Apparatus and method for fabricating liquid crystal display
View Patent ↗An apparatus for fabricating an LCD panel includes first and second alignment treatment units for performing alignment treatments on first and second base substrates, a seal pattern forming unit for forming at least one seal pattern on the alignment-treated first base substrate, a cleaning unit for cleaning the first base substrate on which the at least one seal pattern has been formed, a disconnection examining unit operatively coupled to the cleaning unit for examining the at least one seal pattern to determined the presence of defective breaks in the at least one seal pattern, first and second buffer units for temporarily holding the first and second base substrates, respectively, and an attaching unit for loading the temporarily held first and second base substrates and for attaching the loaded first and second base substrates.
1. A method for fabricating a liquid crystal display panel, comprising:
performing a first alignment treatment on a first base substrate;
performing a second alignment treatment on a second base substrate;
forming at least one seal pattern on the alignment-treated first base substrate;
aligning the first base substrate having the at least one seal pattern formed thereon;
driving a disconnection camera along the at least one seal pattern to detect an image of the at least one seal pattern and identify the presence of defective breaks in the at least one seal pattern;
comparing a detected line width of the at least one seal pattern detected by the disconnection camera with a predetermined reference line width of a predetermined reference seal pattern;
generating an alarm when the difference between the detected line width of the at least one seal pattern and the predetermined reference line width of the predetermined reference seal pattern exceeds a threshold value;
cleaning the first base substrate on which the at least one seal pattern has been formed; and
attaching the first and second base substrates via the at least one seal pattern.
2. The method of claim 1 , wherein forming the at least one seal pattern on the first base substrate comprises:
loading the first base substrate onto a table;
dispensing sealant onto the substrate through syringes; and
laterally translating at least one of the table and the syringes along left, right, forward, and backward directions while dispensing the sealant.
3. The method of claim 1 , wherein forming the at least one seal pattern on the first base substrate comprises:
aligning a patterned screen mask over the first base substrate, wherein the patterned screen mask selectively exposes regions of the first base substrate; and
applying a squeegee over the patterned screen mask to supply sealant to the regions of the first base substrate that are selectively exposed by the patterned screen mask.
4. The method of claim 1 , further comprising dispensing liquid crystal material on the first base substrate after performing the first alignment treatment but before attaching the first and second base substrates.
5. The method of claim 1 , further comprising dispensing liquid crystal material on the second base substrate after performing the second alignment treatment but before attaching the first and second base substrates.
6. The method of claim 1 , further injecting liquid crystal material into a cell gap formed between the attached first and second base substrates.
7. The method of claim 1 , further comprising:
forming a plurality of Ag dots on the second base substrate; and
forming spacers on the second base substrate prior to attaching the first and second base substrates.
8. The method of claim 7 , further comprising cleaning the second base substrate after forming the spacers.