A display device including a substrate having a display area and a non-display area outside the display area, a plurality of pixels disposed on the substrate in the display area, an external circuit bonded on the substrate in the non-display area, a first signal line disposed on the substrate in the non-display area and surrounding at least a portion of the display area, the first signal line being electrically connected to the external circuit, and a second signal line disposed in the non-display area and surrounding at least a portion of the first signal line, the second signal line being electrically connected to the external circuits.