Liquid crystal display and method for repairing alignment layer using the same
View Patent ↗A liquid crystal display includes a substrate, an alignment layer disposed on the substrate and in which a pinhole is defined in the alignment unit, the alignment layer including an alignment unit including a vertical functional group and a photoreactive group, and a repair layer filled in the pinhole, wherein the repair layer and the alignment unit include a solvent and polymers, and the solvent of the repair layer and the alignment unit includes at least two materials with the same content, and a polymer content of the repair layer is less than a polymer content of the alignment unit.
1. A method for repairing an alignment layer, comprising:
forming an alignment layer by drying an alignment solution;
determining a position of a pinhole defined in the alignment layer including a vertical functional group and a photoreactive group;
providing a repair solution in the pinhole; and
forming a repair layer by drying the repair solution, wherein
the repair solution and the alignment solution include a solvent and polymers; and
the solvent of the repair solution and the alignment solution includes at least two materials with the same content, and a polymer content of the repair solution based on a total content of the repair solution is less than a polymer content of the alignment solution based on a total content of the alignment solution.
2. The method of claim 1 , wherein
the repair solution includes about 40 wt % to about 50 wt % of N-methyl pyrrolidone, about 30 wt % to about 40 wt % of butyl carbitol, about 5 wt % to about 10 wt % of polycarbonate, about 5 wt % to about 20 wt % of an additive, and about 0.5 wt % to about 1.5 wt % of the polymer regarding an entire weight of the repair solution.
3. The method of claim 2 , further including
after the determining the position of the pinhole, checking whether the pinhole does or does not have a nucleus by photographing the pinhole using an optical instrument.
4. The method of claim 3 , wherein
the photoreactive group includes a reactive mesogen.
5. The method of claim 4 , wherein
the photoreactive group is selected from at least one of an acrylate and a methacrylate.
6. The method of claim 5 , wherein
the additive of the repair solution or the alignment solution includes 3-methoxy-N,N-dimethylpropionamide.
7. The method of claim 5 , wherein
viscosity of the repair solution is about 1.5 centipoise to about 3.0 centipoise.