Liquid crystal compound, ferroelectric liquid crystal...

Details Liquid crystal compound, ferroelectric liquid crystal... Liquid crystal compound, ferroelectric liquid crystal...

2007-03-23

2008-12-23

Wu, Shean C (Department: 1795)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

With viewing layer of specified composition

C252S299610, C544S310000, C549S004000, C549S059000, C549S066000

Reexamination Certificate

active

07468198

ABSTRACT:
A liquid crystal compound represented by the following formula is provided to enhance the contrast of a liquid crystal device using ferroeloctric liquid crystal:R1is an alkyl group having 4 to 6 carbon atoms. R2is an alkyl group having 6 to 18 carbon atoms or an alkoxy group having 6 to 18 carbon atoms. X1and X2are each independently hydrogen ox fluorine.

REFERENCES:
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patent: 5395551 (1995-03-01), Togano et al.
patent: 5413735 (1995-05-01), Yamashita et al.
Nonaka, T., et al., “Material characteristics of an active matrix LCD based upon chiral smectics.” 1999.Liquid Crystals, vol. 26, No. 11, pp. 1599-1602.

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