Liquid crystal display device for providing sufficiently high contrast ratio and excellent response time

摘要

There is disclosed a liquid crystal display device which comprises a liquid crystal material aligned between a pair of substrates each having an oriented layer, characterized in that the following conditions (a) to (d) are satisfied: (a) the twisted angle of the liquid crystal molecule in the liquid crystal material aligned between the above pair of substrates is 200 DEG to 300 DEG ; (b) the angle created between the director direction of the liquid crystal molecule contacting at least one of the oriented layer surfaces of the above oriented layers and the substrate surface having the oriented layer is not less than 5 DEG ; (c) the following relationship formula (1) is valid between the spontaneous twisting pitch Ps of the liquid crystal molecule and the compulsively twisted pitch Pc of the liquid molecule when the arrangement of liquid crystal molecules is compulsorily regulated by the oriented layers: 0<(Pc-PS)/Pc