1992•Applied Physics LettersRequires access

Improvement of viewing angle characteristics in a twisted-nematic liquid-crystal display by using a cholesteric liquid-crystal compensation layer

Hitoshi Hatoh, Masahito Ishikawa, Junko Hirata, Yuzo Hisatake, T. Yamamoto

Abstract

Viewing angle characteristics of a twisted nematic (TN) liquid-crystal display (LCD) have been improved by inserting a planar aligned cholesteric liquid crystal compensating layer between the TN cell and a polarizer. Dependencies of the electro-optical characteristics of the novel LCD on the retardation, ratio of thickness to the pitch (dc/p) and twist-sense in the cholesteric layer are discussed. A thin-film transistor addressed LCD with a wide viewing angle has been developed based on this novel cell construction and its display performance is reported.

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Key concepts: Liquid crystal, Polarizer, Viewing angle, Liquid-crystal display, Materials science, Layer (electronics), Cholesteric liquid crystal, Planar