Patent ID: 7173587

Claim:
Process for addressing a bistable nematic liquid crystal dot matrix anchoring breakage screen having column electrodes and line electrodes, the process comprising: applying, to the column electrodes, a column signal whose characteristics are adapted to reduce the mean quadratic voltage of parasite pixel pulses between the column electrodes and the line electrodes that are not selected, wherein the mean quadratic voltage is reduced to a value lower than the FrÃ©ederickzs voltage in order to reduce parasitic addressing optical effects, the screen using a first and a second stable textures, wherein the first texture is uniform or slightly twisted, and the molecules of the first texture are substantially parallel to one another, and the second texture differs from the first texture in that the second texture has a twist of around +/âˆ’180Â°; and applying, to the column electrodes, the column signal whose duration is shorter than the duration of the last plateau of a line pulse of the line electrodes.