Display device

A display device comprising:

• a display unit including a plurality of scan lines and a pixel coupled to the scan lines;
• a timing controller configured to operate in a first mode and a second mode, and to generate a start signal based on a vertical synchronization signal;
• and
• a scan driver configured to generate a scan signal based on the start signal, and sequentially provide the scan signal to the scan lines,
• wherein the timing controller generates the start signal immediately after a pulse of the vertical synchronization signal is applied in the first mode, and generates the start signal at a time at which a pulse of the vertical synchronization signal is applied in the second mode.

A method of controlling a display device comprising:

• selecting a first display mode;
• transmitting a first vertical synchronization signal to a pixel;
• transmitting a first start signal to the pixel after the first vertical synchronization signal based on the first display mode;
• selecting a second display mode;
• transmitting a second vertical synchronization signal to the pixel;
• and
• transmitting a second start signal to the pixel simultaneously to or before the second vertical synchronization signal based on the second display mode.