Display Device and Driving Method of the Display Device

A display device, comprising:

• a display panel having an arrangement of a plurality of pixels, a first pixel of the plurality of pixels including:
• a light emitting element configured to emit light,
• a driving transistor having a gate electrode connected to a first node, the driving transistor connected to the light emitting element through a second node;
• a first transistor having a first electrode connected to a data line, a second electrode connected to the first node and a gate electrode connected to a first gate line, and
• a second transistor having a first electrode connected to a reference voltage line, a second electrode connected to the second node and a gate electrode connected to a second gate line;
• a gate driver configured to provide a first scan signal to the first gate line and a second scan signal to the second gate line;
• a data driver configured to provide a data voltage to the data line;
• a power supply unit configured to provide a reference voltage to the reference voltage line;
• and
• a timing controller configured to control an operation of the data driver and the power supply unit,
• wherein the timing controller controls the power supply unit to vary the reference voltage based on at least one among a driving mode of the display device, a degree of deterioration of the first pixel, and a driving frequency of the first pixel.