Dielectric measurements for 10wt % W/O emulsion samples prepared with various surfactant concentrations between 0 and 10wt % were carried out in the frequency range of 40Hz up to 20GHz at room temperature during 2 hours at 15-minute intervals. Three distinct relaxation processes such as an electrode polarization in the kHz region, an interfacial polarization originated from ion dynamics on the interface of water and oil in MHz region, and an orientation polarization of oil molecules in the 100MHz region were observed. The relaxation time and relaxation strength of the interfacial polarization increased with time. These time dependences of the relaxation time and strength become more moderate with increasing surfactant concentration. In addition, these time dependences also suggest increasing water-droplet size and reflect stability of the dispersion system. In this study, all measurements were carried out with a cell type electrode, in which the water content was considered to be larger at the bottom of electrode, and the ε∞ value can be an indicator of the water content. The 1% surfactant W/O emulsion samples did not show an increase in the water content, but the relaxation time for the interfacial polarization increased much. This is an evidence of increasing water-droplet size, because the relaxation time of interfacial polarization is considered to reflect spatial scale of interface of water droplets. These results indicate a change in the W/O emulsion structure with time by dielectric spectroscopy.

By doping newly synthesized photo-curable monomers into FLC media and performing an appropriate photo-curing, we succeeded in fabricating novel Polymer-stabilized FLCDs exhibiting V shaped switching (PSV-FLCDs) with τ=100 μs to 200 μs and with a free from the temperature dependence of operating voltage within 3mV/°C in the range from -5°C to 50°C. We also demonstrate a field sequential full color LCD with 4 inch diagonal and 254ppi that is capable of displaying moving images without blurring and break.

We have performed molecular dynamics simulation of interface between liquid crystal and polyacrylate with different alkyl sidechain length, and qualitatively observed the same orientational behavior as experimental results. We also have analyzed the structure of the interface, concretely the distribution of orientational order parameter near the interface and the relationship between orientational direction of liquid crystal molecules and sidechain.

The Polymer Sustained Alignment (PSA) technology is widely used for Liquid Crystal Display (LCD) TV application etc., because of its high transmittance, high contrast ratio and fast response. In this study, we have developed a novel high reactive and high reliable monomer for PSA. Also we found UV irradiation condition had a huge impact on Image Sticking issue, we propose the optimal UV condition for our new monomer too.