The present invention relates to a plasma display apparatus, and more particularly, to a plasma display apparatus for preventing Electromagnetic Interference. A connection component is adapted for securing the first component and the second component together in a secured interconnection. The compounds of formula I according to the present invention can effectively inhibit type V phosphodiesterase, and thus can be used for the treatment of various vascular disorders, such as male erectile dysfunction, pulmonary hypertension and the like. A badge that includes indicia identifying a person who carries the badge, a sensor to be used to detect a cleanliness state of the person’s hands, and a visible indicator to indicate to other people the cleanliness state of the person’s hands can be used in combination.