Pressure sealing apparatus and method for ferro-electric liquid crystal display with voltage application
View Patent ↗A pressure sealing apparatus and method for a ferroelectric liquid crystal display is disclosed for improving an alignment characteristic of a liquid crystal. In the apparatus and method, simultaneously with a pressurization of a liquid crystal display panel into which a liquid crystal has been injected, the liquid crystal display panel is subjected to a temperature treatment along with an application of an electric field.
1. A pressure sealing apparatus for a ferroelectric liquid crystal display, comprising:
an upper pressurizing plate;
a plurality of voltage-applying bars formed at an edge of the upper pressurizing plate;
a lower plate;
a liquid crystal display panel formed between the upper pressurizing plate and the lower plate; and
a heat coil formed at the interior of the upper pressurizing plate and the lower plate.
2. The pressure sealing apparatus of claim 1 , further comprising electrode pads formed on the voltage-applying bars.
3. The pressure sealing apparatus of claim 1 , further comprising a rib formed on the upper end of the voltage-applying bars.
4. The pressure sealing apparatus of claim 3 , wherein a spring is wound over the rib.
5. The pressure sealing apparatus of claim 1 , further comprising a voltage controller for applying voltage to the voltage-applying bars.
6. The pressure sealing apparatus of claim 1 , wherein a heat coil-receiving hole is formed at the interior of each of the upper pressurizing plate and the lower plate.
7. The pressure sealing apparatus of claim 6 , wherein a heat coil is formed in the heat coil-receiving hole.
8. The pressure sealing apparatus of claim 7 , further comprising a temperature controller for applying a current to the heat coil.
9. The pressure sealing apparatus of 1 , wherein the upper ends of the voltage-applying bars are provided in bar inserting holes formed in the upper pressurizing plate.
10. The pressure sealing apparatus of claim 9 , wherein the lower portion of the bar inserting holes are provided with a stopper protruding into the inner side of the bar inserting holes.
11. The pressure sealing apparatus of claim 1 , wherein the liquid crystal display panel includes:
a ferroelectric liquid crystal;
an upper substrate;
wherein the upper substrate includes a common electrode and an upper alignment film;
a lower substrate;
wherein the lower substrate includes a pixel electrode and a lower alignment film.
12. The pressure sealing apparatus of claim 11 , further comprising data shorting bars connected to a plurality of data signal wires at an edge of the lower substrate.
13. The pressure sealing apparatus of claim 12 , further comprising a plurality of data voltage-applying pads connected to the data shorting bars on an edge of the lower substrate.
14. The pressure sealing apparatus of claim 12 , wherein the data shorting bars connect the data signal wires to a ground voltage source.
15. The pressure sealing apparatus of claim 11 , further comprising gate shorting bars connected to a plurality of gate signal wires at an edge of the lower substrate.
16. The pressure sealing apparatus of claim 15 , further comprising a plurality of gate voltage-applying pads connected to the gate shorting bars on an edge of the lower substrate.
17. The pressure sealing apparatus of claim 15 , wherein the gate shorting bars connect the gate signal wires to a ground voltage source.
18. The pressure sealing apparatus of claim 11 , further comprising a plurality of Vcom pads provided at least two edges of the lower substrate to be connected to the common electrode.
19. The pressure sealing apparatus of claim 18 , wherein the Vcom pads are connected to the common electrode through Ag dots.
20. The pressure sealing apparatus of claim 11 , further comprising a gap formed between the upper substrate and the lower substrate.
21. The pressure sealing apparatus of claim 20 , wherein a sealant is formed in the gap.