A system and method for driving a liquid crystal display having at least one segment. The gist of the present invention is that an inner diameter of a lower cylinder is altered without altering its thickness, and a displacement volume ratio between first and second rotary compression elements is set to an optimum value in accordance with the alteration. The method further can include determining a second set of coefficients for a second expression that calculates parasitic capacitance for a transistor structure according to a second plurality of parasitic capacitances derived from a plurality of three-dimensional transistor structures.