Display device and manufacturing method thereof

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Provided is a display device including a light emitting unit that can emit a plurality of types of light having different wavelengths to the outside at a desired ratio with high intensity without increasing manufacturing costs in proportion to a number of pixels even when the number of pixels increases. Provided is a display device including a light emitting unit in which a plurality of types of PiN junction-type light emitting diodes that emit light having different wavelengths are arranged on the same substrate, and at least one type among the plurality of types of light emitting diodes has an active layer containing a rare earth element. Provided is a display device in which a plurality of types of light emitting diodes are sequentially stacked on the surface of a substrate, and a light emitting layer for one color is formed to overlap at least a portion of a light emitting layer for another color.