A method for driving a plasma display panel is provided in which wasteful power consumption is reduced and light emission efficiency is improved when the number of cells to be lighted is relatively small. In one aspect, the present inventions are directed to methods and circuitry to control, adjust, determine andor modify the absolute andor relative positioning or location of reference current which is employed by sensing circuitry to sense the data state of a memory cell during a read operation of one or more memory cells. The maximum bend radius of the data cable is determined by the equation:2\u2062\u03c0\u0394\u2062\u2062DGD\u2062c\u03bbwherein \u03bb is optical wavelength and\u0394\u2062\u2062DGD=0. The support includes a rotation member, two driving members and two connecting members received in the two slots, respectively. In addition, the output port may be unbalanced, and the input port may be balanced. The dust cover has a fixed portion, a flexible portion connecting to the fixed portion, and a moving portion connecting to the flexible portion and having a label emplacement.