Liquid crystal composition and liquid crystal element

Details Liquid crystal composition and liquid crystal element Liquid crystal composition and liquid crystal element

2008-03-25

2008-03-25

Wu, Shean C (Department: 1795)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

C252S299010, C252S299100

Reexamination Certificate

active

11410929

ABSTRACT:
A novel smectic liquid crystal composition is disclosed. The smectic liquid crystal composition comprises at least, a dichroic dye, a dual-frequency switchable nematic liquid crystal and a smectic liquid crystal. The dielectric anisotropy of the composition changes from a positive value to a negative value with increasing a frequency of a field applied to the composition. A novel liquid crystal device is also disclosed. The device comprises a pair of electrodes of which at least one is a transparent electrode, and a layer between the pair of electrodes comprising the smectic liquid crystal composition.

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D. Coates, Mol., “A Smectic A Phrase of Positive and Negative Dielectric Anisotropy,” Cryst. Liq. vol. 49 (Letters) 1978, pp. 83-87.

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