A Sc^* ferroelectric liquid crystal with the N^*-Sc^* phase sequence was used. Through controlling the frequency and amplitude of the applying voltage during the N^*-Sc^* phase transition,the display of various molecular layer alignments was prepared and the V shaped or half V shaped electro-optical character with continuous gray scale was realized. Based upon the interacting theory between the spontaneous polarization and the torque of electric field,the reason for the alignment frame of different molecular layers of the display,the V shaped and half V shaped electro-optical character was analyzed.