The disclosure describes a display device with a signal line electrode structure for preventing a scan line or a data line from being corroded. The display device comprises a substrate; a first electrode layer disposed over the substrate; a second electrode layer disposed to cover the first electrode layer and configured to electrically communicate with the first electrode layer; a pixel disposed over the substrate; and a cap attached to the substrate to cover the pixel, wherein the signal line is in electrical communication with the pixel, and includes a light transmitting apart in the sealant area.