Display device and tiled display device comprising same

The invention relates to a display device and a tiled display device comprising the same. The display device includes sub-pixels connected to a scan write line, a first data line, and a second data line. The sub-pixel includes: a light-emitting element; a first pixel driving unit configured to generate a control current according to a first data voltage of the first data line; a second pixel driving unit configured to generate a driving current applied to the light emitting element according to a second data voltage of a second data line; and a third pixel driving unit configured to apply the driving current to the light emitting element according to the control current of the first pixel driving unit. The first pixel driving unit includes: a first transistor generating a control current according to a first data voltage; a second transistor applying a first data voltage of the first data line to a first electrode of the first transistor according to a scan write signal of the scan write line; and a third tra