Display device with a heat dissipation substrate and a cover substrate

A display device comprising:

• a circuit substrate having a display area and a non-display area around the display area, the circuit substrate comprising a plurality of pads in the non-display area;
• a display substrate on a first surface of the circuit substrate and comprising a plurality of light emitting elements in the display area;
• a circuit board on one surface of the circuit substrate and having an opening corresponding to the display substrate, the circuit board comprising a plurality of circuit board pads corresponding to the pads and in direct contact with the pads;
• a cushion layer on the circuit board and not overlapping the display substrate;
• a cover substrate on the cushion layer and not overlapping the display substrate, the cover substrate having a plurality of first holes in a region that does not overlap the circuit board;
• a heat dissipation substrate on a second surface of the circuit substrate, the second surface being opposite to the first surface, the heat dissipation substrate having a plurality of second holes corresponding to the plurality of first holes;
• and
• a plurality of clamping parts inserted into ones of the first holes and the second holes.