Display device and manufacturing method therefor
A display device comprises a first electrode, a first insulating layer disposed on the first electrode, a second electrode disposed on the first insulating layer, at least a part of the second electrode facing the first electrode in a first direction, one or more first light-emitting elements disposed between the first electrode and the second electrode, the one or more first light-emitting elements extending in a direction, wherein the first insulating layer partially encompasses the outer surface of the one or more first light-emitting element, and the extending direction of at least one of the one or more first light-emitting element is parallel to the first direction.
1. A display device comprising:
a first electrode;
a first insulating layer disposed on the first electrode;
a second electrode disposed on the first insulating layer, at least a part of the second electrode facing the first electrode in a first direction;
one or more first light-emitting elements disposed between the first electrode and the second electrode, the one or more first light-emitting elements extending in a direction,
wherein the first insulating layer partially covers outer surfaces of the one or more first light-emitting elements, and
wherein at least one of the one or more first light-emitting elements extends parallel to the first direction.
2. The display device of claim 1 , wherein
first ends of the one or more first light-emitting elements contact the first electrode, and
second ends of the one or more first light-emitting elements contact the second electrode.
3. The display device of claim 2 , wherein an acute angle formed by the direction in which the one or more first light-emitting elements extend and a second direction perpendicular to the first direction is in the range of about 80 degrees up to and including 90 degrees.
4. The display device of claim 3 , wherein
each of the one or more first light-emitting elements comprises:
a first conductivity type semiconductor;
a second conductivity type semiconductor; and
an active layer disposed between the first conductivity type semiconductor and
the second conductivity type semiconductor, and
the first conductivity type semiconductor, the active layer, and the second conductivity type semiconductor are sequentially disposed along the first direction in at least one of the one or more of the first light-emitting elements.
5. The display device of claim 4 , wherein
each of the one or more first light-emitting elements comprises an insulating film surrounding side surfaces of the first conductivity type semiconductor, the second conductivity type semiconductor, and the active layer, and
the insulating film contacts the first insulating layer.
6. The display device of claim 4 , wherein light emitted from the active layer in at least one of the one or more first light-emitting elements travels parallel to the first direction.
7. The display device of claim 2 , further comprising:
a second insulating layer disposed between the second electrode and the first insulating layer; and
an opening area disposed in an area surrounded by the second insulating layer to partially expose the first insulating layer.
8. The display device of claim 7 , wherein
the first electrode overlaps the opening area and at least a part of the second insulating layer in the first direction, and
the one or more first light-emitting elements are disposed between the first electrode and the second electrode in the opening area.
9. The display device of claim 8 , wherein an area of the first electrode is larger than that of the opening area.
10. The display device of claim 7 , wherein
the second ends of the one or more first light-emitting elements partially protrude from an upper surface of the first insulating layer, and
the second electrode surrounds the second ends of the one or more first light-emitting elements partially protruding from the upper surface of the first insulating layers.
11. The display device of claim 10 , wherein a thickness of the second insulating layer is greater than a height of the second ends of each of the one or more first light-emitting elements.
12. The display device of claim 11 , wherein a length of each of the one or more first light-emitting elements extending in the direction is in a range of about 3 to about 6 μm.
13. The display device of claim 10 , wherein the first electrode further comprises first electrode protrusions which protrude from an upper surface thereof to cover the first ends of the first light-emitting elements.
14. The display device of claim 7 , further comprising:
a third electrode spaced apart from the first electrode in a second direction perpendicular to the first direction, the third electrode facing at least a part of the second electrode in the first direction; and
second light-emitting elements which are disposed between the third electrode and the second electrode,
wherein the first insulating layer is disposed between the third electrode and the second electrode.
15. The display device of claim 14 , wherein
the second insulating layer partially overlaps the first electrode and the third electrode in the first direction, and
the first electrode and the third electrode are spaced apart from each other in an area overlapping the second insulating layer.
16. A method of manufacturing a display device, the method comprising:
preparing a base part including a first electrode, a first insulating layer covering the first electrode, and a second insulating layer partially disposed on the first insulating layer;
inserting light-emitting elements extending in a direction into the first insulating layer in a first direction perpendicular to an upper surface of the first insulating layer; and
forming a second electrode covering the first insulating layer and the second insulating layer.
17. The method of claim 16 , wherein the inserting of the light-emitting elements into the first insulating layer comprises:
spraying the light-emitting elements onto the first electrode;
aligning the light-emitting elements such that the direction in which the light-emitting elements extend is parallel to the first direction by forming an electric field adjacent to the first electrode; and
inserting the light-emitting elements into the first insulating layer in the first direction.
18. The method of claim 17 , wherein
the second insulating layer comprises an opening area which partially exposes the first insulating layer, and
the light-emitting elements are inserted into the first insulating layer in the opening area.
19. The method of claim 18 , wherein the forming of the second electrode further comprises removing the light-emitting elements sprayed on the second insulating layer.
20. The method of claim 19 , wherein
an end of each of the light-emitting elements partially protrudes from the first insulating layer, and
the second electrode is formed to cover the end of each of the light-emitting elements.