A display device includes a circuit substrate including a driving circuit; an LED cell array disposed on the circuit substrate, and including a plurality of LED modules, each of the plurality of LED modules including at least two LED cells, from among a plurality of LED cells of the LED cell array, and an insulator coupling the at least two LED cells to each other; a gap-fill layer filling a gap between the plurality of LED modules; a partition disposed on the LED cell array, and defining a plurality of light emitting windows disposed in regions corresponding to the plurality of LED cells, respectively; and at least one color conversion layer disposed in at least a portion of the plurality of light emitting windows.