Dip sealing a liquid crystal display panel
View Patent ↗A method of fabricating a liquid crystal display panel which achieves a reduction in sealing time and eliminates failure due to an excessive intake of a sealing material by utilizing a dip-type sealing apparatus capable of simultaneously sealing a plurality of liquid crystal injection inlets in a plurality of liquid crystal display panels. The liquid crystal display panel is fabricated by preparing first and second substrates, forming a sealant along the periphery of one of the first and second substrates, the sealant having an injection hole, introducing liquid crystals between the first and second substrates through the injection hole, and forming a sealing material in the injection hole by making dip-type contact between the sealing material and the injection hole.
1. A method of fabricating a plurality of liquid crystal display panels, each comprising the steps of:
preparing first and second substrates;
providing a sealant along the periphery of one of the first and second substrates, said sealant containing an injection hole;
introducing liquid crystals through the injection hole between the first and second substrates; and
forming a sealing material in the injection hole by making dip-type contact of the injection hole with the sealing material, wherein the injection holes of the plurality of liquid crystal display panels are simultaneously sealed with the sealing material, and the sealing material only seals the injection hole without overflow to the liquid crystals.
2. The method of claim 1 , wherein the sealing material is disposed in a tray where said dip-type contact is effected.
3. The method of claim 2 , wherein the plurality of liquid crystal display panels are positioned vertically on the tray with the injection holes touching the sealing material.
4. The method of claim 1 , further comprising hardening the sealing material formed on each injection hole.
5. The method of claim 4 , wherein the sealing material is hardened by applying UV-rays thereto.
6. The method of claim 4 , wherein the sealing material is hardened by applying heat thereto.
7. The method of claim 1 , further comprising forming a spacer on one of the first and second substrates.
8. The method of claim 1 , wherein the sealant is formed by a screen printing method.
9. The method of claim 1 , wherein the sealant is formed by a dispensing method.
10. The method of claim 1 , wherein the first substrate is prepared by:
forming scan and signal lines on the first substrate so as to cross with each other;
forming a thin film transistor at an intersection between the scan and signal lines;
forming a pixel electrode connected electrically to the thin film transistor; and
forming a first alignment layer on the first substrate.
11. The method of claim 10 , wherein the second substrate is prepared by:
forming a black matrix layer on the second substrate;
forming a color filter layer on the black matrix layer;
forming a common electrode on an entire surface of the second substrate; and
forming a second alignment layer on the second substrate.
12. The method of claim 1 , wherein the second substrate is prepared by:
forming a black matrix layer on the second substrate;
forming a color filter layer on the black matrix layer;
forming a common electrode on an entire surface of the second substrate; and
forming a second alignment layer on the second substrate.
13. The method of claim 1 , wherein an interval between the first and second substrates is sufficiently narrow so that the liquid crystals are prevented from flowing out through the injection hole.
14. The method of claim 13 , wherein the interval is 4-5 μm.
15. The method of claim 1 , wherein a container of the liquid crystals has a substantially same shape as a tray of the sealing material.