Display device using semiconductor light emitting diode
Discussed is a display device including: a base part; a plurality of assembly electrodes extending in a first direction and disposed at predetermined intervals on the base part; a dielectric layer stacked on the base part to cover the plurality of assembly electrodes; a barrier wall portion stacked on the dielectric layer to define a cell overlapping at least a portion of the plurality of assembly electrodes along the first direction of the plurality of assembly electrode; and a plurality of semiconductor light emitting devices disposed in the cell, wherein the plurality of semiconductor light emitting devices comprise a magnetic layer extending in a longitudinal direction that intersects the first direction.
1. A display device comprising:
a base part;
a plurality of assembly electrodes extending in a first direction and disposed at predetermined intervals on the base part;
a dielectric layer stacked on the base part to cover the plurality of assembly electrodes;
a barrier wall portion stacked on the dielectric layer to define a cell overlapping at least a portion of the plurality of assembly electrodes along the first direction of the plurality of assembly electrodes; and
a plurality of semiconductor light emitting devices disposed in the cell,
wherein the plurality of semiconductor light emitting devices comprise a magnetic layer extending in a longitudinal direction vertical to the first direction,
wherein the plurality of semiconductor light emitting devices respectively comprise a light emitting structure,
wherein the light emitting structure comprises a recessed portion intersecting a center portion of the light emitting structure, and
wherein the magnetic layer is disposed in the recessed portion of the light emitting structure.
2. The display device according to claim 1 , wherein the plurality of semiconductor light emitting devices respectively comprise:
a second conductivity type semiconductor layer;
an active layer disposed on a portion of the second conductivity type semiconductor layer; and
a first conductivity type semiconductor layer disposed on the active layer, and
wherein the magnetic layer is disposed on the second conductivity type semiconductor layer.
3. The display device according to claim 2 , wherein the plurality of semiconductor light emitting devices respectively comprise a symmetrical plane among arbitrary surfaces extending along a stacking direction of the plurality of semiconductor light emitting devices, and
wherein the symmetrical plane passes through a central portion of the plurality of semiconductor light emitting devices.
4. The display device according to claim 3 , wherein the symmetrical plane extends in the same direction as the longitudinal direction of the magnetic layer.
5. The display device according to claim 2 , wherein the plurality of semiconductor light emitting devices respectively comprise a first conductive electrode disposed on the first conductivity type semiconductor layer and a second conductive electrode disposed on the second conductivity type semiconductor layer.
6. The display device according to claim 5 , wherein the second conductive electrode is disposed on one surface of the second conductivity type semiconductor layer on which the active layer is disposed,
wherein the magnetic layer is disposed on another surface of the second conductivity type semiconductor layer opposite to the one surface, and
wherein the display device further comprises a first wiring electrode connecting the first conductive electrodes of the semiconductor light emitting devices arranged in the first direction and a second wiring electrode connecting the second conductive electrodes of the semiconductor light emitting devices arranged in a second direction.
7. The display device according to claim 5 , wherein the magnetic layer is disposed on one surface of the second conductivity type semiconductor layer on which the active layer is disposed, and
wherein the display device further comprises a first wiring electrode connecting the first conductive electrodes of the semiconductor light emitting devices arranged in the first direction and a second wiring electrode connecting the magnetic layers of the semiconductor light emitting devices arranged in a second direction.
8. The display device according to claim 5 , wherein the second conductive electrode is disposed on an outer portion of the second conductivity type semiconductor layer.
9. The display device according to claim 5 , wherein an area of one surface at a side of the first conductive electrode of the plurality of semiconductor light emitting devices is smaller than an area of another surface facing the one surface.
10. The display device according to claim 2 , wherein the plurality of semiconductor light emitting devices respectively further comprise an auxiliary bonding layer between the magnetic layer and the second conductivity type semiconductor layer.
11. The display device according to claim 2 , wherein each of the magnetic layer and the second conductivity type semiconductor layer comprises a concave-convex structure on surfaces facing each other.
12. The display device according to claim 5 , wherein the plurality of semiconductor light emitting devices respectively further comprise a reflective layer between the second conductive electrode and the second conductivity type semiconductor layer.
13. The display device according to claim 1 , wherein the plurality of semiconductor light emitting devices are assembled such that the longitudinal direction of the magnetic layer is perpendicular to an extending direction of the plurality of assembly electrodes that is parallel to the first direction.
14. The display device according to claim 3 , wherein the symmetrical plane includes a plane including an arbitrary line passing through the central portion of the plurality of semiconductor light emitting devices.
15. The display device according to claim 8 , wherein the second conductive electrode includes a pair of second conductive electrodes and each of the paired second conductive electrodes is disposed symmetrical along the longitudinal direction of the magnetic layer.
16. The display device according to claim 1 , wherein the cell is provided in a plurality, and
wherein the plurality of semiconductor light emitting devices are disposed in the plurality of cells, respectively.
17. The display device according to claim 1 , wherein the plurality of semiconductor light emitting devices respectively comprise a passivation layer disposed on a surface of each of the plurality semiconductor light emitting devices,
wherein the passivation layer covers the magnetic layer, and
wherein a portion of the passivation layer is in the recessed portion of the light emitting structure.
18. A display device comprising:
a plurality of assembly electrodes separated from each other, and extending in a first direction;
a dielectric layer covering the plurality of assembly electrodes;
a barrier wall portion on the dielectric layer defining a plurality of cells; and
a plurality of semiconductor light emitting devices disposed in the plurality of cell, respectively,
wherein each of the plurality of semiconductor light emitting devices comprises a magnetic strip extending from one side to an opposite side of each semiconductor light emitting devices
wherein each of the plurality of semiconductor light emitting devices comprises a light mitting structure,
wherein the light emitting structure comprises a recessed portion, and
wherein the magnetic strip is disposed in the recessed portion of the light emitting structure.
19. The display device of according to claim 18 , wherein the magnetic strip extends in a second direction that intersects the first direction.
20. The display device according to claim 1 , wherein the light emitting structure includes at least one of a substrate, an active layer, a conductive type semiconductor layer and a conductive electrode.