Patent ID: 7616180

Claim:
A bistable nematic liquid-crystal matrix display device comprising: two substrates having row electrodes placed on one of the two substrates, column electrodes placed on the other of the two substrates and nematic liquid crystal molecules placed between the two substrates, said row electrodes and column electrodes having respective perpendicular directions and defining at their intersection a matrix of pixels and said row and column electrodes receiving electrical control signals generating an electrical field perpendicular to the substrates which is applied to the nematic liquid crystal molecules and anchoring layers deposited on the row and column electrodes, said anchoring layers defining an anchoring alignment direction of the nematic liquid crystal molecules, wherein the application of a selection signal on a row while applying simultaneously column signals on the column electrodes determines the final state of each pixel of a selected row, and applying such selection signal in succession on each row allowing to select successively each row of the display, in which the transition into at least one of two bistable states is brought about by displacement of the liquid crystal in a displacement direction parallel to the anchoring alignment direction, characterized in that the anchoring alignment direction is not parallel to the direction of the row electrodes, so that addressing the various pixels of the display, by successive selection of the row electrodes does not switch simultaneously two pixels that are contiguous in the displacement direction.