Display device and method of manufacturing the same

1. A display device comprising:

a substrate;

a first electrode on the substrate;

a first structure on the first electrode;

a second electrode on the substrate and spaced apart from the first electrode;

a second structure on the second electrode; and

a plurality of light-emitting diodes on the first electrode and the second electrode,

wherein the plurality of light-emitting diodes are spaced apart from the first structure and the second structure,

wherein a height of an upper surface of the first structure and the second structure from the substrate is greater than a height of an upper surface of a light-emitting diode of the plurality of light-emitting diodes from the substrate, and

wherein the height of the upper surface of each of the first structure and the second structure is equal to or greater than a length of a light-emitting diode of the plurality of light-emitting diodes.

2. The display device of claim 1 , wherein an interval between the first electrode and the second electrode is less than a length of a light-emitting diode of the plurality of light-emitting diodes.

3. The display device of claim 1 , wherein an interval between the first structure and the second structure is greater than a length of a light-emitting diode of the plurality of light-emitting diodes.

4. The display device of claim 1 , wherein a width of a cross-section of the first structure and the second structure is not reduced in a direction that extends away from the substrate.

5. The display device of claim 1 , wherein a first width of the upper surface of the first structure and the second structure is greater than a second width of a lower surface of the first structure and the second structure.

6. The display device of claim 1 , wherein each of the first structure and the second structure comprises an organic insulating material in which scattering particles are dispersed.

7. The display device of claim 1 , further comprising:

a first connection electrode on the first electrode; and

a second connection electrode on the second electrode.

8. The display device of claim 7 , wherein the first connection electrode contacts the first electrode and a first end of a light-emitting diode of the plurality of light-emitting diodes, and

the second connection electrode contacts the second electrode and a second end of a light-emitting diode of the plurality of light-emitting diodes.

9. The display device of claim 1 , further comprising:

a pixel-defining layer over the substrate and in which an opening exposing an emission region is defined,

wherein the plurality of light-emitting diodes, the first structure, and the second structure are arranged in the emission region.

10. The display device of claim 9 , wherein the first structure and the second structure comprise a same material as that of the pixel-defining layer.

11. A display device comprising:

a substrate;

a first electrode on the substrate;

a first structure on the first electrode;

a second electrode on the substrate and spaced apart from the first electrode;

a second structure on the second electrode;

a plurality of light-emitting diodes on the first electrode and the second electrode;

a first connection electrode on the first electrode; and

a second connection electrode on the second electrode

wherein the plurality of light-emitting diodes are spaced apart from the first structure and the second structure,

wherein a height of an upper surface of the first structure and the second structure from the substrate is greater than a height of an upper surface of a light-emitting diode of the plurality of light-emitting diodes from the substrate,

wherein at least a portion of the first connection electrode is on the first structure, and

wherein at least a portion of the second connection electrode is on the second structure.

12. A display device comprising:

a substrate;

a first electrode on the substrate;

a first structure on the first electrode;

a second electrode on the substrate and spaced apart from the first electrode;

a second structure on the second electrode;

a plurality of light-emitting diodes on the first electrode and the second electrode;

a pixel-defining layer over the substrate and in which an opening exposing an emission region is defined; and

a capping layer filling the opening of the pixel-defining layer and covering lateral surfaces of the first structure and the second structure,

wherein the plurality of light-emitting diodes, the first structure, and the second structure are arranged in the emission region

wherein the plurality of light-emitting diodes are spaced apart from the first structure and the second structure,

wherein a height of an upper surface of the first structure and the second structure from the substrate is greater than a height of an upper surface of a light-emitting diode of the plurality of light-emitting diodes from the substrate, and

wherein a refractive index of a material of the first structure and the second structure is greater than a refractive index of a material of the capping layer.

13. A display device comprising:

a substrate;

a plurality of pixels arranged in a row direction and a column direction over the substrate;

a plurality of first power wirings extending in the column direction over the substrate and connected to pixels of the plurality of pixels arranged in a same column; and

a plurality of second power wirings extending in the row direction over the substrate and connected to pixels of the plurality of pixels arranged in a same row,

wherein each of the plurality of pixels comprises:

a plurality of first electrodes extending in a first direction over the substrate and electrically connected to a corresponding first power wiring;

a plurality of first structures extending in the first direction on the plurality of first electrodes;

a plurality of second electrodes extending in the first direction over the substrate and spaced apart from each of the plurality of first electrodes;

a plurality of second structures extending in the first direction on the plurality of second electrodes; and

a plurality of light-emitting diodes electrically connected to the first electrode and the second electrode,

wherein a height of an upper surface of the first electrode and the second electrode from the substrate is smaller than a height of an upper surface of a light-emitting diode of the plurality of light-emitting diodes from the substrate.

14. The display device of claim 13 , wherein each of the plurality of first structures is arranged on a central line of a corresponding first electrode among the plurality of first electrodes, and

each of the plurality of second structures is arranged on a central line of a corresponding second electrode among the plurality of second electrodes.

15. The display device of claim 13 , wherein a length of a light-emitting diode of the plurality of light-emitting diodes is longer than an interval between a first electrode of the plurality of first electrodes adjacent to a second electrode of the plurality of second electrodes, and is shorter than an interval between a first structure of the plurality of first structures adjacent to a second structure of the plurality of second structures.

16. The display device of claim 13 , wherein a first end of a light-emitting diode of the plurality of light-emitting diodes is on the first electrode and a second end of a light-emitting diode of the plurality of light-emitting diodes is on the second electrode.

17. The display device of claim 13 , further comprising:

a plurality of first connection electrodes on the plurality of first electrodes and extending in the first direction; and

a plurality of second connection electrodes on the plurality of second electrodes and extending in the first direction,

wherein each of the first connection electrode contacts a first electrode of the plurality of the first electrodes and a first end of a light-emitting diode of the plurality of light-emitting diodes, and each of the second connection electrode contacts a second electrode of the plurality of second electrodes and a second end of a light-emitting diode of the plurality of light-emitting diodes.

18. The display device of claim 13 , further comprising:

a pixel-defining layer over the substrate and in which openings exposing an emission region of the pixels are defined,

wherein the plurality of light-emitting diodes and the plurality of first structures and the plurality of second structures are arranged in the emission region, and a material of the plurality of first structures and the plurality of second structures is the same as a material of the pixel-defining layer.

19. The display device of claim 18 , further comprising:

a capping layer filling the openings of the pixel-defining layer and covering lateral surfaces of the plurality of first structures and the plurality of second structures,

wherein a refractive index of a material of the plurality of first structures and the plurality of second structures is greater than a refractive index of a material of the capping layer; and

a cross-section of the plurality of first structures and the plurality of second structures having an inverse-tapered shape from an upper surface of the plurality of first electrodes and the plurality of second electrodes.