| abstract |
A colored liquid-crystal display device comprising a positive dielectric anisotropy nematic liquid-crystal layer (8) with the dielectric constant anisotropy, the liquid-crystal layer (8) having an optically active substance; a pair of electrode substrates (4,5) facing each other and sandwiching therebetween the positive dielectric anisotropy nematic liquid-crystal layer (8) in such a manner that the positive dielectric anisotropy nematic liquid-crystal is formed into a twisted structure with a fixed angle of twist of the liquid-crystal molecules, 0̸, of the positive dielectric anisotropy nematic liquid-crystal layer in the direction of a thickness d of the positive dielectric anisotropy nematic liquid-crystal layer; and a polarizer (9) and a analyzer (10) positioned outside of the pair of electrode substrates, respectively, wherein the twist angle 0̸ is set to be in the range of 180° to 300° and the product of the refractivity anisotropy Δn of the positive dielectric anisotropy nematic liquid-crystal and the thickness d of the positive dielectric anisotropy nematic liquid-crystal, Δn·d, is set to be in the range of 0.3 µm ot 0.7 µm. |