In exemplary embodiments, the electrode power supply line VSS is a wire that extends along at least one of the side ends of the substrate 100. For example, as described above, the electrode power supply line VSS may extend along the first edge E1, the third edge E3, and the second edge E2 of the substrate 100. A portion including both ends of the electrode power supply line VSS may be arranged near the fourth edge E4, as illustrated in FIG. 1. Since the electrode power supply line VSS is a wire having a width, the electrode power supply line VSS has an inner edge and an outer edge along its extension direction. For example, as illustrated in FIG. 2, the inner edge IE of the electrode power supply line VSS has a first portion P1 and a second portion P2. The inner edge IE refers to an edge that is adjacent to a center region of the substrate 100 with respect to an extension axis, which is crossing a width direction, along which the electrode power supply line VSS extends. The extension axis may cross a width direction of the electrode power supply line VSS. The first portion P1 of the inner edge IE is substantially parallel to the third edge E3 of the substrate 100. The second portion P2 of the inner edge IE refers to a portion that extends in a direction (the ?y direction) crossing the first portion P1, and thus extends away from a center of the substrate 100. As illustrated in FIG. 1, the power supply lines VDD are connected to one another at one end, and the first portion P1 and the second portion P2 of the electrode power supply line VSS may be arranged near the connections of the power supply lines VDD (e.g., a lower portion (in the ?y direction) of the substrate 100).