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Abstract
Scientists working in the field of liquid crystals have become increasingly interested in the practical applications of dichroic dyes dissolved in liquid crystal matrices. This interest is due to a number of factors. Firstly an improved contrast of an image can be achieved in displays using this “guest-host” effect in comparison with displays solely using field effects or the “cholesteric-nematic” transition. Furthermore, utilization of dichroic dyes makes it possible to manufacture multi-coloured displays which do not require polarizers. This advance is a result of recent progress made in “quick-response” liquid crystalline materials and dichroic dyes with high order parameters in liquid crystal matrices.