As illustrated in FIG. 3, display devices 310 and 320 (also respectively referred to as first and second display devices 310 and 320), and thin-film transistors 210 and 220 (also respectively referred to as first and second thin-film transistors 210 and 220) to which the display devices 310 and 320 are electrically connected, may be arranged in the display area DA of the substrate 100. FIG. 3 illustrates that organic light-emitting diodes as the display devices 310 and 320 are arranged in the display area DA. That is, in an exemplary embodiment, the display devices 310 and 320 may be organic-light emitting diodes. As the display devices 310 and 320 are electrically respectively connected to the thin-film transistors 210 and 220, pixel electrodes 311 and 321 are respectively electrically connected to the thin-film transistors 210 and 220.
