We have proposed and fabricated a thin ferroelectric liquid crystal device with large cone angle (45°), and studied its molecular switching behaviors. In the device, the molecular alignment direction is stabilized in rubbing direction of two polyimide alignment layers coated on substrates, by enhancing the influence of the anchoring effect of the alignment layers, where the rubbing strength is heightened and the liquid crystal thickness (1 μm) is small. The molecular alignment change from the rubbing direction occurs according to applied voltage, resulting in producing a V-shape electrooptic effect with continuous light modulation. As the alignment defects could be reduced by decreasing liquid crystal thickness, the device obtained a high contrast ratio of 250. We also considered a model of molecular alignment structure through measurement and simulation results of viewing-angle properties of the device.
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