A display device is disclosed, which includes: a substrate having a display region and a peripheral region adjacent to the display region; a first transistor disposed on the display region and comprising a first channel layer, wherein the first channel layer includes an oxide semiconductor layer; and a second transistor disposed on the peripheral region and comprising a second channel layer, wherein the second channel layer includes a silicon semiconductor layer. Herein, a first ratio, which is a ratio of a first channel width of the first channel layer to the first channel length thereof, is greater than or equal to 0.4 and less than or equal to 4.5; and a second ratio, which is a ratio of a second channel width of the second channel layer to a second channel length thereof, is greater than or equal to 0.05 and less than or equal to 0.8.