A source driver of an LCD includes a first and second power sources, a first and second inversion units, a first and second charging switches, and a first and second discharging switches. The upper ends of tubular legs are respectively coupled to outer ends of the arms for biased rotation between a deployed position extending downwardly and outwardly from the vertex and a contracted position disposed generally parallel to a vertical axis extending through the center of the vertex. The technique includes charging a first capacitor and a second capacitor each to a voltage that is about equal to a difference between a common mode voltage of a differential input voltage signal and a reference voltage. The centrifugal casting method can attain a decrease in average deposition rate. A method for filling and washing the filter includes the recirculation of a physiological saline in the dialysate circuit and the transfer of the physiological saline from the dialysate circuit to the blood circuit through the semi-permeable membrane.