An electronic device includes a substrate structure, a first conductive element, a second conductive element, a third conductive element, a fourth conductive element, and a side wiring. The substrate structure has a first surface, a second surface and a side surface connected between the first surface and the second surface. The first conductive element is disposed on the first surface of the substrate structure. The second conductive element is disposed on the first conductive element. The third conductive element is disposed on the second surface of the substrate structure. The fourth conductive element is disposed on the third conductive element. The side wiring is disposed on the side surface of the substrate structure and in contact with the second conductive element and the fourth conductive element. The side wiring, the second conductive element, and the fourth conductive element comprise at least one same material.

A display unit and a display panel are provided. The display unit includes a light-emitting structure and a connection structure disposed at a periphery of the light-emitting structure. The connection structure includes a substrate, a first conductive layer, an insulating layer, and a second conductive layer. The first conductive layer is disposed at a side of the substrate. The insulating layer is disposed at the side of the substrate and covers the first conductive layer. The insulating layer at a side of the first conductive layer away from the substrate defines at least one first through-hole to make part of the first conductive layer exposed. The second conductive layer is disposed at a side of the insulating layer away from the substrate. The second conductive layer is also disposed in the at least one first through-hole and electrically coupled with the first conductive layer.