Liquid crystal cells – elements and systems – Nominal manufacturing methods or post manufacturing... – Aligning liquid crystal with means other than alignment layer
Patent
1998-03-10
1999-05-25
Dang, Hung Xuan
Liquid crystal cells, elements and systems
Nominal manufacturing methods or post manufacturing...
Aligning liquid crystal with means other than alignment layer
349156, 349188, G02F 11339
Patent
active
059073837
ABSTRACT:
A method for producing a liquid crystal display device including a pair of substrates and a liquid crystal layer held between the pair of substrates, wherein the liquid crystal layer includes a polymeric region and a liquid crystal region substantially surrounded by the polymeric region, and liquid crystal molecules in the liquid crystal region are axis-symmetrically oriented, the method including the steps of: injecting a precursor mixture containing a liquid crystal material and a polymerizable material between the pair of substrates; heating the precursor mixture to a first temperature which is equivalent to or higher than a miscible temperature of the precursor mixture; cooling the precursor mixture from the first temperature to a second temperature which is lower than the miscible temperature; forming the polymeric region substantially surrounding the liquid crystal region by polymerizing the polymerizable material; and providing a tilt angle to the liquid crystal molecules in a liquid crystal droplet phase-separated from the precursor mixture by continuously applying a prescribed external field to the precursor mixture at least while the precursor mixture is being cooled from the miscible temperature to the second temperature
REFERENCES:
patent: 5473450 (1995-12-01), Yamada
patent: 5627665 (1997-05-01), Yamada
patent: 5668651 (1997-09-01), Yamada et al.
Kume Yasuhiro
Kurihara Takashi
Majima Kenji
Conlin David G.
Dang Hung Xuan
Duong Tai V.
Neuner George W.
Sharp Kabushiki Kaisha
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