Helichromic-smectic liquid crystal compositions and display...

Details Helichromic-smectic liquid crystal compositions and display... Helichromic-smectic liquid crystal compositions and display...

C - Chemistry, Metallurgy

09

K

31/105, 345/8

C09K 19/06 (2006.01) C07C 205/06 (2006.01) C07F 3/02 (2006.01) C09B 1/20 (2006.01) C09B 1/50 (2006.01) C09B 1/54 (2006.01) C09B 1/56 (2006.01) C09B 5/24 (2006.01) C09B 19/02 (2006.01) C09B 23/01 (2006.01) C09B 23/10 (2006.01) C09B 29/01 (2006.01) C09B 29/08 (2006.01) C09B 29/15 (2006.01) C09B 29/28 (2006.01) C09B 29/36 (2006.01) C09B 31/02 (2006.01) C09B 31/16 (2006.01) C09B 33/04 (2006.01) C09B 35/00 (2006.01) C09B 56/00 (2006.01) C09B 57/00 (2006.01) C09K 19/54 (2006.01)

Patent

CA 1200970

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 heli- chromic 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 high contrast ratios.

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