Blue-emitting phosphors for use with plasma display panels or other vacuum ultraviolet-excited devices are provided. The method includes detecting the servo signal using the readwrite head and calculating a timing interval between each of the pulses using a clock rate of a clock signal. The signal lines include scan lines, power supply lines, and ground lines which are connected to the plurality of subpixels. The drive motor drives the movable body to open and close the opening portion of the fixed body. Upon actuation of the release valve, the air pressure acts on the moveable wall to force water under pressure from the water pressure chamber so that a stream of water is ejected from the nozzle. The paste contains solids having a conductive substance and a resin, and solvent for dissolving the resin.