Liquid crystal display and method of manufacturing the same
View Patent ↗A liquid crystal display is provided. The liquid crystal display includes a first substrate; a second substrate facing the first substrate; an alignment layer disposed on at least one of the first substrate and the second substrate; a liquid crystal layer disposed between the first substrate and the second substrate; and a reactive mesogen included in the liquid crystal layer and represented by Chemical Formula 1.
1. A liquid crystal display comprising:
a first substrate;
a second substrate facing the first substrate;
an alignment layer disposed on at least one of the first substrate and the second substrate;
a liquid crystal layer disposed between the first substrate and the second substrate; and
a reactive mesogen included in the liquid crystal layer and represented by Chemical Formula 1:
wherein
in Chemical Formula 1, L is NH, CH 2 , O,
n is a natural number of 0 to 20, m is a natural number of 0 to 20, and X is a hydrogen, fluorine, or methyl group.
2. The liquid crystal display of claim 1 , wherein
the alignment layer includes a main chain and a side chain connected to the main chain, and the side chain is a photoinitiator and a vertical alignment group.
3. The liquid crystal display of claim 2 , wherein
the photoinitiator includes at least one of acrylate, methacrylate, and benzophenone.
4. The liquid crystal display of claim 3 , wherein
the alignment layer includes a copolymer represented by Structure Formula A:
5. The liquid crystal display of claim 4 , wherein
the alignment layer further includes a copolymer represented by Structure Formula B:
6. The liquid crystal display of claim 5 , wherein
a molar ratio of the copolymer of Structure Formula A and the copolymer of Structure Formula B is 5:5.
7. The liquid crystal display of claim 2 , wherein
the reactive mesogen included in the liquid crystal layer forms a bump in a surface of the alignment layer, and the bump includes an alignment polymer having a pre-tilt.
8. The liquid crystal display of claim 1 , wherein
the alignment layer includes a main chain and a side chain connected to the main chain, the side chain includes a main alignment auxiliary agent, and the main alignment auxiliary agent forms an alignment polymer having a pre-tilt.
9. The liquid crystal display of claim 8 , wherein:
the alignment layer includes a copolymer represented by Structure Formula C:
10. The liquid crystal display of claim 9 , wherein
the alignment layer further includes a copolymer represented by Structure Formula D:
11. The liquid crystal display of claim 10 , wherein:
the molar ratio of the copolymer of Structure Formula C and the copolymer of Structure Formula D has a range of 1:20 to 1:18.
12. The liquid crystal display of claim 1 , wherein
the liquid crystal molecules included in the liquid crystal layer are vertically aligned.
13. A method of manufacturing a liquid crystal display comprising:
forming a field generating electrode on at least one of a first substrate and a second substrate facing the first substrate;
forming an alignment layer including a main chain and a side chain connected to the main chain on the field generating electrode;
forming a liquid crystal layer including a liquid crystal molecule and a sub-alignment auxiliary agent between the first substrate and the second substrate; and
irradiating the liquid crystal layer while an electric field is applied to the liquid crystal layer,
wherein the side chain includes a main alignment auxiliary agent, the main alignment auxiliary agent forms an alignment polymer having a pre-tilt in the step irradiating the light, and
the sub-alignment auxiliary agent includes a reactive mesogen represented by Chemical Formula 1:
wherein
in Chemical Formula 1, L is NH, CH 2 , O,
n is a natural number of 0 to 20, m is a natural number of 0 to 20, an X is a hydrogen, fluorine, or methyl group.
14. The method of claim 13 , wherein
the alignment layer includes a copolymer represented by Structure Formula C:
15. The method of claim 14 , wherein
the alignment layer further includes a copolymer represented by Structure Formula D:
16. The method of claim 15 , wherein:
the molar ratio of the copolymer of Structure Formula C and the copolymer of Structure Formula D has a range of 1:20 to 1:18.
17. The method of claim 13 , wherein
the liquid crystal molecules included in the liquid crystal layer are vertically aligned.
18. A method of manufacturing a liquid crystal display comprising:
forming a field generating electrode on at least one of a first substrate and a second substrate facing the first substrate;
coating an alignment material and an alignment auxiliary agent on the field generating electrode;
forming a liquid crystal layer including a liquid crystal molecule between the first substrate and the second substrate; and
baking the alignment material to form an alignment layer including a main chain and a side chain connected to the main chain;
eluding the alignment auxiliary agent into the liquid crystal layer; and
irradiating a light while an electric field is applied to the liquid crystal layer,
wherein the side chain includes a photoinitiator,
the alignment auxiliary agent eluded into the liquid crystal layer forms a bump in a surface of the alignment layer, and the bump includes an alignment polymer having a pre-tilt.
19. The method of claim 18 , wherein
the alignment auxiliary agent includes a reactive mesogen represented by Chemical Formula 1:
wherein
in Chemical Formula 1, L is NH, CH 2 , O,
n is a natural number of 0 to 20, m is a natural number of 0 to 20, and X is a hydrogen, fluorine, or methyl group.
20. The method of claim 19 , wherein
the photoinitiator includes at least one of acrylate, methacrylate, and benzophenone.
21. The method of claim 20 , wherein
the alignment layer includes a copolymer represented by Structure Formula A:
22. The method of claim 21 , wherein
the alignment layer further includes a copolymer represented by Structure Formula B:
23. The method of claim 22 , wherein
the molar ratio of the copolymer of Structure Formula A and the copolymer of Structure Formula B is formed to be 5:5.
24. The method of claim 19 , wherein
the liquid crystal molecules included in the liquid crystal layer are vertically aligned.