Liquid crystal display device

Claim 1

A liquid crystal display device comprising a pair of electrode substrates placed oppositely and interposing there-between a nematic liquid crystal composition containing chiral material and having positive dielectric anisotropy and a helical structure of liquid crystal molecules twisted with respect to the thickness direction, and a pair of polarizers placed outside the electrode substrates, said device being characterized in that the liquid crystal molecules have a helical structure twisted at 160° to 260° with respect to the thickness direction, the polarization axes or absorption axes of the polarizers are inclined at an angle of 20° to 70° with respect to the direction of the major axes of the liquid crystal molecules adjacent to the electrode substrates and a product of Δn·d wherein Δn is reflective index anisotropy of the liquid crystals and d is a thickness of the liquid crystal layer in terms of μm being 0.7 to 1.2 μm, and said nematic liquid crystal composition comprises 5 to 60% by weight of at least one compound of the formula: ##STR81## wherein m and n are independently an integer of 1 to 7, 5 to 50% by weight of at least one member selected from the group consisting of compounds of the formula: ##STR82## wherein R 1 is an alkyl group having 2 to 7 carbon atoms, and 5 to 30% by weight of at least one compound of the formula: ##STR83## wherein R 2 is an alkyl group having 2 to 8 carbon atoms.