Display device and manufacturing method thereof

The invention discloses a display device and a manufacturing method thereof, and the method comprises the steps: providing a substrate which is provided with a first surface and a second surface whichare opposite; forming a driving element layer on the first surface of the substrate; forming a protective layer to cover the driving element layer; forming at least one connection pad on the second surface of the substrate under the condition that the protection layer covers the driving element layer; arranging at least one light-emitting diode element on the driving element layer, so that the atleast one light-emitting diode element is electrically connected with the driving element layer; forming at least one conductive circuit pattern on a side surface of the substrate, and electrically connecting the driving element layer and the at least one connection pad, the side surface being connected between the first surface and the second surface; and arranging a driving chip on the second surface of the substrate to