In a display device, the display device includes a substrate, a first conductive layer, a second conductive layer, a semiconductor layer, an opposite substrate and a display medium layer. The first conductive layer is disposed on the substrate and includes a trace portion extending along a first direction and a protrusive portion extending from the trace portion. The second conductive layer is disposed on the first conductive layer and includes a wiring portion extending along a second direction. The semiconductor layer is disposed between the first conductive layer and the second conductive layer. When viewed in a third direction perpendicular to the first direction and the second direction, the semiconductor layer is fully located in the first conductive layer, an edge of the semiconductor layer overlaps the trace portion, and another edge of the semiconductor layer overlaps the protrusive portion. The display medium layer is disposed between the substrate and the opposite substrate.