A display device using a semiconductor light emitting device and a fabrication method thereof is disclosed. A display device includes a plurality of semiconductor light emitting device packages; a wiring substrate coupled to the plurality of semiconductor light emitting device packages; and a plurality of wiring electrodes. A semiconductor light emitting device package includes a plurality of semiconductor light emitting devices; a support substrate coupled to the plurality of semiconductor light emitting devices; and a conversion layer configured to convert a color of light emitted from at least some of the plurality of semiconductor light emitting devices to a different color, forming a red sub-pixel, a green sub-pixel, and a blue sub-pixel. A semiconductor light emitting device corresponding to the red or green sub-pixel and a semiconductor light emitting device corresponding to the blue sub-pixel may have light emitting areas that are of different sizes.