Temporal Behavior of Liquid Crystal Molecules in Nematic Twisted Thin Film

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Abstract
The temporal behavior of the liquid crystal molecules after only a small number of applied alternating pulses (1 pulse width = 1 ms) are turned on is studied in the nematic twisted thin film (d = 9 km) by the observation of the temporal behaviors of the conoscopic figures. After the applied pulses (the numbers: n = 3 − 16, V = 5 ∼ 32 volts) are turned off, the conoscopic figures continue forming gradually for a few milli-seconds. The time required to form the conoscopic figures after a small number of the pulses are turned off depends only on the applied voltage. These times agree approximately with the time required to form the conoscopic figures clearly after the applied electric field is continuously turned on.