Patent ID: 6602563
Filing Date: 2003-08-05
Classification: C09K,G02F

Abstract:
A liquid crystal display which carries out matrix driving of a chiral nematic liquid crystal composition, which contains nematic liquid crystal and at least one kind of chiral agent and which is capable of displaying an image thereon continuously after an electric field applied thereto has been turned off, by applying an electric field to the nematic liquid crystal composition through a plurality of scan electrodes and a plurality of data electrodes which face and cross each other with the liquid crystal composition in-between, said liquid crystal display comprising:a driving section for driving the liquid crystal composition by a driving method which comprises a reset step of applying a reset pulse to cause the liquid crystal composition to come to a homeotropic state, a selection step of applying a selection pulse to select a final state of the liquid crystal composition and an evolution step of applying an evolution pulse to cause the liquid crystal composition to evolve to the selected final state and in which the selection of the final state of the liquid crystal composition is carried out by modulating the selection pulse; wherein the nematic liquid crystal contains a liquid crystalline compound which is expressed by the following formula (A) or (Aâ€²) R2: alkyl group, alkoxyl group, alkenyl group or fluoroalkyl group Q: alkyl group, alkoxyl group, alkenyl group, cyano group, fluorine atom or fluoroalkyl group J, K: 1, 4-phenylene group or 1, 4-cyclohexylene group m, n: integer from 0 to 4R2: alkyl group, alkoxyl group, alkenyl group or fluoroalkyl group Q: alkyl group, alkoxyl group, alkenyl group, cyano group, fluorine atom or fluoroalkyl group J, K, P: 1, 4-phenylene group or 1, 4-cyclohexylene group l, m, n: integer from 0 to 4.