IMPROVEMENTS TO BISTABLE NEMATIC LIQUID CRYSTAL DISPLAYS

摘要

The invention concerns a method for addressing a bistable nematic matrix LCD having two stable textures without any applied electric field. Pixel addressing is of the passive multiplex type. The method is characterized in that it consists in selecting the value of the electrical voltage applied between the substrates so that an average value of said voltage, preferably the average quadratic value, since the initial command for image display up to the time immediately preceding switching, has a predetermined value independent of the information to be displayed, which is the same for all the pixels of the image. Preferably, to obtain the predetermined value of the average voltage, at least one equalizing pulse (842, 843) is applied on the column corresponding to the pixel to be switched.