To provide a liquid crystal composition having an improved displaying performance of moving picture by eliminating, or narrowing as much as possible, the temperature range of a ferroelectric phase in the immediately higher temperature than the temperature of an antiferroelectric phase.
A blended film is obtained by coating a polyimide, which is obtained by condensing a tetracarboxylic acid of formula I and a diamine of formula II, such that the film should be 200 thick. Into a cell having this film whose cell gap is fixed to 1.6 μm, an antiferroelectric liquid crystal composition, whose temperature range of a ferroelectric phase in the immediately higher temperature than the temperature of an antiferroelectric phase is eliminated or narrowed as much as possible, is injected. An antiferroelectric liquid crystal composition, which has a phase transition temperature of 60-100°C from an antiferroelectric phase to a higher temperature phase during a temperature rising process, and a 90% phase transition time of 5 ms, measured by a transmittance, from a ferroelectric phase set by applying an electric field at 30°C to an antiferroelectric phase set by nullifying the electric field, is obtained.
HASHIMOTO SHIGEJI
KOIDE SHUNICHI
