A plurality of rectangle semiconductor substrates are attached to a single mother glass substrate. A pixel structure is determined so that even if a gap or a an overlapping portion is generated in a boundary between a plurality of semiconductor substrates, a single-crystal semiconductor layer does not overlap with the gap or the overlapping portion. Two TFTs are located in a first unit cell including the first light emitting element, four TFTs are located in a second unit cell including the second light emitting element, and no TFT is located in a third unit cell including the third light emitting element. A boundary line is between the third unit cell and a fourth unit cell.