1. A method of driving a plurality of pixels of a liquid crystal display (LCD) device when displaying a first frame and a second frame in sequence, the method comprising: detecting a gray-scale difference between the first frame and the second frame; determining a driving mode change between the first frame and the second frame based on the detected gray-scale difference; adjusting a ratio of first pixels, which are driven by a dynamic mode and are included in the plurality of pixels, to second pixels, which are driven by a static mode and are included in the plurality of pixels, in the second frame based on the determined driving mode change; and outputting gray-scale data based on the adjusted ratio.