In an ion generating unit configured to control driving of a plurality of ion generating elements for generating ions by a controller, the controller drives the ion generating elements upon start up, and is configured to keep driving for a predetermined time period; thereby, the ion concentration of a space upon start up is quickly raised to a predetermined concentration. Crystal grains having a size in the same order as, or greater than, conventional grains are formed. Thereby, the molding compound covers the entire surface of the substrate, so that the bonding pads on the surface of the substrate will not be polluted. Pharmaceutical compositions, single unit dosage forms, and kits suitable for use in methods of the invention are also disclosed. A cover is mounted on the proximal end portion of the first wiper arm. In at least one embodiment, the method includes receiving an indication of selection of a key from a keyboard, including at least one of a polysemous symbol and a compilation symbol; and displaying a scene related to the selected at least one of a polysemous symbol and a compilation symbol.