Display device
A high-resolution display device is provided. A display device having both high display quality and high resolution is provided. The display device includes a plurality of first light-emitting elements and a plurality of second light-emitting elements. The first light-emitting element comprises a first pixel electrode, a first EL layer, a common layer, and a common electrode. The second light-emitting element comprises a second pixel electrode, a second EL layer, the common layer, and the common electrode. The first EL layer and the second EL layer are provided to be apart from each other, and a side surface of the first EL layer and a side surface of the second EL layer are provided to face each other. A first light-emitting unit, a first intermediate layer, and a second light-emitting unit are stacked in the first EL layer. A third light-emitting unit, a second intermediate layer, and a fourth light-emitting unit are stacked in the second EL layer. The first light-emitting unit and the second light-emitting unit each comprise a first light-emitting layer emitting light of a first color, and the third light-emitting unit and the fourth light-emitting unit each comprise a second light-emitting layer emitting light of a second color different from the first color.
1 . A display device comprising a plurality of first light-emitting elements and a plurality of second light-emitting elements,
wherein each of the first light-emitting elements comprises a first pixel electrode, a first EL layer, a common layer, and a common electrode in this order from a substrate side,
wherein each of the second light-emitting elements comprises a second pixel electrode, a second EL layer, the common layer, and the common electrode in this order from the substrate side,
wherein the first light-emitting elements and the second light-emitting elements are arranged in a first direction,
wherein the plurality of first light-emitting elements and the plurality of second light-emitting elements are each arranged in a second direction intersecting with the first direction,
wherein an end portion of the first EL layer and an end portion of the second EL layer are not in contact with each other but face each other with a space therebetween,
wherein the first EL layer comprises a region not overlapping with the first pixel electrode,
wherein the second EL layer comprises a region not overlapping with the second pixel electrode,
wherein a first light-emitting unit, a first intermediate layer, and a second light-emitting unit are stacked in the first EL layer,
wherein a third light-emitting unit, a second intermediate layer, and a fourth light-emitting unit are stacked in the second EL layer,
wherein the first light-emitting unit and the second light-emitting unit each comprise a first light-emitting layer emitting light of a first color, and
wherein the third light-emitting unit and the fourth light-emitting unit each comprise a second light-emitting layer emitting light of a second color different from the first color.
2 . The display device according to claim 1 ,
wherein the side surface of the first EL layer is perpendicular or substantially perpendicular to a formation surface of the first EL layer, and
wherein the side surface of the second EL layer is perpendicular or substantially perpendicular to a formation surface of the second EL layer.
3 . The display device according to claim 1 ,
wherein an angle between the side surface of the first EL layer and a formation surface of the first EL layer is greater than or equal to 60° and less than or equal to 90°, and
wherein an angle between the side surface of the second EL layer and a formation surface of the second EL layer is greater than or equal to 60° and less than or equal to 90°.
4 . The display device according to claim 1 , further comprising an insulating layer between the first pixel electrode and the second pixel electrode,
wherein the common layer and the common electrode have a region that overlaps with neither the first EL layer nor the second EL layer and overlaps with the insulating layer, and
wherein end portions of the first EL layer and the second EL layer are positioned over the insulating layer.
5 . The display device according to claim 4 ,
wherein the insulating layer comprises an organic insulating film or an inorganic insulating film.
6 . The display device according to claim 1 , further comprising a connection electrode on the same surface as the first pixel electrode,
wherein the connection electrode is electrically connected to the common electrode without through the first EL layer and the second EL layer.
7 . The display device according to claim 6 ,
wherein the connection electrode is electrically connected to the common electrode through the common layer.
8 . The display device according to claim 1 ,
wherein the plurality of first light-emitting elements are arranged with a resolution higher than or equal to 1000 ppi, and
wherein an aperture ratio is higher than or equal to 50%.