Liquid crystal displays and manufacturing methods thereof

Details Liquid crystal displays and manufacturing methods thereof Liquid crystal displays and manufacturing methods thereof

1998-05-18

2000-07-11

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

349189, 349190, G02F 11339

Patent

active

060864435

ABSTRACT:
Liquid crystal displays are manufactured by securing overlying first and second substrates with an intermediate sealant together such that they form a cell cavity with an injection opening. In one embodiment, a plurality of over-sized spacers are disposed intermediate the first and second substrates in the cell cavity. The first and second substrates are structurally secured by heat compressing the layers together with a pressure in the range of about 0.4-0.55 kg/cm.sup.2. A quantity of liquid crystal material is injected into the cell cavity through the injection opening to expand the substrate layers to a non-planar configuration. A second sealant is applied proximate to the injection opening and a second compressing step is used to facilitate the proper positioning of the second sealant into injection opening. The second compressing step employs a pressure about 0.1-1.0 kg/cm.sup.2 greater than the pressure in the first compressing step. In one embodiment, the second compressing step is delayed by about 3-20 hours after the injecting step. In another embodiment, the over-sized spacers arc sized such that they are 10-30% larger than the cell cavity gap. The liquid crystal display includes first and second substrate layers and a first sealant which define a cell cavity and spacers in the cell cavity which are compressed by about 10-30% relative to their uncompressed configurations.

REFERENCES:
patent: 5137484 (1992-08-01), Bohannon
patent: 5828435 (1998-10-01), Kato et al.

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