A display panel comprising: a base substrate; a first sub pixel electrode over the base substrate; a second sub pixel electrode over the base substrate and spaced apart from the first sub pixel electrode when viewed in plane; a third sub pixel electrode spaced apart from the first and second sub pixel electrodes when viewed in plane; a fourth sub pixel electrode spaced apart from the first to third sub pixel electrodes when viewed in plane; a first light emitting unit over the first to fourth sub pixel electrodes, the first light emitting unit being provided with a first contact hole; a first charge generation layer overlapping the first sub pixel electrode (no) when viewed in plane and comprising a first contact part and a first extension part extending from the first contact part, the first contact part being in the first contact hole and being coupled to a portion of the first sub pixel electrode exposed by the first contact hole, and the first extension part being on the first light emitting unit; a second charge generation layer over the first light emitting unit and overlapping the second sub pixel electrode when viewed in plane, the second charge generation layer being insulated from the first charge generation layer; a third charge generation layer over the first light emitting unit and overlapping the fourth sub pixel electrode when viewed in plane, the third charge generation layer being insulated from the first and second charge generation layers; a second light emitting unit over the first to third charge generation layers, the second light emitting unit and the second charge generation layer together being provided with a second contact hole; and an upper electrode comprising a first upper electrode part and a second upper electrode part extending from the first upper electrode part, the first upper electrode part being in the second contact hole and being coupled to a second contact part of the second charge generation layer exposed by the second contact hole, and the second upper electrode part being on an entire top surface of the second light emitting unit, wherein the second charge generation layer comprises a second extension part extending from the second contact part to overlap the second sub-pixel electrode when viewed in plane, and a third extension part extending from the second contact part to overlap the third sub-pixel electrode when viewed in plane, wherein the third charge generation layer is not connected to the fourth sub pixel electrode and to the upper electrode, and wherein both the first light emitting unit and the second light emitting unit of the fourth sub pixel emit light by a driving current defined along the fourth sub pixel electrode, the first light emitting unit, the third charge generation layer, the second light emitting unit, and the second upper electrode part. a base substrate; a first sub pixel electrode over the base substrate; a second sub pixel electrode over the base substrate and spaced apart from the first sub pixel electrode when viewed in plane; a third sub pixel electrode spaced apart from the first and second sub pixel electrodes when viewed in plane; a fourth sub pixel electrode spaced apart from the first to third sub pixel electrodes when viewed in plane; a first light emitting unit over the first to fourth sub pixel electrodes, the first light emitting unit being provided with a first contact hole; a first charge generation layer overlapping the first sub pixel electrode (no) when viewed in plane and comprising a first contact part and a first extension part extending from the first contact part, the first contact part being in the first contact hole and being coupled to a portion of the first sub pixel electrode exposed by the first contact hole, and the first extension part being on the first light emitting unit; a second charge generation layer over the first light emitting unit and overlapping the second sub pixel electrode when viewed in plane, the second charge generation layer being insulated from the first charge generation layer; a third charge generation layer over the first light emitting unit and overlapping the fourth sub pixel electrode when viewed in plane, the third charge generation layer being insulated from the first and second charge generation layers; a second light emitting unit over the first to third charge generation layers, the second light emitting unit and the second charge generation layer together being provided with a second contact hole; and an upper electrode comprising a first upper electrode part and a second upper electrode part extending from the first upper electrode part, the first upper electrode part being in the second contact hole and being coupled to a second contact part of the second charge generation layer exposed by the second contact hole, and the second upper electrode part being on an entire top surface of the second light emitting unit, wherein the second charge generation layer comprises a second extension part extending from the second contact part to overlap the second sub-pixel electrode when viewed in plane, and a third extension part extending from the second contact part to overlap the third sub-pixel electrode when viewed in plane, wherein the third charge generation layer is not connected to the fourth sub pixel electrode and to the upper electrode, and wherein both the first light emitting unit and the second light emitting unit of the fourth sub pixel emit light by a driving current defined along the fourth sub pixel electrode, the first light emitting unit, the third charge generation layer, the second light emitting unit, and the second upper electrode part.