Claims
- 1. Liquid crystal compound having the formula (I): ##STR136## wherein R1 is a C.sub.5 to C.sub.18 alkyl group and R.sub.2 is a C.sub.6 to C.sub.16 alkyl group and (A) is a 1,4-phenylene group or a 2,6-naphthylene group, which has S.sup.* (3) phase where the liquid crystal compound exhibits optically tristable states, and * indicates an asymmetric carbon.
- 2. A liquid crystal compound according to claim 1, said compound having the formula (III): ##STR137## wherein R1 is a C.sub.5 to C.sub.18 alkyl group and R.sub.2 is a C.sub.6 to C.sub.16 alkyl group, which has S.sup.* (3) phase where the liquid crystal compound exhibits optically tristable states, and * indicates an asymmetric carbon.
- 3. A liquid crystal compound according to claim 1, said compound having the formula (IV): ##STR138## wherein R2 and R.sub.3 are the same or different, and each represents a C.sub.6 to C.sub.16 alkyl group, which has S.sup.* (3) phase where the liquid crystal compounds exhibits optically tristable states.
Priority Claims (9)
Number |
Date |
Country |
Kind |
1-261804 |
Oct 1989 |
JPX |
|
1-302569 |
Nov 1989 |
JPX |
|
1-309709 |
Nov 1989 |
JPX |
|
1-321829 |
Dec 1989 |
JPX |
|
1-339482 |
Dec 1989 |
JPX |
|
2-12005 |
Jan 1990 |
JPX |
|
2-12006 |
Jan 1990 |
JPX |
|
2-181186 |
Jul 1990 |
JPX |
|
2-315142 |
Nov 1990 |
JPX |
|
RELATED APPLICATIONS
This is a divisional application of U.S. application Ser. No. 07/713,143 filed Jun. 11, 1991, U.S. Pat. No. 5,207,947, which was a continuation-in-part application of U.S. application Ser. No. 07/592,683 filed Oct. 3, 1990, abandoned.
US Referenced Citations (11)
Foreign Referenced Citations (5)
Number |
Date |
Country |
327349 |
Aug 1989 |
EPX |
330491 |
Aug 1989 |
EPX |
332392 |
Sep 1989 |
EPX |
339987 |
Nov 1989 |
EPX |
87707890 |
Dec 1987 |
WOX |
Non-Patent Literature Citations (4)
Entry |
J. Am. Chem. Soc. 1986, 108, 4736-4742. |
Japanese Journal of Applied Physics, vol. 27, No. 5, May, 1988, pp. L729-L732. |
Liquid Crystals, 1988, vol. 3, No. 9, 1245-1254. |
Yamawaki et al, Electro Optical Properties of Fluorine containing Ferroelectric Liquid Crystal Cells, Japan Display, 29 (1989). |
Divisions (1)
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Number |
Date |
Country |
Parent |
713143 |
Jun 1991 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
592683 |
Oct 1990 |
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