Liquid crystal composition for use in liquid crystal display

1. A liquid crystal composition for liquid crystal display, comprising:

a liquid crystal material having a negative dielectric constant anisotropy; and

at least one reactive monomer,

wherein an amount of the at least one reactive monomer in the liquid crystal composition ranges from 0.05% to 10% by weight,

wherein the at least one reactive monomer is selected from those of formula (II):

A1-B1-M1-C1-B2-C2-B3-M2-A2  (II)

wherein A1 and A2 may be the same or different, and A1 and A2 are selected from the group consisting of acrylate, methyl acrylate, vinyl, vinyloxy, and epoxy groups;

B1 and B3 may be the same or different, and B1 and B3 are selected from the group consisting of 1,4-phenylene, diphenyl, naphthalene-2,6-diyl, and phenoxy groups;

B2 is selected from substituted or unsubstituted 1,4-phenylene groups;

C1 and C2 may be the same or different, and C1 and C2 are selected from —COO—, —OCO—, and —O—; and

M1 and M2 may be the same or different, and M1 and M2 are selected from alkanediyl groups

and in which n is an integer ranging from 0 to 11.

2. The liquid crystal composition for liquid crystal display according to claim 1 , further comprising another reactive monomer selected from those of formula (I):

A1-M1-B1-M2-C1-B4  (I)

wherein A1 is selected from the group consisting of acrylate, methyl acrylate, vinyl, vinyloxy, and epoxy groups;

B1 is selected from the group consisting of 1,4-phenylene, diphenyl, naphthalene-2,6-diyl, and phenoxy groups;

B4 is selected from a cholesteryl group, phenyl-oxy-alkyl groups, and phenyl-cycloalkyl groups;

C1 is selected from —COO—, —OCO—, and —O—; and

M1 and M2 are independently selected from alkanediyl groups

and in which n is an integer ranging from 0 to 11.

3. A liquid crystal display, comprising:

a first substrate and a second substrate, wherein the first substrate and the second substrate are vertically-aligned;

a liquid crystal layer intervened between the first substrate and the second substrate, wherein the liquid crystal layer contains liquid crystal molecules that are substantially vertical to a main surface of the first substrate when no electric field is applied to the liquid crystal layer; and

a polymer polymerized by at least one reactive monomer disposed on the first substrate and the second substrate respectively;

wherein the at least one reactive monomer is selected from those of formula (II):

A1-B1-M1-C1-B2-C2-B3-M2-A2  (II)

wherein A1 and A2 may be the same or different, and A1 and A2 are selected from the group consisting of acrylate, methyl acrylate, vinyl, vinyloxy, and epoxy groups;

B1 and B3 may be the same or different, and B1 and B3 are selected from the group consisting of 1,4-phenylene, diphenyl, naphthalene-2,6-diyl, and phenoxy groups;

B2 is selected from substituted or unsubstituted 1,4-phenylene groups;

C1 and C2 may be the same or different, and C1 and C2 are selected from —COO—, —OCO—, and —O—; and

M1 and M2 may be the same or different, and M1 and M2 are selected from alkanediyl groups

and in which n is an integer ranging from 0 to 11.

4. The liquid crystal display according to claim 3 , wherein the polymer has an acrylate polymer network structure with cholesteryl, phenyl-oxy-alkyl or phenyl-cycloalkyl side chain.

5. The liquid crystal display according to claim 3 , further comprising another reactive monomer selected from those of formula (I):

A1-M1-B1-M2-C1-B4  (I)

wherein A1 is selected from the group consisting of acrylate, methyl acrylate, vinyl, vinyloxy, and epoxy groups;

B1 is selected from the group consisting of 1,4-phenylene, diphenyl, naphthalene-2,6-diyl, and phenoxy groups;

B4 is selected from a cholesteryl, phenyl-oxy-alkyl groups, and or phenyl-cycloalkyl groups;

C1 is selected from —COO—, —OCO—, and —O—; and

M1 and M2 may be the same or different, and M1 and M2 are selected from alkanediyl groups

and n is an integer ranging from 0 to 11.

6. The liquid crystal display according to claim 3 , wherein B2 is selected from groups of formula (III):

wherein R 0 is selected from substituted and unsubstituted alkyl groups having from 1 to 6 carbon atoms, substituted and unsubstituted alkoxy groups having from 1 to 6 carbon atoms, halogen atoms, and alkenyl groups having from 1 to 6 carbon atoms; each of the alkyl and the alkoxy group may be interrupted by an unsaturated bond, an ether bond, a thioether bond and an ester bond.

7. The liquid crystal display according to claim 3 , wherein the at least one reactive monomer is selected from those having formulas of PLC-7199, PLC-7238, PLC-7212, PLC7223, and PLC7257:

wherein R is selected from alkyl-C m H 2m+1 , n is an integer ranging from 0 to 11, and m is an integer ranging from 0 to 11;

wherein X is an alkanediyl linking group

in which n is an integer ranging from 0 to 11;

wherein R 1 is selected from alkyl-C m H 2m+1 , n is an integer ranging from 0 to 11, and m is an integer ranging from 0 to 11;

wherein R 2 is selected from alkyl-C m H 2m+1 , n is an integer ranging from 0 to 11, and m is an integer ranging from 0 to 11; and

wherein R 3 is selected from alkyl-C m H 2m+1 , n is an integer ranging from 0 to 11, and m is an integer ranging from 0 to 11.

8. The liquid crystal composition for liquid crystal display according to claim 2 , wherein the reactive monomer selected from those of formula (I) is present in an amount less than the reactive monomer selected from those of formula (II).

9. The liquid crystal display according to claim 5 , wherein the reactive monomer selected from those of formula (I) is present in an amount less than the reactive monomer selected from those of formula (II).