In another aspect of the present disclosure, the display device comprises: a first substrate; a data line disposed on the first substrate and extending along a data-line-extension direction; and plural pixel units disposed on the first substrate. Herein, each of the plural pixel units comprises: a transistor disposed on the first substrate, wherein the transistor comprises a first metal layer, a semiconductor layer and a second metal layer, the second metal layer is disposed on the semiconductor layer, and the first metal layer corresponds to the semiconductor layer; a first insulating layer disposed on the transistor, wherein the first insulating layer comprises an upper surface, and at least a via hole passing through the first insulating layer; a first electrode disposed on the first insulating layer, wherein the first electrode electrically connects to the second metal layer through the via hole; a pixel defining layer disposed on the first electrode and the first insulating layer, wherein the pixel defining layer exposes a part of the first electrode to define a light emitting region; a light emitting layer disposed on the first electrode; and a second electrode disposed on the light emitting layer. Herein, in a first pixel unit of the pixel units, the via hole has a first outline on the upper surface of the first insulating layer, and the light emitting region has a second outline on the upper surface of the first insulating layer; and the first outline has a first point, the second outline has a second point, a minimum distance between the first outline and the second outline is a distance between the first point and the second point, a first extension direction is an extending direction of a connecting line between the first point and the second point, and the first extension direction is not perpendicular and not parallel to the data-line-extension direction.