Patent ID: 7812903
Filing Date: 2010-10-12
Classification: G02F

Abstract:
1. Liquid crystal display device operating with a multiplexed addressing, comprising two substrates ( 10 , 20 ) provided with respective electrodes and located on either side of a layer of liquid crystal molecules ( 30 ), said electrodes forming rows on one of said substrates and forming columns on the other substrate, and means comprising an alignment layer having a rubbing direction, defining two stable states for the liquid crystal molecules when there is no electric field, characterized in that it also includes a mask ( 100 ) comprising transparent areas ( 120 ) only leaving visible the pattern of the areas it is wished to visualize, and opaque areas ( 110 ) covering the remainder of the surface of the display inter alia the zones non-addressed by said electrodes ( 12 , 22 ), and in that said electrodes ( 12 , 22 ) are conformed so that their edges are located in zones outside the transparent areas ( 120 ) of the mask ( 100 ), in that on at least one of the substrates ( 10 , 20 ) said electrodes are formed of blocks ( 28 ), in that each electrode block ( 28 ) consists of firstly elementary areas of the electrodes which are provided outside the opaque areas of the mask, and secondly intermediate zones located underneath the opaque areas ( 110 ) of the mask ( 100 ), said elementary areas of the electrodes and said intermediate zones of the electrodes being connected together, and in that the blocks cover the entirety of the substrate surface with the exception of interblock zones ( 281 ) of narrow width necessary to ensure electric insulation between the blocks, wherein the pattern of certain edges of the electrode blocks forms and angle in the order of 45° with the direction of rubbing, and at least one edge of an electrode is of “saw-tooth” type comprising elementary sections substantially oriented at 45° to the direction of rubbing.