A display apparatus comprises a first thin film transistor (TFT) and a second TFT which are disposed in a display area. A first signal transmission line is disposed in a peripheral area surrounding the display area and is electrically connected to the first TFT. A second signal transmission line adjacent to the first signal transmission line is electrically connected to the second TFT. In a first portion of the peripheral area, the first signal transmission line is parallel to the second signal transmission line and is spaced by a first gap from the second signal transmission line. In a second portion of the peripheral area, the first signal transmission line is parallel to the second signal transmission line and is spaced by a second gap from and the second signal transmission line. The second gap is greater than the first gap. Other features are also provided.