A display device comprising: a substrate comprising a display area, a peripheral area outside the display area, and a pad area (PADA) in the peripheral area; a first main voltage line extending along a first edge of the display area in the peripheral area of the substrate and arranged between an edge of the display area and the pad area, and a first connector extending from the first main voltage line to the pad area; and a second main voltage line arranged in the peripheral area of the substrate and extending along a second edge of the display area, the second edge being connected to the first edge, and a second connector extending from the second main voltage line to the pad area, the second connector being laterally spaced apart from the first connector, wherein each of the first connector and the second connector comprises a first layer (Ml) and a second layer overlapping the first layer with a first insulating layer therebetween, wherein a second insulating layer is over the second layer, and wherein the first insulating layer and the second insulating layer are arranged in the display area and the peripheral area of the substrate, the peripheral area comprises an open area in which the first insulating layer and the second insulating layer are removed, the open area surrounding the display area, wherein parts of the first connector and the second connector are exposed in the open area, the first insulating layer comprises a plurality of slits arranged between the first connector and the second connector and extending from an end of the first insulating layer toward the display area, and the second insulating layer covers an end of the first insulating layer directed toward the open area such that the end of the second insulating layer forms a boundary with the open area. a substrate comprising a display area, a peripheral area outside the display area, and a pad area (PADA) in the peripheral area; a first main voltage line extending along a first edge of the display area in the peripheral area of the substrate and arranged between an edge of the display area and the pad area, and a first connector extending from the first main voltage line to the pad area; and a second main voltage line arranged in the peripheral area of the substrate and extending along a second edge of the display area, the second edge being connected to the first edge, and a second connector extending from the second main voltage line to the pad area, the second connector being laterally spaced apart from the first connector, wherein each of the first connector and the second connector comprises a first layer (Ml) and a second layer overlapping the first layer with a first insulating layer therebetween, wherein a second insulating layer is over the second layer, and wherein the first insulating layer and the second insulating layer are arranged in the display area and the peripheral area of the substrate, the peripheral area comprises an open area in which the first insulating layer and the second insulating layer are removed, the open area surrounding the display area, wherein parts of the first connector and the second connector are exposed in the open area, the first insulating layer comprises a plurality of slits arranged between the first connector and the second connector and extending from an end of the first insulating layer toward the display area, and the second insulating layer covers an end of the first insulating layer directed toward the open area such that the end of the second insulating layer forms a boundary with the open area.