Method and apparatus of forming alignment layer for liquid crystal display device
A method for forming an alignment layer is disclosed, to prevent light leakage generated by a physical contact between a rubbing roll and a substrate, which includes preparing a substrate; coating an alignment material on the substrate, for initial alignment of liquid crystal; applying an electric field or a magnetic field to the alignment material, for determination of alignment direction in the alignment material; and curing the alignment material.
1. An alignment layer formation unit, comprising:
a substrate stage loading and moving a substrate on which an alignment material is coated;
an electric field generator, applying an electric field to the alignment material coated on the substrate, to determine an alignment direction of the alignment material; and
a curing part curing the alignment material at a temperature below 100° C., to fix the alignment direction of the alignment material determined by the electric field,
wherein the electric field generator includes an anode and a cathode opposing each other at both sides of the substrate stage.
2. An alignment layer formation unit, comprising:
a substrate stage loading and moving a flexible substrate on which an alignment material is coated;
a magnetic field generator applying magnetic field to the alignment material coated on the substrate, to determine an alignment direction of the alignment material; and
a curing part curing the alignment material at a temperature below 100° C., to fix the alignment direction of the alignment material determined by the magnetic field; and
wherein the magnetic field generator includes a pair of electromagnets, on which coil is wound, being opposing each other through the substrate stage or a horseshoe magnet surrounding the periphery of the substrate stage.
3. The unit of claim 1 , further comprising an alignment layer applicator before the electric field generator.
4. The unit of claim 2 , further comprising an alignment layer applicator before the magnetic field generator.
5. The unit of claim 3 , wherein the substrate stage is movable along the alignment layer applicator, the electric field generator, and the curing part.
6. The unit of claim 4 , wherein the substrate stage is movable along the alignment layer applicator, the magnetic field generator, and the curing part.
7. The unit of claim 1 , wherein the electric field generator is rotatable to vary a direction of the electric field applied, and
wherein the electric field is applied in the same direction as the alignment direction of the alignment material.
8. The unit of claim 2 , wherein the magnetic field generator is rotatable to vary a direction of the magnetic field applied, and
wherein the magnetic field is applied in the direction perpendicular to the alignment direction of the alignment material.
9. The unit of claim 2 , wherein the flexible substrate is a plastic material.