Ferroelectric liquid crystal devices using materials with a de Vries smectic A phase
First Claim
1. A method for identifying a chiral nonracemic liquid crystal material useful in both bistable SSFLC devices and analog devices comprising determining the presence of a deVries smectic A phase in a chiral nonracemic liquid crystal, the presence of the phase being indicative of that the material will exhibit bookshelf geometry and V-shaped switching when introduced into the appropriate FLC device configurations, wherein infrared dichroism measurements are made to determine the presence of the de Vries smectic A phase.
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Abstract
Bistable and analog FLC devices employing chiral nonracemic liquid crystal materials exhibiting de Vries smectic A phases. The invention provides certain liquid crystal material that can be employed in both bistable and analog device configurations. The invention also provides a method for identifying liquid crystal materials that will exhibit both bookshelf structure in SSFLC cells and provide V-shaped switching in an analog device configuration.
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Citations
9 Claims
- 1. A method for identifying a chiral nonracemic liquid crystal material useful in both bistable SSFLC devices and analog devices comprising determining the presence of a deVries smectic A phase in a chiral nonracemic liquid crystal, the presence of the phase being indicative of that the material will exhibit bookshelf geometry and V-shaped switching when introduced into the appropriate FLC device configurations, wherein infrared dichroism measurements are made to determine the presence of the de Vries smectic A phase.
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