A display device includes a pixel unit including pixels connected to data lines and scan lines; a data driver disposed on one side of the pixel unit; a scan driver disposed on the one side of the pixel unit together with the data driver; and a controller which controls a slew rate and output timing of data signals output to the data lines based on a load of the scan lines and a load of the data lines. Each of the scan lines includes a main scan line extending in a first direction and connected to pixels in a corresponding pixel row; a first sub-scan line extending in a second direction and connected to the main scan line at a first contact point; and a second sub-scan line extending in the second direction and connected to the main scan line at a second contact point.