A display device comprising: a substrate; a display unit disposed over the substrate and comprising a thin film transistor, a display element electrically connected to the thin film transistor, a protection layer, and a planarization layer, wherein the protection layer and the planarization layer are disposed between the thin film transistor and the display element; and an encapsulation layer arranged to seal the display unit, wherein the display unit comprises a display area and a non-display area outside the display area, the non-display area comprises a voltage line, the planarization layer comprises a dividing region, in which a portion of the planarization layer is removed, arranged to divide the planarization layer into a center portion and an outer portion, the dividing region surrounds the display area, the voltage line is partially disposed in the dividing region, the protection layer at least covers sides of the voltage line disposed in the dividing region, the voltage line comprises a first voltage line and a second voltage line to which different voltages are applied, the first voltage line comprises a first main voltage line and a first connector protruding from the first main voltage line in a first direction, intersecting the dividing region and exposed in the dividing region, the second voltage line comprises a second main voltage line and a second connector protruding from the second main voltage line, intersecting the dividing region and exposed in the dividing region, the first connector and the second connector are connected to a pad, the protection layer covers two sides of the first connector and two sides of the second connector exposed in the dividing region, the protection layer exposes at least a portion of an upper surface of the first connector and at least a portion of an upper surface of the second connector in the dividing region, and the encapsulation layer directly contacts exposed portions of the upper surface of the first connector and the upper surface of the second connector in the dividing region. a substrate; a display unit disposed over the substrate and comprising a thin film transistor, a display element electrically connected to the thin film transistor, a protection layer, and a planarization layer, wherein the protection layer and the planarization layer are disposed between the thin film transistor and the display element; and an encapsulation layer arranged to seal the display unit, wherein the display unit comprises a display area and a non-display area outside the display area, the non-display area comprises a voltage line, the planarization layer comprises a dividing region, in which a portion of the planarization layer is removed, arranged to divide the planarization layer into a center portion and an outer portion, the dividing region surrounds the display area, the voltage line is partially disposed in the dividing region, the protection layer at least covers sides of the voltage line disposed in the dividing region, the voltage line comprises a first voltage line and a second voltage line to which different voltages are applied, the first voltage line comprises a first main voltage line and a first connector protruding from the first main voltage line in a first direction, intersecting the dividing region and exposed in the dividing region, the second voltage line comprises a second main voltage line and a second connector protruding from the second main voltage line, intersecting the dividing region and exposed in the dividing region, the first connector and the second connector are connected to a pad, the protection layer covers two sides of the first connector and two sides of the second connector exposed in the dividing region, the protection layer exposes at least a portion of an upper surface of the first connector and at least a portion of an upper surface of the second connector in the dividing region, and the encapsulation layer directly contacts exposed portions of the upper surface of the first connector and the upper surface of the second connector in the dividing region.