Substrate assembly of display device using light-emitting diode and method for manufacturing same

A method for assembling multiple individual light emitting devices onto multiple individual device areas of a first substrate assembly including a partition wall defining the multiple individual device areas on a first substrate, a first hydrophobic film disposed on the partition wall, and a first electrode located on an individual device area among the multiple individual device areas, the method comprising:

• positioning, on the first hydrophobic film, a second substrate assembly including a second hydrophobic film disposed on and spaced, by a predetermined spacing, apart from the first hydrophobic film, a second electrode disposed on an insulating layer, and a second substrate disposed on the second electrode;
• injecting a fluid where the multiple individual light emitting devices are dispersed between the first substrate assembly and the second substrate assembly;
• allowing the multiple individual light emitting devices to flow by applying a voltage signal in a first frequency range to the first electrode;
• and
• assembling at least one of the multiple individual light emitting devices onto the first electrode by applying a voltage signal in a second frequency range greater than the first frequency range to the first electrode.

A method for assembling multiple individual light emitting devices onto multiple individual device areas of a first substrate assembly where the multiple individual device areas are divided from each other on a first substrate and a first electrode is located in an individual device area among the multiple individual device areas, the method comprising:

• positioning a second substrate assembly including a second substrate where a second electrode disposed on and spaced apart from the first substrate assembly is disposed;
• injecting a fluid where the multiple individual light emitting devices are dispersed between the first substrate assembly and the second substrate assembly;
• allowing the multiple individual light emitting devices to flow within the fluid by an electro-wetting phenomenon by applying a first voltage signal to the first electrode or the second electrode;
• and
• assembling at least one of the multiple individual light emitting devices onto the first electrode disposed within the individual device area by applying a second voltage signal to the first electrode or the second electrode.

A substrate assembly of a display device using a light emitting device, the substrate assembly comprising:

• a first substrate assembly including multiple individual device areas;
• and
• a second substrate assembly disposed on and spaced, by a predetermined spacing, apart from the first substrate assembly,
• wherein the substrate assembly is configured to allow multiple individual light emitting devices to flow or migrate and to assemble the multiple individual light emitting devices onto the multiple individual device areas,
• wherein the first substrate assembly includes:
• a first substrate;
• a partition wall disposed on the first substrate to define the multiple individual device areas;
• a first hydrophobic film disposed on the partition wall;
• and
• a first electrode disposed on an individual device area among the multiple individual device areas, and
• wherein the second substrate assembly includes:
• a second hydrophobic film disposed on the first hydrophobic film;
• an insulating layer disposed on the second hydrophobic film;
• a second electrode disposed on the insulating layer;
• and
• a second substrate disposed on the second electrode.