Dual frequency liquid crystals: a review |
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| Authors: | Haiqing Xianyu Shin-Tson Wu Chih-Lung Lin |
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| Institution: | 1. College of Optics and Photonics , University of Central Florida , Orlando, FL, 32816, USA hxianyu@creol.ucf.edu;3. College of Optics and Photonics , University of Central Florida , Orlando, FL, 32816, USA;4. Department of Electrical Engineering , National Cheng Kung University , Tainan, Taiwan |
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| Abstract: | We review the recent progress in developing high performance dual frequency liquid crystal (DFLC) materials. A new figure of merit is derived for evaluating the DFLC performance. The dielectric relaxation and electro-optical properties of several high performance compounds, which possess a positive dielectric anisotropy at low frequencies and a relaxation frequency in the kilohertz region, are presented. Potential applications of these compounds are discussed. Compounds with a negative dielectric anisotropy were also compared and discussed. Two experimental DFLC mixtures were demonstrated with one intended for room temperature operation and another for elevated temperature operation. |
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| Keywords: | dual-frequency liquid crystal dielectric relaxation figure of merit |
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