1. A method for eliminating a ghosting effect of a liquid crystal display (LCD) device having a plurality of pixel elements, comprising: (a) calculating a threshold value for the maximum permissible change in the intensity value of a pixel element of the plurality of pixel elements from one frame of displayed video to a next frame of displayed video by multiplying a visual persistence period and a maximum color alternation speed of the LCD device; (b) for each pixel of the plurality of pixel elements, calculating a variation of an intensity level from one frame of input video data to a next frame of the input video data; (c) for each pixel of the plurality of pixel elements, if the variation of the intensity level of the pixel is greater than the threshold value, changing the intensity level of the pixel based upon the threshold value so as to make the variation of the intensity level of the pixel no greater than the threshold value; and (d) for each pixel of the plurality of pixel elements, if the variation of the intensity level of the pixel is greater than the threshold value, displaying the changed intensity level of the pixel rather than the intensity level of the pixel element from the input video data; wherein changing the variation of the intensity level in this manner minimizes the ghosting effect that is visible to a human viewing the LCD device.