Display device performing multi-frequency driving, and method of operating a display device

A method of operating a display device, the method comprising:

• determining a first driving frequency for a first partial panel region of a display panel and a second driving frequency for a second partial panel region of the display panel;
• providing data voltages to the first and second partial panel regions in a first frame period in a case where the second driving frequency is lower than the first driving frequency;
• providing the data voltages to the first partial panel region in a second frame period in the case where the second driving frequency is lower than the first driving frequency;
• determining a voltage level of a blank voltage for the second partial panel region in the case where the second driving frequency is lower than the first driving frequency;
• and
• providing the blank voltage to the second partial panel region in the second frame period in the case where the second driving frequency is lower than the first driving frequency.