Abstract— The electro‐optic behavior of antiferroelectric liquid‐crystal displays (LCDs) has been investigated. By choosing proper addressing waveforms, multiplex‐compatible analog gray‐scale driving schemes have been found. The schemes have been tested at different temperatures for assessing their use in real displays. A temperature range where both the addressing voltage and transmission slope are constant have been determined. A wider temperature range where the addressing voltage is shifted, but the transmission slope is still constant, has been found as well. These ranges include room temperature and warmer temperatures achieved by backlit displays.

This paper presents a first attempt at using the spectral moments method (SMM) to solve Maxwell's equations in twisted anisotropic media in the presence of defects. This numerical method, previously developed in condensed matter physics, allows computation of Green functions for very large systems. The dynamic matrix of the discretized system is built from the medium parameters. Green functions, calculated for a given source, representing a point source at infinity and given receiver, are developed as a continued fraction whose coefficients are related to the moments and directly computed from the dynamic matrix. In this study we compute the light transmitted through thin surface-stabilized ferroelectric liquid crystal cells with a chevron structure and a twisted director distribution. The efficiency and accuracy of the method are analysed by comparing the results obtained by SMM with the analytical solution obtained using the Jones matrix formalism. Finally, we apply SMM to compute the transmitted light with different director configurations. We show, by comparisons with experimental data, that the simplest director configuration is certainly the most probable.

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