Claims
- 1. A benzene derivative of formula Ib ##STR28## wherein R denotes an alkyl or halogenoalkyl residue of up to 12 C atoms wherein one or two non-adjacent CH.sub.2 groups may also be replaced by -0- and/or -HC=pH-,
- A is a ring of the formula (1) ##STR29## Q is 1,4-phenylene.
- 2. Liquid crystalline medium being a mixture of at least two compounds, characterized in that at least one compound is a benzene derivative according to claim 1.
- 3. Liquid crystal display device, characterized in that it contains a liquid crystalline medium according claim 1.
- 4. A benzene derivative of formula Ic ##STR30## wherein R is an alkyl or halogenoalkyl residue of up to 12 C atoms wherein one or two non-adjacent CH.sub.2 groups may also be replaced by -0- and/or -HC=CH-, and the radical A is trans-1,4-cyclohexylene or 1,4-phenylene.
- 5. A liquid crystalline medium being a mixture of at least two compounds, wherein at least one compound is a benzene derivative according to claim 4.
- 6. A liquid crystal display device containing a liquid crystalline medium according to claim 4.
- 7. A benzene derivative of formula Id ##STR31## wherein R is an alkyl or halogenoalkyl residue of up to 12 C atoms wherein one or two non-adjacent CH.sub.2 groups may also be replaced by -O- and/or -HC=CH-.
- 8. A liquid crystalline medium being a mixture of at least two compounds, wherein at least one compound is a benzene derivative according to claim 7.
- 9. A liquid crystal display device containing a liquid crystalline medium according to claim 7.
Priority Claims (3)
Number |
Date |
Country |
Kind |
8912339 |
May 1989 |
GBX |
|
8913441 |
Jun 1989 |
GBX |
|
8913442 |
Jun 1989 |
GBX |
|
Parent Case Info
This application is a continuation of application Ser. No. 07/572,976 , filed Jul. 31, 1990, now abandoned.
US Referenced Citations (9)
Foreign Referenced Citations (5)
Number |
Date |
Country |
3902328 |
Aug 1990 |
DEX |
60-56932 |
Apr 1985 |
JPX |
2086385 |
May 1982 |
GBX |
8603769 |
Jul 1986 |
WOX |
8809360 |
Dec 1988 |
WOX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
572976 |
Jul 1990 |
|