Printing device, patterning method using the same, and method of fabricating a liquid crystal display device using the same
A printing device, a patterning method using the same and a method of fabricating an LCD device using the same are disclosed. The printing device includes a printing roll having a blanket adhered to an outer surface thereof; and an absorption nozzle to absorb solvent from the blanket. The absorption nozzle may include an absorber having a slit, a vacuum controller connected to the absorber, and a pipe connected to the vacuum controller.
1. A method of fabricating an LCD device comprising:
preparing first and second substrates; and
forming a liquid crystal layer between the first and second substrates,
wherein preparing the first substrate includes forming a pattern on the first substrate using a patterning method comprising:
coating a blanket adhered to an outer surface of a printing roll with a pattern material;
absorbing a solvent from the blanket of the printing roll using an absorption nozzle,
wherein the absorption nozzle includes a vacuum controller connected to an absorber and a pipe,
wherein the absorber includes a slit including a plurality of sub-slits, the vacuum controller includes a regulator including a plurality of sub-regulators, and the absorption nozzle is formed between the printing roll and a rail;
respectively regulating vacuum pressure applied to a respective sub-slit of the plurality of sub-slits on the absorber with a respective sub-regulator of the plurality of sub-regulators included on the vacuum controller such that the vacuum pressure applied to side-positioned sub-slits of the plurality of sub-slits is higher than the vacuum pressure applied to centrally-positioned sub-slits of the plurality of sub-slits; and
applying the vacuum pressure respectively controlled by the sub-regulator to the blanket of the printing roll through the respective sub-slit;
evaporating the solvent from the blanket by supplying air to the blanket of the printing roll;
rolling the printing roll on a printing plate to form a predetermined pattern on the printing roll; and
rolling the printing roll on the first substrate to transfer the predetermined pattern onto the first substrate.
2. The method of claim 1 , wherein the predetermined pattern corresponds to a color filter layer.
3. The method of claim 1 , wherein the predetermined pattern corresponds to a black matrix layer.
4. The method of claim 1 , wherein forming the liquid crystal layer includes: forming a sealant having an inlet in any one of the first and second substrates; bonding the first and second substrates to each other; and injecting liquid crystal into a space separating the first and second substrates through the inlet.
5. The method of claim 1 , wherein forming the liquid crystal layer includes: forming a sealant having no inlet in any one of the first and second substrates; dropping liquid crystal onto any one of the first and second substrates; and bonding the first and second substrates to each other.
6. The method of claim 1 , wherein coating the blanket adhered to the outer surface of the printing roll with the pattern material is performed using a printing nozzle.
7. The method of claim 1 , wherein a curvature of the absorber is substantially identical to a curvature of the printing roll.
8. The method of claim 1 , further comprising moving the absorption nozzle towards the printing roll and away from the printing roll.
9. The method of claim 8 , wherein moving the absorption nozzle is performed using a moving device that includes an absorption nozzle mover connected to the absorption nozzle and a driver to drive the absorption nozzle mover.
10. The method of claim 1 , wherein evaporating solvent from the blanket is performed using at least one air knife.
11. The method of claim 1 , further comprising cleaning the printing plate after rolling the printing roll on the first substrate to transfer the predetermined pattern onto the first substrate.