Pixel circuit and display device including the same

A pixel circuit comprising:

• a driving element including a first electrode connected to a first node to which a first constant voltage is applied, a gate electrode connected to a second node, and a second electrode connected to a third node, the driving element configured to supply an electric current to a light emitting element;
• a first switch element configured to be turned on according to a gate-on voltage of a first gate pulse to supply a data voltage to the second node;
• a second switch element configured to be turned off according to a gate-off voltage of a second gate pulse;
• a third switch element configured to be turned on according to a gate-on voltage of a third gate pulse to supply a second constant voltage to the third node;
• a fourth switch element configured to be turned on according to a gate-on voltage of a fourth gate pulse to apply a third constant voltage to the second node;
• and
• a capacitor configured to be connected between the second node and the third node,
• wherein the second gate pulse is inverted with respect to the gate-off voltage when the third gate pulse is inverted with respect to the gate-on voltage, and the second gate pulse is inverted with respect to the gate-on voltage when the first gate pulse is inverted with respect to the gate-on voltage.