摘要:
The liquid crystal device is constituted by disposing a display layer between a pair of electrode plates. The display layer comprises a porous polymer material having open pores partially filled and a low-molecular weight mesomorphic compound impregnating the porous polymer material. The display layer is free from an unfilled portion of the low-molecular weight mesomorphic compound to be effective for providing a liquid crystal device showing a high transmittance and a good contrast. The display layer also comprises a three dimensional network structure coated with a polymer layer, and a low-molecular weight mesomorphic compound impregnating the three-dimensional network structure. The display layer is free from a fibrous part which is unstable against an applied voltage to be effective for providing a liquid crystal device showing no hysteresis.
摘要:
The liquid crystal device is constituted by disposing a display layer between a pair of electrode plates. The display layer comprises a stretched porous polymer film having open pores and a low-molecular weight mesomorphic compound impregnating the polymer film. The display layer further comprises a porous polymer film having a three dimensional network structure characterized by a fibril diameter of at most 0.3 micron, and a low-molecular weight mesomorphic compound impregnating the polymer film. The display layer still further comprises a first display layer comprising a porous film and a low-molecular weight mesomorphic compound impregnating the porous film, and a second display layer comprising the low-molecular weight mesomorphic compound.
摘要:
A liquid crystal device is constituted by disposing a display layer between a pair of electrode plates. The display layer comprises a polymer having a surface energy of 25 dyn/cm or below and a low-molecular weight mesomorphic compound incompatible with the polymer. The display layer also comprises a porous film material having open pores and a low-molecular weight mesomorphic compound impregnating the porous film material, wherein the porous film material has a surface energy of 25 dyn/cm or below and is incompatible with the low-molecular weight mesomorphic compound.
摘要:
A display device is constituted by disposing a first display layer and a second display layer between a pair of electrode plates including at least one transparent electrode plate. The first display layer contains a low-molecular weight mesomorphic compound dispersed in or impregnating a polymer matrix. The second display layer is formed by disposing a diffraction grating and being filled with the low-molecular weight mesomorphic compound. The display device is incorporated in a display apparatus to effect a good display with a high contrast ratio.
摘要:
A liquid crystal device is constituted by disposing a display layer between a pair of electrode plates. The display layer comprises a mesomorphic polymer and a low-molecular weight mesomorphic compound. The mesomorphic polymer may preferably be a main chain-type ferroelectric mesomorphic polymer having an ester linkage or a mesomorphic polymer derived from a polymerizable mesomorphic compound. The display layer may preferably comprise a ferroelectric mesomorphic polymer having a dielectric anisotropy .DELTA..epsilon. of -3.0 or below and a low-molecular weight mesomorphic compound incompatible with the mesomorphic polymer and having a positive dielectric anisotropy.
摘要:
A liquid crystal device is constituted by disposing a display layer between a pair of electrode plates. The display layer comprises a mesomorphic polymer and a low-molecular weight mesomorphic compound. The mesomorphic polymer may preferably be a main chain-type mesomorphic polymer having an ester linkage or a mesomorphic polymer derived from a polymerizable mesomorphic compound. The display layer may preferably comprise a mesomorphic polymer having a dielectric anisotropy .DELTA..epsilon. of -3.0 or below and a low-molecular weight mesomorphic compound incompatible with the mesomorphic polymer and having a positive dielectric anisotropy.
摘要:
Provided is a polymeric liquid crystal copolymer compound having a repeating unit represented by the formula ##STR1## wherein A represents a polymeric main chain of a carbon type; and B represents a polyoxyalkylene group or ##STR2## wherein D represents ##STR3## b and c each representing an integer of 0 to 20; R represents an alkyl group, a phenyl group, a siloxy group or a polysiloxy group; R' represents an alkyl group or a phenyl group; and a represents an integer of 0 to 50.
摘要:
A chain polymeric liquid crystal compound having a structure expressed by the following general formula [I] as a flexible spacer and a chain polymeric liquid crystal copolymer compound, a polymeric liquid crystal composition containing at least one of their compounds and at least any one of a polymeric compound, a polymeric liquid crystal compound, a low molecular weight liquid crystal compound and a low molecular weight liquid crystal compound, a polymeric liquid crystal device which uses the same, and an apparatus and a method which use the polymeric liquid crystal device: ##STR1## (where X is --O--, --O--CH.sub.2 --CH.sub.2 --, --O--CH.sub.2 --, ##STR2## Y is --(CH.sub.2).sub.n -- (n=1 to 18), Z is a halogen atom, an alkyl group or an alkoxy group, and * is an asymmetric carbon atom).
摘要:
The present invention provides a polymeric liquid-crystal compound having a repeating unit represented by Formula (I) ##STR1## wherein U represents a polymer main chain; V represents --(CH.sub.2).sub.m --, --((CH.sub.2).sub.2 --O).sub.m -- or --(CH.sub.2).sub.n --((CH.sub.2).sub.2 --O).sub.p --, one or more of methylene hydrogen atoms of which may be substituted with an alkyl group, a halogen atom, a cyano group, an amino group or a carbonyl group, and m, n and p each represents an integer of 0 to 30; W represents a single bond, --O--, --OCO--, --COO--, --CONR.sup.1 --, --CO-- or --NR.sup.1, where R.sup.1 represents a hydrogen atom or an alkyl group; X represents two or more rings of a substituted or unsubstituted aliphatic ring or aromatic ring of benzene ring, heteroaromatic ring or condensed ring, which rings are bonded through a single bond, --O--, --OCO--, --COO--, --(CH.sub.2).sub.q --, --N.dbd.N--, --(CH.dbd.CH).sub.q --, --CH.dbd.N--, --(C.tbd.C).sub.q --, --CONR.sup.1 --, --(CO).sub.q --, or --NR.sup.1 --, where q represents an integer of 1 to 10; Y represents a substituted or unsubstituted alkyl group; and the mark * represents an asymmetric carbon atom.
摘要:
A chiral smectic main chain-type polymer liquid crystal includes mesogen units and a flexible chain group connecting the mesogen units having a length equal to or longer than 1,4-butylene group. The polymer liquid crystal is also characterized by having at least two units having mutually different optically active groups and having at least two recurring units which show mutually reverse helical rotations in its chiral smectic phase. Because of these features, the polymer liquid crystal can show an improved responsiveness because of its chiral smectic ferroelectricity based on an elongated helical pitch while retaining a good film-formability of a main chain-type polymer liquid crystal.