Tualatin, Oregon-based In Focus Systems Inc, explains its new technique for making cheap passive matrix displays as fast as active matrix ones (CI No 1,857) by saying that it has developed a unique method for addressing the pixels to achieve video speeds without diminishing display brightness and contrast, calling the technique active addressing; the company says its prototype flat panel displays high-contrast, video-speed images with a 50mS response time and 30:1 contrast using proprietary algorithms that intelligently distribute many small pulses over the frame period rather than the single, large row select pulse characteristic of standard, multiplexed LCD drive methods; it expects to be able to improve further on the response time and contrast ratio; it does not envisage products before 1993.
