A display device comprising: a display panel including a screen having a plurality of pixels, gate lines and data lines, the display panel being foldable along a predefined folding boundary to fold the screen into a predefined first screen part and a predefined second screen part, wherein each of the pixels includes: a light emitting diode (OLED); a drive element disposed between a pixel driving voltage terminal (ELVDD) and the light emitting diode (OLED) to supply a current to the light emitting diode; and a capacitor (Cst) connected to the pixel driving voltage terminal (ELVDD), and to a gate of the drive element; a first gate driver (120G1, 120E1) connected to a plurality of gate lines on the first screen part and configured to supply gate signals to the gate lines on the first screen part in response to a first gate start pulse (GVST1, EVST1); a second gate driver (120G2, 120E2) connected to a plurality of gate lines on the second screen part and configured to supply gate signals to the gate lines on the second screen part in response to a second gate start pulse (GVST2, EVST2); a data driver connected to a plurality of data lines on the first and second screen parts (L, R) and configured to supply a data voltage (Vdata) of an image input to data lines; and a display panel driver (120, 300) configured to generate the first gate start pulse (GVST1, EVST1) and the second gate start pulse (GVST2, EVST2), wherein in a folded state of the display panel, the display panel driver (120, 300) is configured to activate one of the first and second screen parts (L, R) to display an image on the activated screen part (L, R) and to deactivate the other one of the first and second screen parts (L, R) and display a black gray scale on the deactivated screen part, the first gate driver (120G1, 120E1) is configured to supply gate signals in the form of scan pulses to gate lines of the activated or deactivated first screen part based on the first gate start pulse (GVST1, EVST1), the second gate driver (120G2, 120E2) is configured to supply gate signals in the form of scan pulses to gate lines of the deactivated or activated second screen part based on the second gate start pulse (GVST2, EVST2), wherein, when the first screen part is activated and the second screen part is deactivated, the first gate driver (120G1, 120E1) is configured to output the gate signals by receiving the first gate start pulse (GVST1, EVST1), which is generated at a frame frequency of 60 Hz, and gate shift clocks, and the second gate driver (120G2, 120E2) is configured to output the gate signals by receiving the second gate start pulse (GVST2, EVST2), which is generated at a frame frequency of 60/n Hz, and gate shift clocks, wherein n is a positive integer ranging from 2 and 60. a display panel including a screen having a plurality of pixels, gate lines and data lines, the display panel being foldable along a predefined folding boundary to fold the screen into a predefined first screen part and a predefined second screen part, wherein each of the pixels includes: a light emitting diode (OLED); a drive element disposed between a pixel driving voltage terminal (ELVDD) and the light emitting diode (OLED) to supply a current to the light emitting diode; and a capacitor (Cst) connected to the pixel driving voltage terminal (ELVDD), and to a gate of the drive element; a first gate driver (120G1, 120E1) connected to a plurality of gate lines on the first screen part and configured to supply gate signals to the gate lines on the first screen part in response to a first gate start pulse (GVST1, EVST1); a second gate driver (120G2, 120E2) connected to a plurality of gate lines on the second screen part and configured to supply gate signals to the gate lines on the second screen part in response to a second gate start pulse (GVST2, EVST2); a data driver connected to a plurality of data lines on the first and second screen parts (L, R) and configured to supply a data voltage (Vdata) of an image input to data lines; and a display panel driver (120, 300) configured to generate the first gate start pulse (GVST1, EVST1) and the second gate start pulse (GVST2, EVST2), wherein in a folded state of the display panel, the display panel driver (120, 300) is configured to activate one of the first and second screen parts (L, R) to display an image on the activated screen part (L, R) and to deactivate the other one of the first and second screen parts (L, R) and display a black gray scale on the deactivated screen part, the first gate driver (120G1, 120E1) is configured to supply gate signals in the form of scan pulses to gate lines of the activated or deactivated first screen part based on the first gate start pulse (GVST1, EVST1), the second gate driver (120G2, 120E2) is configured to supply gate signals in the form of scan pulses to gate lines of the deactivated or activated second screen part based on the second gate start pulse (GVST2, EVST2), wherein, when the first screen part is activated and the second screen part is deactivated, the first gate driver (120G1, 120E1) is configured to output the gate signals by receiving the first gate start pulse (GVST1, EVST1), which is generated at a frame frequency of 60 Hz, and gate shift clocks, and the second gate driver (120G2, 120E2) is configured to output the gate signals by receiving the second gate start pulse (GVST2, EVST2), which is generated at a frame frequency of 60/n Hz, and gate shift clocks, wherein n is a positive integer ranging from 2 and 60.