A display device, comprising: a lower substrate; a line electrode located at the lower substrate; a plurality of semiconductor light emitting devices electrically connected to the line electrode and configured to generate light, the plurality of semiconductor light emitting devices including red, green and blue semiconductor light emitting devices (R, G, B) that emit red, green and blue light, respectively, to form one pixel region, the plurality of semiconductor light emitting devices containing inorganic semiconductor materials; and a conductive adhesive layer that conducts electricity in a thickness direction thereof, the conductive adhesive layer comprising a body configured to combine the lower substrate with the semiconductor light emitting devices, and conductors dispersed within the body to electrically connect the lower substrate to the semiconductor light emitting devices, wherein the conductive adhesive layer blocks light generated from the plurality of semiconductor light emitting devices; wherein the semiconductor light emitting devices comprise: a first conductive semiconductor layer; an active layer located on the first conductive semiconductor layer; a second conductive semiconductor layer located on the active layer; wherein the display device further comprises: a first electrode electrically connected to the first conductive semiconductor layer; a second electrode electrically connected to the second conductive semiconductor layer, wherein the first electrode is disposed on a lower surface of the first conductive semiconductor layer, wherein the second electrode is disposed on a lower surface of the second conductive semiconductor layer, and wherein a reflective layer is located on a lower surface of the first conductive semiconductor layer. a lower substrate; a line electrode located at the lower substrate; a plurality of semiconductor light emitting devices electrically connected to the line electrode and configured to generate light, the plurality of semiconductor light emitting devices including red, green and blue semiconductor light emitting devices (R, G, B) that emit red, green and blue light, respectively, to form one pixel region, the plurality of semiconductor light emitting devices containing inorganic semiconductor materials; and a conductive adhesive layer that conducts electricity in a thickness direction thereof, the conductive adhesive layer comprising a first conductive semiconductor layer; an active layer located on the first conductive semiconductor layer; a second conductive semiconductor layer located on the active layer; wherein the display device further comprises: a first electrode electrically connected to the first conductive semiconductor layer; a second electrode electrically connected to the second conductive semiconductor layer, wherein the first electrode is disposed on a lower surface of the first conductive semiconductor layer, wherein the second electrode is disposed on a lower surface of the second conductive semiconductor layer, and wherein a reflective layer is located on a lower surface of the first conductive semiconductor layer. a first electrode electrically connected to the first conductive semiconductor layer; a second electrode electrically connected to the second conductive semiconductor layer, wherein the first electrode is disposed on a lower surface of the first conductive semiconductor layer, wherein the second electrode is disposed on a lower surface of the second conductive semiconductor layer, and wherein a reflective layer is located on a lower surface of the first conductive semiconductor layer.