| Summary: | 碩士 === 國立臺北科技大學 === 光電工程系所 === 93 === The superior electro-optical characteristics of ferroelectric liquid crystal such as fast response and viewing angle have attracted a large considerable attention. However, ferroelectric liquid crystal can not exhibit gray levels due to its bisable and hysteresis. On the other hand, because FLC molecules have ±θ titled when the SmC* phase formed, the layer structure become chevron layer and cause the zig-zag defect. As a result,
In our research, we apply AC electric field to FLC cell during phase transition from N*-SmC*, and control the molecular axis by adjust the amplitude and frequency. In the conclusion, we find that apply low frequency AC electric field to FLC cell during phase transition from N*-SmC* exhibit Half-V shape transfer curve and form a uniform mono-domain alignment. On the other hand, apply suitable frequency AC electric field to FLC cell during phase transition from N*-SmC* exhibit V-shape transfer curve and form a uniform two-domain alignment.
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