A field-reversal method for measuring the parameters of a ferroelectric liquid crystal |
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| Authors: | V Panov J K Vij N M Shtykov |
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| Institution: | 1. Key Lab of Special Display Technology, Ministry of Education, National Engineering Lab of Special Display Technology, State Key Lab of Advanced Display Technology, Academy of Opto-Electronic Technology, Hefei University of Technology, Hefei, People’s Republic of Chinabozhilu@hfut.edu.cn;3. Key Lab of Special Display Technology, Ministry of Education, National Engineering Lab of Special Display Technology, State Key Lab of Advanced Display Technology, Academy of Opto-Electronic Technology, Hefei University of Technology, Hefei, People’s Republic of China;4. School of Instrument Science and Opto-electronic Engineering, Hefei University of Technology, Hefei, People’s Republic of China |
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| Abstract: | A method for measuring the spontaneous polarization P s, the switching time, the rotational viscosity γφ, and the d.c. conductivity σ is presented. The possibilities of estimating the azimuthal angle φ0, the dielectric anisotropy δε and the dielectric permittivity ε⊥ in the same experiment are also discussed. It is explicitly shown that the switching delay, though primarily dependent on the material and the applied field, is also dependent on the geometry of the cell. |
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| Keywords: | polymer-stabilised cholesteric texture helical twisting power electro-optical property polymer network |
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