Abstract
The temperature dependence of the switching property has been investigated in τVmin mode ferroelectric liquid crystal (FLC) materials, which show a minimum in the response time–voltage curve. From the calculation based on the uniform switching model in an electric field, it is found that τVmin mode FLC materials can be improved to have a temperature-independent switching threshold voltage by optimizing the temperature dependences of dielectric anisotropy and spontaneous polarization. The dielectric anisotropy primarily originates from the smectic C host material and the spontaneous polarization from the chiral dopant one. Accordingly, practical FLC materials with wide operating temperature range have been developed by optimizing the combination of smectic C host and chiral dopant materials.
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