Liquid crystal cells – elements and systems – With specified nonchemical characteristic of liquid crystal... – Within smectic phase
Reexamination Certificate
2005-05-03
2005-05-03
Schechter, Andrew (Department: 2871)
Liquid crystal cells, elements and systems
With specified nonchemical characteristic of liquid crystal...
Within smectic phase
C349S171000
Reexamination Certificate
active
06888610
ABSTRACT:
A liquid crystal layer is formed by filling a space between alignment films provided on both glass substrates with a ferroelectric liquid crystal material having a spontaneous polarization. This ferroelectric liquid crystal exhibits a monostable state in which the average molecular axis of the liquid crystal molecular director is present in substantially one direction in the absence of an applied voltage. When a voltage of a first polarity is applied, the average molecular axis tilts from the monostable position to one side at an angle corresponding to the magnitude of the applied voltage, while, when a voltage of a second polarity having the opposite characteristic to the first polarity is applied, the average molecular axis tilts from the monostable position to a side opposite to the application of the voltage of the first polarity. A maximum tilt angle in the application of the voltage of the first polarity is not less than 35°, more preferably not less than 450°. With the use of a liquid crystal material having a large spontaneous polarization, a high-speed response is realized even when the applied voltage to the liquid crystal material is low.
REFERENCES:
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patent: 6323850 (2001-11-01), Katakura et al.
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patent: 6600544 (2003-07-01), Yoshihara et al.
Betsui Keiichi
Makino Tetsuya
Shiroto Hironori
Yoshihara Toshiaki
Schechter Andrew
Staas & Halsey
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