Dual frequency liquid crystals: a review
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.
Keywords: dielectric relaxation; dual-frequency liquid crystal; figure of merit
Document Type: Research Article
Affiliations: 1: College of Optics and Photonics, University of Central Florida, Orlando, FL, USA 2: Department of Electrical Engineering, National Cheng Kung University, Tainan, Taiwan
Publication date: 01 June 2009
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