Liquid crystal display, a method for manufacturing a liquid crystal display and a liquid crystal composition

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; and

a liquid crystal layer interposed between the first substrate and the second substrate, and comprising liquid crystal molecules and an alignment polymer,

wherein the alignment polymer is formed by light-irradiating the liquid crystal molecules and an alignment aid,

the alignment aid comprises a mesogen having halogen atoms and at least one photo-polymerizable group combined to the mesogen,

and wherein the alignment aid is electrically neutral or quasi-neutral.

2. The liquid crystal display of claim 1 , wherein

the halogen atoms are connected to an aromatic cyclic between the photo-polymerizable groups, and wherein the halogen atoms are disposed to be structurally symmetrical.

3. The liquid crystal display of claim 2 , wherein

the mesogen includes one of naphthalene, biphenyl, and bisphenol A combined with the halogen atoms.

4. The liquid crystal display of claim 3 , wherein:

the halogen atoms comprise one selected from fluorine, chlorine, bromine, and iodine.

5. The liquid crystal display of claim 4 , wherein

the photo-polymerizable group comprises at least one selected from an acryl group and a methacryl group.

6. The liquid crystal display of claim 5 , wherein

the alignment aid comprises at least one selected from compounds represented by Formulae 1 to 8:

7. The liquid crystal display of claim 1 , wherein

the alignment aid is included in an amount of about 0.1wt % to about 0.5wt % based on an amount of the liquid crystal molecules.

8. The liquid crystal display of claim 1 , wherein

the field generating electrode has a plurality of micro-slits.

9. The liquid crystal display of claim 1 , further comprising:

at least one of a color filter and a black matrix disposed on the first substrate, wherein the first substrate is a thin film transistor array panel and the second substrate is a common electrode panel.

10. A method for manufacturing a liquid crystal display comprising:

forming a first display panel including a pixel electrode;

forming a second display panel including a common electrode;

assembling the first display panel and the second display panel;

forming a liquid crystal layer including liquid crystal molecules and an alignment aid between the first display panel and the second display panel;

applying a voltage between the pixel electrode and the common electrode; and

light-irradiating the liquid crystal layer in a state in which the voltage is applied between the pixel electrode and the common electrode to polymerize the alignment aid,

wherein the alignment aid comprises a mesogen having halogen atoms and at least one photo-polymerizable group combined to the mesogen, and

wherein the alignment aid is electrically neutral or quasi-neutral.

11. The method of claim 10 , wherein

the halogen atoms are connected to an aromatic cyclic between the photo-polymerizable groups, and wherein the halogen atoms are disposed to be structurally symmetrical.

12. The method of claim 11 , wherein

the mesogen includes one of naphthalene, biphenyl, and bisphenol A combined with the halogen atoms.

13. The method of claim 12 , wherein

the halogen atoms comprises one selected from fluorine, chlorine, bromine, and iodine.

14. The method of claim 13 , wherein

the photo-polymerizable group comprises at least one selected from an acryl group and a methacryl group.

15. The method of claim 14 , wherein

the alignment aid includes at least one selected from compounds represented by Formulae 1 to 8:

16. The method of claim 10 , wherein

the voltage applied between the pixel electrode and the common electrode is a DC voltage applied in a range of about 5V to about 20V.

17. The method of claim 10 , further comprising

light-irradiating the liquid crystal layer in a state in which the voltage between the pixel electrode and the common electrode is off.

18. The method of claim 10 , wherein

an energy for the light-irradiating of the liquid crystal display in the state in which the voltage is applied between the pixel electrode and the common electrode is in a range of about 5 J/cm 2 to about 10 J/cm 2 .

19. The method of claim 10 , further comprising

at least one of a color filter and a black matrix disposed on the first display panel, and the light is irradiated to the liquid crystal layer through the second display panel, and wherein the first display panel is a thin film transistor array panel.

20. A liquid crystal composition comprising

liquid crystal molecules; and

an alignment polymer,

wherein the alignment polymer is formed by light-irradiating the liquid crystal molecules and an alignment aid, and

wherein the alignment aid comprises a mesogen having halogen atoms and at least one photo-polymerizable group combined to the mesogen, and wherein the alignment aid is electrically neutral or quasi-neutral.

21. The method liquid crystal composition of claim 20 , wherein

the halogen atoms are connected to an aromatic cyclic between the photo-polymerizable groups and wherein the halogen atoms are disposed to be structurally symmetrical.

22. The liquid crystal composition of claim 21 , wherein

the mesogen includes one of naphthalene, biphenyl, and bisphenol A combined with the halogen atoms.

23. The liquid crystal composition of claim 22 , wherein

the halogen atoms comprises one selected from fluorine, chlorine, bromine, and iodine.

24. The liquid crystal composition of claim 23 , wherein

the alignment aid comprises at least one selected from compounds represented by Formulae 1 to 8:

25. The liquid crystal composition of claim 20 , wherein

the alignment aid is included in an amount of about 0.1wt % to about 0.5wt % based on an amount of the liquid crystal molecules.