Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1997-02-26
1998-04-21
Gross, Anita Pellman
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
349191, G02F 1337
Patent
active
057423709
ABSTRACT:
A fabrication method for a liquid crystal alignment layer which has an excellent liquid crystal orientation efficiency and stability, and which can be mass-produced includes coating a thermoplastic polymer film on a transparent electrode to have a thickness of not less than 500.perp., fabricating a temporary cell with a structure of transparent electrode (ITO glass) / polymer film / liquid crystal / polymer film / transparent electrode (ITO glass) by attaching two transparent electrodes having polymer films coated thereon and infusing liquid crystal, fabricating a stack with a structure of transparent electrode (ITO glass)/polymer film /liquid crystal by contacting liquid crystal on the polymer film, heating the temporary cell or the stack at lower than phase separation temperature of a blend of liquid crystal and the polymer film, while applying a magnetic field exceeding 0.2 tesla, and cooling the temporary cell or the stack in the magnetic field at a cooling rate of not more than 100.degree. C. per minute.
REFERENCES:
patent: 4729847 (1988-03-01), Miyazawa et al.
patent: 4892392 (1990-01-01), Broer
Nissan Chemical Industries, Ltd., "Nissan Alignment Coatings for LCDs," 2 page listing.
John L. Janning "Thin Film Surface Orientation of Liquid Crystals," App. Phys. Letters, vol. 21 (1972), pp. 173-174.
Cho Hyun Nam
Kim Chung Yup
Kim Dong Young
Kim Young Chul
Lee Jun Young
Gross Anita Pellman
Korea Institute of Science and Technology
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