Display device
A display device includes a first electrode extending in a first direction; a second electrode extending in the first direction and spaced apart from, in a second direction, the first electrode; a light-emitting element having a shape extending in a direction and between the first and second electrodes such that the direction is parallel to the second direction; a first contact electrode having a shape extending in a third direction and having at least a portion on the first electrode; and a second contact electrode having a shape extending in the third direction, spaced apart from, in a fourth direction, the first contact electrode, and having at least a portion on the second electrode, the first contact electrode electrically contacts a side of the light-emitting element, and the second contact electrode electrically contacts another side of the light-emitting element.
1. A display device comprising:
a first electrode extending in a first direction;
a second electrode extending in the first direction and spaced apart from the first electrode in a second direction intersecting the first direction;
a light-emitting element having a shape extending in one direction and disposed between the first electrode and the second electrode and the one direction is parallel to the second direction;
a first contact electrode having a shape extending in a third direction intersecting the first direction and the second direction and including at least a portion disposed on the first electrode; and
a second contact electrode having a shape extending in the third direction, spaced apart from the first contact electrode in a fourth direction intersecting the third direction, and including at least a portion disposed on the second electrode, wherein
the first contact electrode electrically contacts a side of the light-emitting element, and
the second contact electrode electrically contacts another side of the light-emitting element.
2. The display device of claim 1 , wherein each of the first contact electrode and the second contact electrode has a shape extending in the third direction that forms an inclination angle with the first direction in which the first electrode and the second electrode extend.
3. The display device of claim 2 , wherein the inclination angle is in a range of about 10° to about 80°.
4. The display device of claim 1 , wherein
the light-emitting element includes a first end surface and a second end surface in the one direction,
the first contact electrode electrically contacts a portion of the first end surface, and
the second contact electrode electrically contacts a portion of the second end surface.
5. The display device of claim 4 , wherein
the light-emitting element includes a third end surface and a fourth end surface in another direction intersecting the one direction,
the first contact electrode partially and electrically contacts the third end surface, and
the second contact electrode partially and electrically contacts the fourth end surface.
6. The display device of claim 5 , wherein
the light-emitting element includes:
a first semiconductor layer;
a second semiconductor layer; and
an active layer disposed between the first semiconductor layer and the second semiconductor layer, and
the light-emitting element includes:
a first light-emitting element disposed such that a surface of an active layer of the first light-emitting element facing the first direction; and
a second light-emitting element disposed such that a surface of an active layer of the second light-emitting element facing the second direction.
7. The display device of claim 6 , wherein a lower surface of a first semiconductor layer of the first light-emitting element includes the second end surface electrically contacting the second contact electrode.
8. The display device of claim 6 , wherein a lower surface of a first semiconductor layer of the second light-emitting element includes the fourth end surface electrically contacting the second contact electrode in the second light-emitting element.
9. The display device of claim 1 , wherein
a first length in the first direction and a second length in the second direction are defined in the light-emitting element, and
a separation distance between the first contact electrode and the second contact electrode satisfies,
DC≤LD sin θ c+HD cos θ c− 2 LCD sin θ c
wherein, “DC” is the separation distance between the first contact electrode and the second contact electrode, “LD” is the first length of the light-emitting element, “HD” is the second length of the light-emitting element, “LCD” is a length of a contact area in which an end surface of the light-emitting element electrically contacts the contact electrode, and “θc” is an inclination angle between an extending direction of the contact electrode and an extending direction of the electrode.
10. The display device of claim 9 , wherein the second length of the light-emitting element is greater than a separation distance between the first electrode and the second electrode.
11. The display device of claim 9 , wherein the first length is equal to the second length in the light-emitting element.
12. The display device of claim 11 , wherein a width of each of the first contact electrode and the second contact electrode is greater than a value obtained by dividing the length of the contact area by a sine value of the inclination angle.
13. The display device of claim 11 , wherein a length of each of the first contact electrode and the second contact electrode is greater than a value obtained by dividing the length of the contact area by a cosine value of the inclination angle.
14. The display device of claim 9 , wherein the first length is greater than the second length in the light-emitting element.
15. A display device comprising:
a first electrode including a portion extending in a first direction;
a second electrode including a portion extending in the first direction and spaced apart from and facing the first electrode in a second direction intersecting the first direction;
a light-emitting element disposed between the first electrode and the second electrode;
a first contact electrode having a shape extending in a third direction that forms an inclination angle with the first direction, the first contact electrode including at least a portion disposed on the first electrode; and
a second contact electrode having a shape extending in the third direction, spaced apart from the first contact electrode, the second contact electrode including at least a portion disposed on the second electrode, wherein
the first contact electrode electrically contact a side of the light-emitting element,
the second contact electrode electrically contacts another side of the light-emitting element, and
the inclination angle is in a range of about 10° to about 80°.
16. The display device of claim 15 , wherein
the first electrode includes:
a first electrode expansion portion; and
a first electrode connection portion, a width of the first electrode connection portion in the second direction being less than a width of the first electrode expansion portion in the second direction,
the second electrode includes:
a second electrode expansion portion; and
a second electrode connection portion, a width of the second electrode expansion portion in the second direction being less than a width of the second electrode expansion portion in the second direction, and
a first separation distance between the first electrode expansion portion and the second electrode expansion portion is less than a second separation distance between the first electrode connection portion and the second electrode connection portion.
17. The display device of claim 16 , wherein
the light-emitting element is disposed between the first electrode expansion portion and the second electrode expansion portion,
the first contact electrode electrically contacts the side of the light-emitting element on the first electrode expansion portion, and
the second contact electrode electrically contacts the another side of the light-emitting element on the second electrode expansion portion.
18. The display device of claim 17 , wherein a length of each of the first electrode expansion portion and the second electrode expansion portion, in the first direction, is greater than a length of the light-emitting element in the first direction and less than a sum of a length of the light-emitting element and a length of a portion in which an end surface of the light-emitting element electrically contacts the first contact electrode.
19. The display device of claim 15 , wherein
the first electrode includes:
a first electrode extension portion extending in the first direction; and
a first electrode bent portion bent in the second direction from the first electrode extension portion,
the first electrode extension portion is spaced apart from the second electrode in the second direction,
at least a portion of the first electrode bent portion overlaps the second electrode in a thickness direction, and
the light-emitting element is disposed between the first electrode extension portion, the first electrode bent portion, and the second electrode.
20. The display device of claim 19 , wherein
the second electrode includes:
a second electrode extension portion extending in the first direction; and
a second electrode bent portion bent in the second direction from the second electrode extension portion,
the second electrode extension portion is spaced apart from the first electrode extension portion,
the second electrode bent portion is spaced apart from the first electrode bent portion, and
the light-emitting element is disposed between the first electrode bent portion and the second electrode bent portion.