Antiferroelectric liquid crystal and its manufacturing method

Details Antiferroelectric liquid crystal and its manufacturing method Antiferroelectric liquid crystal and its manufacturing method

2007-05-01

2007-05-01

Wu, Shean C (Department: 1756)

Compositions

Liquid crystal compositions

C252S299640, C252S299650, C252S299660, C252S299670

Reexamination Certificate

active

10515813

ABSTRACT:
Rod-like molecules (1) are admixed into a smectic C liquid crystal (2). According to the least-energy principle for electrostatic energy each rod-like molecule (1) has its permanent dipole moment aligned in a direction along a boundary layer between adjacent molecular layers of the liquid crystal and such permanent dipoles in adjacent boundary layers are aligned with their dipole moments opposed to each other in the direction of orientation. The character “<” bar regions of rod-like molecules (1) cause liquid crystal molecules inclined along their major axes to be axially inclined in an opposite direction every other layer whereby a smectic CAphase is formed in which the layer of liquid crystal molecules inclined in one direction and the layer of those inclined in the other direction alternate. Using a chiral smectic CAliquid crystal formed from chiral smectic C-phase liquid crystal molecules by substituting a terminal group of each such molecule with an optically active group gives rise to an antiferroelectric liquid crystal.

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CAPLUS 2000: 433692.
CAPLUS 2003: 580296.

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