The microstructures MS may be arranged along the perimeter PAL of the 取向層 AL. The shape of the microstructure MS may be rectangle, triangle, trapezoid, circle, oval, polygon, or irregular shapes. The microstructure MS may be arranged in rows and columns with regular pitch or irregular pitch. An area of each of the microstructures MS measured in the top view may range from 1nm2 to 10mm2. In addition, the sealant SL may overlap the microstructures MS and also overlap a portion of the 取向層 AL.