A display device, comprising: a substrate comprising a display area and a peripheral area surrounding a periphery of the display area, the peripheral area comprising a first peripheral area and a second peripheral area; an insulating layer comprising a first insulating layer and a second insulating layer each disposed in the display area, the first peripheral area and the second peripheral area, and a first opening penetrating the first insulating layer and the second insulating layer in a region between the first peripheral area and the second peripheral area, the first opening separating the first peripheral area from the second peripheral area; a first conductive layer comprising a plurality of first holes (150H1) disposed in the first peripheral area and a plurality of second holes (150H2) disposed in the second peripheral area; and a second conductive layer disposed over the first conductive layer, and comprising a plurality of third holes (160H1) disposed in the first peripheral area and a plurality of fourth holes (160H2) disposed in the second peripheral area, wherein a portion of each first hole (150H1) among the plurality of first holes (150H1) overlaps a portion of a respective third hole (160H1) among the plurality of third holes (160H1), wherein the plurality of second holes (150H2) and the plurality of fourth holes (160H2) are offset from one another; wherein the second insulating layer is disposed over the first insulating layer, and wherein the first conductive layer is disposed over the first insulating layer, and the second conductive layer is disposed over the second insulating layer. a substrate comprising a display area and a peripheral area surrounding a periphery of the display area, the peripheral area comprising a first peripheral area and a second peripheral area; an insulating layer comprising a first insulating layer and a second insulating layer each disposed in the display area, the first peripheral area and the second peripheral area, and a first opening penetrating the first insulating layer and the second insulating layer in a region between the first peripheral area and the second peripheral area, the first opening separating the first peripheral area from the second peripheral area; a first conductive layer comprising a plurality of first holes (150H1) disposed in the first peripheral area and a plurality of second holes (150H2) disposed in the second peripheral area; and a second conductive layer disposed over the first conductive layer, and comprising a plurality of third holes (160H1) disposed in the first peripheral area and a plurality of fourth holes (160H2) disposed in the second peripheral area, wherein a portion of each first hole (150H1) among the plurality of first holes (150H1) overlaps a portion of a respective third hole (160H1) among the plurality of third holes (160H1), wherein the plurality of second holes (150H2) and the plurality of fourth holes (160H2) are offset from one another; wherein the second insulating layer is disposed over the first insulating layer, and wherein the first conductive layer is disposed over the first insulating layer, and the second conductive layer is disposed over the second insulating layer.