Super Twisted Nematic Liquid Crystal Displays (STN LCDs) are fundamentally binary devices for displaying gray scale by combining temporal modulation (e.g., Frame Rate Control (FRC)) and spatial modulation (e.g., dither) techniques. Since dither reduces spatial resolution, temporal modulation is preferred to produce gray scaling. However, temporal FRC approach for gray scale produces visual artifacts, such as flicker, due to temporal sensitivity of the human visual system (HVS). Accordingly there is need for achieving high quality, such as 256, gray level frame rate control in simple and elegant manner, thereby eliminating need for conventional spatial dither which introduces objectionable patterns.
In particular, such need would be especially appropriate to provide desired improvement over conventional brute-force approach to 256 gray-scale graphics processing, for example, wherein 256.times.256 weight table (i.e., corresponding to storing "1" or "0" for each of 256 frames (i.e., rows) and 256 gray levels (i.e., columns)) is ordinarily employed to achieve FRC digital signal processing.