1. An apparatus for driving a liquid crystal display device, comprising: a liquid crystal panel including a plurality of pixel regions to display images; and a liquid crystal panel driving controller for performing either a black data addressing method for time-division driving the liquid crystal panel or a gate pulse modulation method for converting a level of a gate-on voltage supplied to the liquid crystal panel, according to setting information from a user or a moving image or still image characteristic of a currently displayed image, wherein the liquid crystal panel driving controller includes a setting unit for generating a mode conversion signal corresponding to the moving image or still image characteristic by analyzing the setting information or externally input image data, wherein the setting unit includes a data comparator for comparing the image data of the previous frame with image data of a current frame and generating synchronous detection signals according to a comparison result, and a mode conversion signal generator for generating the mode conversion signal according to the setting information, or counting the synchronous detection signals, generates the mode conversion signal indicating the moving image characteristic or still image characteristic depending on whether the number of counts in units of a frame is above or below a number set by a user during a frame set by a user.