LIQUID CRYSTAL DEVICE AND MANUFACTURING METHOD OF THE SAME
A liquid crystal display and a manufacturing method are provided. A liquid crystal display according to an exemplary embodiment of the present invention includes a first substrate, a second substrate facing the first substrate, a field generating electrode disposed on at least one of the first substrate and the second substrate, an alignment layer disposed on the field generating electrode, and a liquid crystal layer interposed between the first substrate and the second substrate, including liquid crystal molecules and a second alignment polymer, wherein the first alignment polymer is formed by light-irradiating the alignment agent and the first alignment aids and the second alignment polymer is formed by light-irradiating the liquid crystal molecules and the second alignment aids, and the first alignment aids and the second alignment aids include a mesogen and a photo-polymerizable group coupled to the mesogen.
1 . A liquid crystal display comprising:
a first substrate;
a second substrate facing the first substrate;
a field generating electrode disposed on at least one of the first substrate and the second substrate;
an alignment layer disposed on the field generating electrode, the alignment layer comprising an alignment agent and a first alignment polymer; and
a liquid crystal layer interposed between the first substrate and the second substrate, the liquid crystal layer comprising liquid crystal molecules and a second alignment polymer,
wherein the first alignment polymer is formed by light-irradiating the alignment agent and first alignment aids, and the second alignment polymer is formed by light-irradiating the liquid crystal molecules and second alignment aids, and
wherein the first alignment aids and the second alignment aids comprise a mesogen and a photo-polymerizable group coupled to the mesogen.
2 . The liquid crystal display of claim 1 , wherein
the field generating electrode has a plurality of mini branches, and the width of the mini branches is in the range of 2 to 5 micrometers.
3 . The liquid crystal display of claim 1 , wherein
the first substrate is a thin film transistor substrate,
the second substrate is a common electrode substrate, and
the thin film transistor substrate comprises at least one of a color filter and a black matrix.
4 . The liquid crystal display of claim 1 , wherein
the first alignment aids and the second alignment aids are represented by Equation 1:
where m and n are independently 0 or 1.
5 . The liquid crystal display of claim 4 , wherein,
in Equation 1, A comprises a compound represented by one of Formulae 1 to 7:
6 . The liquid crystal display of claim 5 , wherein,
in Equation 1, Z1 and Z2 each independently comprise a compound represented by one of Formulae 8 to 12:
if morn is 0, A and B1, or A and B2, are single bonds.
7 . The liquid crystal display of claim 6 , wherein,
in Equation 1, B1 and B2 each independently comprise a compound represented by one of Formulae 13 and 14:
8 . The liquid crystal display of claim 5 , wherein,
in Formulae 1 to 7, an outer hydrogen atom is substituted with one of F, Cl, OCF3, OCH3, and an alkyl group of 1 to 6 carbon atoms.
9 . The liquid crystal display of claim 1 , wherein
the alignment agent is one of polyamic acid, a polyimide, and a polysiloxane.
10 . The liquid crystal display of claim 9 , wherein
the first alignment aids are included at 0.1 wt % to 20 wt % with respect to the total content of the alignment layer.
11 . The liquid crystal display of claim 1 , wherein
the second alignment aids are included at 0.01 wt % to 1.0 wt % with respect to the total content of the liquid crystal layer.
12 . A method for manufacturing a liquid crystal display, comprising:
forming a field generating electrode on at least one of a first substrate and a second substrate, the second substrate facing the first substrate;
forming an alignment layer on the field generating electrode, the alignment layer comprising an alignment agent and first alignment aids;
assembling the first substrate and the second substrate;
forming a liquid crystal layer between the first substrate and the second substrate, the liquid crystal layer comprising liquid crystal molecules and second alignment aids;
applying a voltage between the first substrate and the second substrate; and
forming a first alignment polymer and a second alignment polymer by light-irradiating the alignment layer and the liquid crystal layer, in a state in which the voltage is applied between the first substrate and the second substrate.
13 . The method of claim 12 , wherein
the field generating electrode has a plurality of mini branches, and the width of the mini branches is in the range of 2 to 5 micrometers.
14 . The method of claim 12 , wherein
the first alignment aids and the second alignment aids are represented by Equation 1:
where, m and n are independently 0 or 1.
15 . The method of claim 14 , wherein,
in Equation 1, A comprises a compound represented by one of Formulae 1 to 7:
16 . The method of claim 15 , wherein,
in Equation 1, Z1 and Z2 each independently comprise a compound represented by one of Formulae 8 to 12:
if morn is 0, A and B1, or A and B2, are single bonds.
17 . The method of claim 16 , wherein,
in Equation 1, B1 and B2 each independently comprise a compound represented by one of Formulae 13 and 14:
18 . The method of claim 15 , wherein,
in Formulae 1 to 7, an outer hydrogen atom is substituted with one of F, Cl, OCF3, OCH3, and an alkyl group of 1 to 6 carbon atoms.
19 . The method of claim 12 , wherein
the alignment agent is one of polyamic acid, a polyimide, and a polysiloxane.
20 . The method of claim 12 , wherein
the forming of the first alignment polymer and the second alignment polymer further comprises irradiating the light in a state in which the voltage is not applied after the light-irradiating.
21 . The method of claim 12 , wherein
the first substrate is a thin film transistor substrate,
the second substrate is a common electrode substrate, and
the thin film transistor substrate comprises at least one of a color filter and a black matrix.
22 . The method of claim 21 , wherein
the first substrate comprises a column spacer to form a cell gap within the liquid crystal molecules.
23 . The method of claim 22 , wherein
the column spacer is disposed between neighboring pixel areas.
24 . The method of claim 23 , wherein
the column spacer comprises a transparent material or an opaque material.
25 . The method of claim 24 , wherein
the black matrix and the column spacer are simultaneously formed.