Flicker quantification system and method of driving the same

A flicker quantification system comprising:

• a display device configured to be driven according to a unit of a reference period comprising a first frame for writing data and at least one second frame for holding the data;
• a luminance measurer configured to generate luminance data by measuring a luminance of a display surface of the display device during the reference period;
• a voltage measurer configured to measure a voltage of a photo sensor corresponding to light emitted from the display surface, and to generate first voltage data representing an accumulation amount of the voltage during the first frame and second voltage data representing an accumulation amount of the voltage during the at least one second frame;
• and
• a processor configured to calculate a flicker index value representing a ratio of a measured luminance difference to a just noticeable difference, based on the luminance data, the first voltage data, and the second voltage data,
• wherein the measured luminance difference represents the difference between a luminance during the first frame and a luminance during the at least one second frame.