Compositions – Liquid crystal compositions – Containing pleochroic dye
Reexamination Certificate
2006-06-28
2008-09-23
Visconti, Geraldina (Department: 1795)
Compositions
Liquid crystal compositions
Containing pleochroic dye
C252S299010, C252S299630, C252S299640, C252S299650, C252S299660, C428S001100, C430S020000
Reexamination Certificate
active
07427364
ABSTRACT:
The present invention provides a liquid crystal composition obtained by dissolving a dichroic dye in a mixture of a cross-linked polymer having a liquid crystalline group in the side chains and a low molecular weight liquid crystal, and preferably the cross-linked polymer is a cross-linked siloxane polymer having a liquid crystalline group in the side chains, and the dielectric constant anisotropy of the liquid crystal composition is changed from positive to negative by increasing the frequency of the voltage to be applied. The present invention further provides a liquid crystal element containing the liquid crystal composition and a cross-linked siloxane polymer preferably usable for the liquid crystal composition.
REFERENCES:
patent: 5679414 (1997-10-01), Akashi et al.
patent: 9-33894 (1997-02-01), None
patent: 9-40955 (1997-02-01), None
Bucher et al., Applied Physics Letters, vol. 25, No. 4, Aug. 15, 1974, pp. 186-188.
Kato Takashi
Takaku Koji
Birch & Stewart Kolasch & Birch, LLP
FUJIFILM Corporation
Visconti Geraldina
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