Patent ID: 7616287

Claim:
A liquid crystal display element comprising one or more sets of combinations of a pair of substrates having a pair of electrodes at least one of which is light transmitting, a liquid crystal layer composed of a liquid crystal composition indicating a cholesteric phase, said liquid crystal layer being disposed between said pair of substrates, and at least one layer of insulating thin film to insulate said liquid crystal layer from an electrode, wherein: said insulating thin film has an electrostatic capacity of not more than 10 μf; said liquid crystal layer has a layer thickness in the range of 2 to 5 μm; and said liquid crystal composition has a dielectric anisotropy in the range of 20 to 50, a specific resistance of 10 10 to 10 13 cm, a relative dielectric constant ∈1 in a planar state of 5 to 15, and a relative dielectric constant ∈2 in a focal conic state of 10 to 25.