Display device using micro LED and modular display device using same

A display device comprising:

• a first substrate including a first electrode disposed on a first surface, a second electrode disposed on a second surface opposite to the first surface, and a third electrode connecting the first electrode and the second electrode;
• wherein the first surface is positioned inside the first substrate, and the first electrode is disposed between a top surface of the first substrate and the first surface,
• a second substrate disposed on the first substrate and including a connection wire defining a plurality of individual pixel regions, wherein the second substrate is configured to form an exposure portion exposing at least a portion of the first electrode at an edge side of the first substrate;
• a connection electrode contacting the exposed portion through a side surface of the second substrate to connect the first electrode of the first substrate and the connection wire of the second substrate;
• and
• a light emitting element connected to the connection wire of the second substrate,
• wherein the exposure portion includes a first exposure portion configured to expose an end portion of the first electrode and a second exposure portion configured to expose an end portion of a body of the first substrate.