Liquid crystal cells – elements and systems – Nominal manufacturing methods or post manufacturing... – Changing liquid crystal phase
Reexamination Certificate
2005-01-18
2005-01-18
Nguyen, Dung T. (Department: 2871)
Liquid crystal cells, elements and systems
Nominal manufacturing methods or post manufacturing...
Changing liquid crystal phase
C349S088000, C349S172000, C349S187000
Reexamination Certificate
active
06844909
ABSTRACT:
A method of manufacturing a ferrodielectric liquid crystal display device includes the steps of injecting melted ferrodielectric liquid crystal in a cell formed between a lower structure body and an upper structure body each having a substrate, an electrode layer, and an orientation film and sealing the cell; cooling to obtain phase transitions of the ferrodielectric liquid crystal corresponding to a bookshelf structure; applying dc potentials to the electrode layers at temperature ranging from temperatures higher than phase transition temperatures to temperatures lower than phase transition temperatures, stopping the dc potential applications and cooling until below a predetermined temperature, and applying a reverse potential to the electrode layers and cooling again. The ferrodielectric liquid crystal display device produced by such a manufacturing method can display clear black-and-white states with the liquid crystal layers having a mono domain of the bookshelf structure.
REFERENCES:
patent: 6344889 (2002-02-01), Hasegawa et al.
patent: 6545738 (2003-04-01), Son et al.
Kim Chang-ju
Wang Jong-min
Caley Michael H
Nguyen Dung T.
Samsung Electronics Co,. Ltd.
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