An electro-luminescence display panel and a driving method thereof for preventing a life shortening of the EL caused by a direct current are disclosed. Each block includes a graphical representation of upbeat and downbeat, and also includes a graphical representation of a musical beat and a musical note or rest. The first helical flowpath is sufficiently long to establish a stabilized rotating fluid flow pattern for the stream. Brackets are provided on upper portions of the center frames in such a manner as to extend upwardly therefrom. The web remains wrinkle-free to ensure that the surface of the web will contact the surface of the print head without gaps in contact coverage.