Liquid crystal structure with improved dark state and the same use Direction projector

Reflective light valve for providing an improved dark state, wherein the reflective light valve includes: a transparent substrate; a twisted nematic liquid crystal layer having liquid crystal molecules having a director axis; and a back plane that is separated from the transparent substrate by the twisted nemantische liquid crystal layer, wherein the back plane consists of a lower substrate and an alignment layer, wherein the lower substrate includes reflective electrodes having edges, the director axis of the liquid crystal layer on the lower substrate due to the rubbing direction of the alignment layer is aligned parallel or perpendicular with respect to the edges of the reflective electrode, the reflective electrode having sawtooth edges, the segments of the individual saw-toothed edges of each reflective electrode 45 ° and are arranged to the incident polarization with respect to 135 ° at the angles.