Method and apparatus for manufacturing an LCD

• US 20060028611A1
• Filed: 06/20/2005
• Published: 02/09/2006
• Est. Priority Date: 06/22/2004
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kam, Do-young, Yu, In-kwang, Lee, Sung-jin, Shin, Jung-kun, Park, Goang-young
• Granted Patent: US 7,701,546 B2
• Time in Patent Office: Days
• US Class Current: 349/189
• CPC Class Codes: B32B 2037/1072 using a fluid jet
• CPC Class Codes: B32B 2457/20 Displays, e.g. liquid crystal displays, plasma displays
• CPC Class Codes: B32B 2457/202 LCD, i.e. liquid crystal displays
• CPC Class Codes: B32B 37/003 to avoid air inclusion
• CPC Class Codes: G02F 1/133528 Polarisers

Abstract

A method of manufacturing an LCD comprising, preparing a liquid crystal panel which comprises a substrate assembly and a polarizing plate, wherein the polarizing plate is attached to the substrate assembly, disposing a gas injecting part towards the plate surface of the liquid crystal panel, while the gas injecting part is exposed to atmospheric conditions, and applying a pressure to the plate surface of the liquid crystal panel by injecting gas through the gas injecting part. With this configuration, the present invention provides a method to remove bubbles between the polarizing plate and liquid crystal panel without the use of a chamber.

Claims

1. A method of manufacturing an LCD comprising:

preparing a liquid crystal panel which comprises a substrate assembly and a polarizing plate, wherein the polarizing plate is attached to the substrate assembly;

disposing a gas injecting part towards a plate surface of the liquid crystal panel, while the gas injecting part is exposed to atmospheric conditions; and

applying a pressure to the plate surface of the liquid crystal panel by injecting gas through the gas injecting part.

2. The method according to claim 1, wherein the liquid crystal panel and the gas injecting part move relative to each other, while the gas is injected.

3. The method according to claim 1, wherein the injected gas is preheated.

4. The method according to claim 3, wherein the temperature of the preheated gas is 40-80°

C.

5. The method according to claim 1, wherein the gas injecting part comprises a plurality of nozzles to inject the gas, which are disposed opposite each other while the liquid crystal panel is disposed therebetween.

6. The method according to claim 1, wherein a distance between the gas injecting part and the liquid crystal panel is 10-20 μ

m.

7. The method according to claim 1, wherein the pressure applied by the injecting gas is 0.1-6.0 kgf/cm².

8. The method according to claim 1, wherein the gas is initially injected to a central region in the liquid crystal panel and is later injected to an outer region of the plate surface of the liquid crystal panel.

9. An apparatus for manufacturing LCD, wherein the LCD comprises a liquid crystal panel comprising:

a compressed gas supply unit which supplies a compressed gas; and

a gas injecting part which is exposed to atmospheric conditions and injects the compressed gas from the compressed gas supply part, to apply a predetermined pressure to a surface of the liquid crystal panel.

10. The apparatus according to claim 9 further comprising a support part to support the liquid crystal panel.

11. The apparatus according to claim 9, wherein the gas injecting part comprises a plurality of nozzles to inject the gas, which are disposed as a plate-shape.

12. The apparatus according to claim 9, wherein an injecting area of the gas injecting part has a band-shape.

13. The apparatus according to claim 9, wherein an injecting area of the gas injecting part is smaller than a surface area of a polarizing plate of the liquid crystal panel.

14. The apparatus according to claim 9, wherein an injecting area of the gas injecting part is not smaller than the liquid crystal panel.

15. The apparatus according to claim 9, further comprising a second gas injecting part positioned opposite the gas injecting part such that the liquid crystal panel is positioned between the gas injecting part and the second gas injecting part.

16. The apparatus according to claim 9, further comprising a preheating part which preheats the gas.