US 7,695,777 B2 · Chlorofluorobenzene liquid crystal compound, liquid crystal composition and liquid crystal display device

Abstract

A liquid crystal compound selected from a group of compounds represented by formula (a): wherein Ra and Rb are each independently alkyl having 1 to 10 carbons, alkoxy having 1 to 9 carbons, alkoxyalkyl having 2 to 9 carbons, alkenyl having 2 to 10 carbons, alkenyloxy having 2 to 9 carbons, fluoroalkyl having 1 to 10 carbons or fluoroalkoxy having 1 to 9 carbons; ring A1, ring A2 and ring A3 are each independently trans-1,4-cyclohexylene, trans-1,3-dioxane-2,5-diyl, trans-tetrahydropyran-2,5-diyl, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,3-difluoro-1,4-phenylene, 2,5-difluoro-1,4-phenylene, 2,6-difluoro-1,4-phenylene, pyridine-2,5-diyl, 6-fluoropyridine-2,5-diyl or pyridazine-2,5-diyl; Z1, Z2 and Z3 are each independently a single bond, —(CH2)2—, —CH═CH—, —C≡C—, —CH2O, —OCH2—, —COO—, —OCO—, —OCF2—, —CF2O—, —CH2CH2OCF2— or —CF2OCH2CH2—; l, m and n are each independently 0, 1 or 2, provided that l+m+n is 0, 1, 2 or 3; one of X1 and X2 is fluorine, and the other is chlorine; Q is and atoms comprising the compound each may be an isotope thereof.

Claims17

Dependent claims

A liquid crystal compound comprising a compound selected from a group of compounds represented by formula (a):

wherein Ra and Rb are each independently linear alkyl having 1 to 10 carbons, linear alkoxy having 1 to 9 carbons, linear alkoxyalkyl having 2 to 9 carbons, linear alkenyl having 2 to 10 carbons, linear alkenyloxy having 2 to 9 carbons;
ring A1, ring A2 and ring A3 are each independently trans-1,4-cyclohexylene or 1,4-phenylene;
Z1, Z2 and Z3 are each independently a single bond or —(CH2)2—;
l, m and n are each independently 0, 1 or 2, provided that l+m+n is 0, 1, 2 or 3;
one of X1 and X2 is fluorine, and the other is chlorine;
Q is
and atoms comprising the compound each may be an isotope thereof.

4 more elements

A liquid crystal composition having a negative dielectric anisotropy and comprising two components, wherein the first component is at least one compound selected from a group of compounds represented by formulae (a-1), (a-2), (b-1) and (b-2), and the second component is at least one compound selected from a group of compounds represented by formulae (e-1) to (e-3):

wherein Ra1 is linear alkyl having 1 to 10 carbons or linear alkenyl having 2 to 10 carbons, and Rb1 is linear alkyl having 1 to 10 carbons or linear alkoxy having 1 to 9 carbons,
wherein
Ra11 and Rb11 are each independently alkyl having 1 to 10 carbons, alkoxy having 1 to 9 carbons, alkoxyalkyl having 2 to 9 carbons, alkenyl having 2 to 10 carbons, alkenyloxy having 2 to 9 carbons, fluoroalkyl having 1 to 10 carbons or fluoroalkoxy having 1 to 9 carbons;
ring A11, ring A12, ring A13and ring A14are each independently trans-1,4-cyclohexylene, trans-1,3-dioxane-2,5-diyl, trans-tetrahydropyran-2,5-diyl, 1,4-phenylene, 2-fluoro-1,4-phenylene or pyridine-2,5-diyl;
and
Z11, Z12 and Z13 are each independently a single bond, —CH2—CH2—, —CH═CH—, —C≡C—, —COO— or —CH2O—.

3 more elements

A liquid crystal composition having a negative dielectric anisotropy and comprising three components, wherein the first component is at least one compound selected from the group of compounds represented by formulae (a-1) to (a-3) and formulae (b-1) to (b-3),

wherein Ra1 is linear alkyl having 1 to 10 carbons or linear alkenyl having 2 to 10 carbons, and Rb1 is linear alkyl having 1 to 10 carbons or linear alkoxy having 1 to 9 carbons;
the second component is at least one compound selected from the group of compounds represented by formulae (e-1), (e-2) and (e-3):
wherein Ra11 and Rb11 are each independently alkyl having 1 to 10 carbons, alkoxy having 1 to 9 carbons, alkoxyalkyl having 2 to 9 carbons, alkenyl having 2 to 10 carbons, alkenyloxy having 2 to 9 carbons, fluoroalkyl having 1 to 10 carbons or fluoroalkoxy having 1 to 9 carbons;
ring A11, ring A12, ring A13 and ring A14 are each independently trans-1,4-cyclohexylene, trans-1,3-dioxane-2,5-diyl, trans-tetrahydropyran-2,5-diyl, 1,4-phenylene, 2-fluoro-1 4-phenylene or pyridine-2,5-diyl;
and Z11, Z12 and Z13 are each independently a single bond, —CH2—CH2—, —CH═CH—, —C≡C—, —COO— or —CH2O—;
and
the third component is at least one compound selected from the group of compounds represented by formulae (h-1), (h-2), (h-3), (h-4) and (h-5)
wherein
Ra22 is linear alkyl having 1 to 8 carbons or linear alkenyl having 2 to 8 carbons;
Rb22 is linear alkyl having 1 to 8 carbons, linear alkenyl having 2 to 8 carbons or alkoxy having 1 to 7 carbons;
Z24 is a single bond or —CH2CH2—;
and
Both Y1 and Y2 are fluorine, or one of Y1 and Y2 is fluorine, and the other is chlorine.

10 more elements

Dependencies are inferred from the claim text.

Chlorofluorobenzene liquid crystal compound, liquid crystal composition and liquid crystal display device

Life of this patent

Chlorofluorobenzene liquid crystal compound, liquid crystal composition and liquid crystal display device

Life of this patent

Abstract

Claims17