More specifically, when the connecting line with the minimum distance between the via hole 2621 and the light emitting region E1 is disposed to be perpendicular to the data-line-extension direction Y, which means the first extension direction Dir1 defined by the connecting line with the minimum distance between the first outline 2631 of the via hole 2621 (which is equal to the via hole 262 shown in FIG. 2) on the upper surface 261 of the first insulating layer 26 and the second outline 1611 of the light emitting region E1 (which is equal to the light emitting region E shown in FIG. 2) is substantially perpendicular to the data-line-extension direction Y, color mix between adjacent pixel units may be occurred if the gap between the via hole 2621 (which is equal to the via hole 262 shown in FIG. 2) and the light emitting region E1 is maintained; and therefore, the manufacture yield of the display device is reduced. In addition, in the aforementioned situation, the mask for forming the light emitting layer 152 has to be finer and more delicate. It could influence the overall light emitting efficiency of the OLED device. When the connecting line between the via hole 2621 and the light emitting region E1 is disposed to be parallel to the data-line-extension direction Y, which means the first extension direction Dir1 defined by the extending direction of the connecting line with the minimum distance between the first outline 2631 of the via hole 2621 (which is equal to the via hole 262 shown in FIG. 2) and the second outline 1611 of the light emitting region E1 (which is equal to the light emitting region E shown in FIG. 2) is substantially parallel to the data-line-extension direction Y, the region that the first electrode can be exposed therefrom is reduced if the arrangement of the via hole 2621 (which is equal to the via hole 262 shown in FIG. 2) in the display region is maintained; which means the area of the light emitting region E1 is reduced, resulting in the overall light emitting efficiency is reduced. However, if the gap between the light emitting regions E1 (which is equal to the light emitting region E shown in FIG. 2) and the via hole 2621 is increased to prevent the aforementioned situation, the numbers of the pixel units disposed in the display region is reduced. Hence, in the display device of the present disclosure, when the connecting line with the minimum distance between the via hole 2621 and the light emitting regions E1 is not aligned with the data line 251 which means that the light emitting regions E1 is not aligned with the via hole 2621, the manufacture yield of the display device can be improved without reducing the number of the pixel units in a limited display region.