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US 7,544,308 B2Granted
Dichroic dye and microencapsulated liquid crystal composition thereof
AssigneeIndustrial Technology Research Institute
InventorsShih-Hsien Liu, Yang-Chu Lin, Woan-Shiow Tzeng, Chih-Lin Su, Kung-Lung Cheng
Life of this patent
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Abstract
Dichroic dyes, compositions thereof, and liquid crystal compositions, microencapsulated liquid crystal compositions and liquid-crystal display elements employing the same. The dichroic dyes have high photostability in addition to excellent solubility. Furthermore, the liquid crystal composition employing the above dichroic dyes can have an orientational order parameter more than 0.7.
Claims21
A dichroic dye having a formula (I), of:
- or formula (II), of:
- wherein,
- X1 and X2 are the same or different and comprise —H, —OH, or —NH2;
- G1 is
- G2 is H, F, Cl, Br, —NH2, —NO2, or
- L is —CH═N—, —C≡C—C≡C—,
- P1 and P2 are the same or different and comprise —H, —R3, —OR3, —NHR3, —N(R3 )2, or
- wherein,
- X1 and X2 are the same or different and comprise —H, —OH, or —NH2;
- G1 is
- G2 is H, F, Cl, Br, —NH2, —NO2, or
- L is —CH═N—, —C≡C—C≡C—,
- P1 and P2 are the same or different and comprise —H, —R3, —OR3, —NHR3, —N(R3 )2, or
- A and B independently comprise O, S, or —NH—;
- Z1 and Z2 are the same or different and comprise O, S, —C═C—, —C≡C—, —CH═N—, —N═N—, —CH═N—,
- Ar1 and AR2 are the same or different and comprise the phenyl group, biphenyl group, naphthyl group, or heterocyclic group;
- AR3 and AR4 are the same or different and comprise the phenyl group, biphenyl group, or heterocyclic group;
- R1, R2 and R3 are the same or different and comprise H, C1-8 alkyl group, C1-8alkoxy group, hydroxyl group, C3-6 cycloalkyl group, C1-4 fluoroalkyl group, or —NCS;
- and
- n, m, i, and j are the same or different and comprise 0, 1, or 2.
17 more elements
A dichroic dye composition, comprising at least two dichroic dyes having a formula (I), of:
- or formula (II), of:
- wherein,
- X1 and X2 are the same or different and comprise —H, —OH, or —NH2;
- G1 is
- G2 is H, F, Cl, Br, —NH2, —NO2, or
- L is —CH═N—, —C≡C—C≡C—,
- P1 and P2 are the same or different and comprise —H, —R3, —OR3, —NHR3, —N(R3 )2, or
- A and B independently comprise O, S, or —NH—;
- Z1 and Z2 are the same or different and comprise O, S, —C═C—, —C≡C—, —CH═N—, —N═N—, —CH═N—,
- Ar1 and AR2 are the same or different and comprise the phenyl group, biphenyl group, naphthyl group, or heterocyclic group;
- AR3 and AR4 are the same or different and comprise the phenyl group, biphenyl group, or heterocyclic group;
- R1, R2 and R3 are the same or different and comprise H, C1-8 alkyl group, C1-8 alkoxy group, hydroxyl group, C3-6 cycloalkyl group, C1-4 fluoroalkyl group, or —NCS;
- and
- n, m, i, and j are the same or different and comprise 0, 1, or 2.
11 more elements
A microencapsulated liquid crystal composition, comprising a liquid crystal and a dichroic dye encapsulated in a wall formed of a polymer, wherein the dichroic dye has a formula (I), of:
- or formula (II), of:
- wherein,
- X1 and X2 are the same or different and comprise —H, —OH, or —NH2;
- G1 is
- G2 is H, F, Cl, Br, —NH2, —NO2, or
- L is —CH═N—, —C≡C—C≡C—,
- P1 and P2 are the same or different and comprise —H, —R3, —OR3, —NHR3, —N(R3 )2, or
- A and B independently comprise O, S, or —NH—;
- Z1 and Z2 are the same or different and comprise O, S, —C═C—, —C≡C—, —CH═N—, —N═N—, —CH═N—,
- Ar1 and AR2 are the same or different and comprise the phenyl group, biphenyl group, naphthyl group, or heterocyclic group;
- AR3 and AR4 are the same or different and comprise the phenyl group, biphenyl group, or heterocyclic group;
- R1, R2 and R3 are the same or different and comprise H, C1-8 alkyl group, C1-8 alkoxy group, hydroxyl group, C3-6 cycloalkyl group, C1-4 fluoroalkyl group, or —NCS;
- and
- n, m, i, and j are the same or different and comprise 0, 1, or 2.
11 more elements
A liquid crystal composition, comprising:
- a liquid crystal;
- and
- a dichroic dye having a formula (I), of:
- or formula (II), of:
- wherein,
- X1 and X2 are the same or different and comprise —H, —OH, or —NH2;
- G1 is
- G2 is H, F, Cl, Br, —NH2, —NO2, or
- L is —CH═N—, —C≡C—C≡C—,
- P1 and P2 are the same or different and comprise —H, —R3, —OR3, —NHR3, —N(R3 )2, or
- A and B independently comprise O, S, or —NH—;
- Z1 and Z2 are the same or different and comprise O, S, —C═C—, —C≡C—, —CH═N—, —N═N—, —CH═N—,
- Ar1 and AR2 are the same or different and comprise the phenyl group, biphenyl group, naphthyl group, or heterocyclic group;
- AR3 and AR4 are the same or different and comprise the phenyl group, biphenyl group, or heterocyclic group;
- R1, R2 and R3 are the same or different and comprise H, C1-8 alkyl group, C1-8 alkoxy group, hydroxyl group, C3-6 cycloalkyl group, C1-4 fluoroalkyl group, or —NCS;
- and
- n, m, i, and j are the same or different and comprise 0, 1, or 2.
14 more elements
Dependencies are inferred from the claim text.