Display device and tiled display device

A tiled display device comprising a plurality of display modules,

• wherein each of a plurality of display modules comprising:
• a first substrate including a display area and a non-display area surrounding the display area;
• a light emitting device provided in the display area on the first substrate;
• a first pad portion provided in the non-display area on a top surface of the first substrate and disposed on one edge of the first substrate;
• a second substrate provided under a bottom surface of the first substrate;
• a second pad portion provided in the non-display area on a bottom surface of the second substrate and disposed on one edge of the second substrate;
• a side link line electrically connecting the first pad portion and the second pad portion;
• a side coating layer disposed to cover the side link line;
• a side protective layer disposed to cover at least a portion of the side coating layer;
• and
• a side sealing layer disposed to cover at least a portion of the side protective layer.