Helichromic-smectic liquid crystal compositions and display cell

Compositions – Radioactive compositions – Nuclear reactor fuel

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2522991, 2522996, 25229968, 2522997, 350349, C09K 334, G02F 113

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active

045140456

ABSTRACT:
A composition for use in thermally-addressable liquid crystal display devices, comprising a smectic liquid crystal material and a helichromic compound possessing both a chromophoric moiety and an optically-active moiety. The helichromic compound is a circularly dichroic dye capable of propagating incident visible light in a circularly polarized manner so that all polarizations of the incident light are absorbed. The composition comprising the helichromic compound can be utilized in thermally-addressable liquid crystal display devices to provide a display which operates at lower voltages, with faster response times, and higher contrast ratios.

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