At least two TFTs which are connected with a light emitting element are provided, crystallinities of semiconductor regions composing active layers of the respective TFTs are made different from each other. If no appropriately sized variant exists, the enlarged character is assembled from a plurality of component glyphs that are stored with the font, wherein the component glyphs include an extender that may be duplicated within the assembled character in order to achieve the desired size. Preferably two reflective surfaces each in hemispherical shape and facing each other in a spherical arrangement are provided, with the wall structure across the diameter of the sphere. At least one of graphical, textual, statistical, metrics and status data is generated using a network database concurrently.