Patent ID: 6456349
Filing Date: 2002-09-24
Classification: G02F,G09G

Abstract:
A ferroelectric liquid crystal device comprising:upper and lower substrates, each being provided with electrodes on their respective surfaces, the substrates arranged with the electrode provided surfaces opposing each other; an insulating film formed on the electrodes on each of the substrates; an orientation film comprising an organic polymer, the film being formed on the insulating film and subjected to a uniaxial orientation treatment, the orientation film on each of the two substrates being arranged, wherein the orientation directions are the same; a liquid crystal composition with a chiral smectic C phase injected between the two substrates; drive means for switching an optical axis of the liquid crystals in the liquid crystal composition by selectively applying a voltage to the electrodes; and means for optically identifying the switching of the optical axis, in which when the drive means is operated, the liquid crystal composition can reverse its molecular direction near the substrate and show a chevron structure which bends in a dogleg shape as a layer structure when it shows the chiral smectic C phase wherein molecules of the liquid crystal composition that are arrayed in a field between a lightning defect and a hairpin defect appear to follow the lightning defect and to oppose a direction of the uniaxial orientation treatment and wherein a pretilt angle of the liquid crystal composition to the orientation film is 12Â° or more and less than 30Â° wherein a stable C1U orientation of 90% or more is obtained.