistor (TFT); and a plurality of data lines (DL1-DLm) and a plurality of gate lines (GL1-GLn) that are each respectively connected with a source electrode and a gate electrode of the TFT included in each of the plurality of pixels (PX); and a display driving circuit configured to vary a frame frequency of the display panel according to an operation mode, to select a gamma curve corresponding to the frame frequency, wherein the selected gamma curve is one among a plurality of gamma curves that are set so as to correspond to different frame frequencies, and to drive the display panel based on the selected gamma curve, wherein, the display driving circuit is configured such that when the frame frequency of the display panel is equal to or lower than a reference value, the display driving circuit periodically changes a level of a gate-on voltage between a first voltage level (VON1) and a second voltage level (VON2) that is lower than the first voltage level (VON1), so that the levels of gate signals that are provided to gate line (GL1-GLn) are switched from the gate-on voltage having the first voltage level (VON1) to the gate-on voltage having the second voltage level (VON2), and then the levels of the gate signals are switched to a gate-off voltage (VOFF) to reduce a falling slew rate of a gate signal that is provided to the plurality of gate lines (GL1-GLn). a display panel comprising a plurality of pixels (PX), each pixel including a thin film transistor (TFT); and a plurality of data lines (DL1-DLm) and a plurality of gate lines (GL1-GLn) that are each respectively connected with a source electrode and a gate electrode of the TFT included in each of the plurality of pixels (PX); and a plurality of pixels (PX), each pixel including a thin film transistor (TFT); and a plurality of data lines (DL1-DLm) and a plurality of gate lines (GL1-GLn) that are each respectively connected with a source electrode and a gate electrode of the TFT included in each of the plurality of pixels (PX); and a display driving circuit configured to vary a frame frequency of the display panel according to an operation mode, to select a gamma curve corresponding to the frame frequency, wherein the selected gamma curve is one among a plurality of gamma curves that are set so as to correspond to different frame frequencies, and to drive the display panel based on the selected gamma curve, wherein, the display driving circuit is configured such that when the frame frequency of the display panel is equal to or lower than a reference value, the display driving circuit periodically changes a level of a gate-on voltage between a first voltage level (VON1) and a second voltage level (VON2) that is lower than the first voltage level (VON1), so that the levels of gate signals that are provided to gate line (GL1-GLn) are switched from the gate-on voltage having the first voltage level (VON1) to the gate-on voltage having the second voltage level (VON2), and then the levels of the gate signals are switched to a gate-off voltage (VOFF) to reduce a falling slew rate of a gate signal that is provided to the plurality of gate lines (GL1-GLn). <EOS>