US4882083A
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Smectic liquid crystal mixture
Assignee: JNC Corp
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Filing: 1988-05-27
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Granted: 1989-11-21
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Expires: 2008-05-27
Abstract
Abstract A smectic liquid crystal mixture having a broad smectic C phase temperature range including room temperature, a ferroelectric smectic liquid crystal mixture having a large spontaneous polarization, comprising the above smectic mixture and at least one optically active compound, and a liquid crystal display element having an improved response time, containing the above ferroelectric smectic liquid crystal mixture are provided, which smectic liquid crystal mixture comprises (1) at least two components at least one of which is a pyrimidine compound expressed by the formula <CHEM> wherein R<1> and R<2> each are a linear alkyl group having 1 -20 carbons; (2) at least one pyrimidine compound of the formula (I) and at least one pyrimidine compound expressed by the formula <CHEM> wherein R<3> and R<4> each are a linear alkyl group having 1 - 18 carbons; or (3) at least one pyrimidine compound of the formula (I) and at least one biphenylpyrimidine compound expressed by the formula <CHEM> wherein R<5> and R<6> each are a linear alkyl or alkoxy group each having 1 - 18 carbons. s
Inventors
- 👤 Kanetsugu Terashima
- 👤 Mitsuyoshi Ichihashi
- 👤 Fusayuki Takeshita
- 👤 Makoto Kikuchi
- 👤 Kenji Furukawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:04
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/34; C09K19/3441; C09K19/345; C09K19/3458
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
58 words
A smectic C liquid crystal mixture comprising at least two components at least one of which is a 5-alkoxy-2-(4-alkylphenyl)pyrimidine compound expressed by the formula wherein R 1 represents a linear alkyl group of 4 to 20 carbon atoms and R 2 represents a linear alkyl group of 7 to 20 carbon atoms, and having a smectic C phase.
Claim 2
Dependent Claim
58 words
A smectic C liquid crystal mixture comprising at least two components at least one of which is a 5-alkoxy-2-(4-alkylphenyl)pyrimidine compound expressed by the formula wherein R 1 represents a linear alkyl group of 4 to 20 carbon atoms and R 2 represents a linear alkyl group of 7 to 20 carbon atoms, and having a smectic C phase.
Claim 3
Dependent Claim
96 words
A smectic C liquid crystal mixture comprising at least one 5-alkoxy-2-(4-alkylphenyl)pyrimidine compound expressed by the formula ##STR100## wherein R 1 represents a linear alkyl group of 4 to 20 carbon atoms and R 2 represents a linear alkyl group of 7 to 20 carbon atoms, and having a smectic C phase; and at least one 5-alkyl-2-(4-alkoxyphenyl)pyrimidine compound expressed by the formula ##STR101## wherein R 3 represents a linear alkyl group of 6 to 12 carbon atoms and R 4 represents a linear alkyl group of 8 to 11 carbon atoms and having a smectic C phase.
Claim 4
Dependent Claim
96 words
A smectic C liquid crystal mixture comprising at least one 5-alkoxy-2-(4-alkylphenyl)pyrimidine compound expressed by the formula ##STR100## wherein R 1 represents a linear alkyl group of 4 to 20 carbon atoms and R 2 represents a linear alkyl group of 7 to 20 carbon atoms, and having a smectic C phase; and at least one 5-alkyl-2-(4-alkoxyphenyl)pyrimidine compound expressed by the formula ##STR101## wherein R 3 represents a linear alkyl group of 6 to 12 carbon atoms and R 4 represents a linear alkyl group of 8 to 11 carbon atoms and having a smectic C phase.
Claim 5
Dependent Claim
87 words
A smectic C liquid crystal mixture comprising at least one 5-alkoxy-2-(4-alkylphenyl)pyrimidine compound expressed by the formula ##STR102## wherein R 1 represents a linear alkyl group of 4 to 20 carbon atoms and R 2 represents a linear alkyl group of 7 to 20 carbon atoms, and having a smectic C phase; and at least one biphenylpyrimidine compound expressed by the formula ##STR103## wherein R 5 and R 6 each represent the same or different linear alkyl group or alkoxy group each of 1 to 18 carbon atoms.
Claim 6
Dependent Claim
87 words
A smectic C liquid crystal mixture comprising at least one 5-alkoxy-2-(4-alkylphenyl)pyrimidine compound expressed by the formula ##STR102## wherein R 1 represents a linear alkyl group of 4 to 20 carbon atoms and R 2 represents a linear alkyl group of 7 to 20 carbon atoms, and having a smectic C phase; and at least one biphenylpyrimidine compound expressed by the formula ##STR103## wherein R 5 and R 6 each represent the same or different linear alkyl group or alkoxy group each of 1 to 18 carbon atoms.
Claim 7
Dependent Claim
59 words
A ferroelectric smectic C liquid crystal mixture comprising at least one 5-alkoxy-2-(4-alkylphenyl)pyrimidine compound expressed by the formula ##STR104## wherein R 1 represents a linear alkyl group of 4 to 20 carbon atoms and R 2 represents a linear alkyl group of 7 to 20 carbon atoms, and having a smectic C phase; and at least one optically active compound.
Claim 8
Dependent Claim
59 words
A ferroelectric smectic C liquid crystal mixture comprising at least one 5-alkoxy-2-(4-alkylphenyl)pyrimidine compound expressed by the formula ##STR104## wherein R 1 represents a linear alkyl group of 4 to 20 carbon atoms and R 2 represents a linear alkyl group of 7 to 20 carbon atoms, and having a smectic C phase; and at least one optically active compound.
Claim 9
Dependent Claim
103 words
A ferroelectric smectic C liquid crystal mixture comprising at least one 5-alkoxy-2-(4-alkylphenyl)pyrimidine compound expressed by the formula ##STR105## wherein R 1 represents a linear alkyl group of 4 to 20 carbon atoms and R 2 represents a linear alkyl group of 7 to 20 carbon atoms, and having a smectic C phase; at least one 5-alkyl-2-(4-alkoxyphenyl)pyrimidine compound expressed by the formula ##STR106## wherein R 3 represents a linear alkyl group of 6 to 12 carbon atoms and R 4 represents a linear alkyl group of 8 to 11 carbon atoms and having a smectic C phase; and at least one optically active compound.
Claim 10
Dependent Claim
103 words
A ferroelectric smectic C liquid crystal mixture comprising at least one 5-alkoxy-2-(4-alkylphenyl)pyrimidine compound expressed by the formula ##STR105## wherein R 1 represents a linear alkyl group of 4 to 20 carbon atoms and R 2 represents a linear alkyl group of 7 to 20 carbon atoms, and having a smectic C phase; at least one 5-alkyl-2-(4-alkoxyphenyl)pyrimidine compound expressed by the formula ##STR106## wherein R 3 represents a linear alkyl group of 6 to 12 carbon atoms and R 4 represents a linear alkyl group of 8 to 11 carbon atoms and having a smectic C phase; and at least one optically active compound.
Claim 11
Dependent Claim
93 words
A ferroelectric smectic C liquid crystal mixture comprising at least one 5-alkoxy-2-(4-alkylphenyl)pyrimidine compound expressed by the formula ##STR107## wherein R 1 represents a linear alkyl group of 4 to 20 carbon atoms and R 2 represents a linear alkyl group of 7 to 20 carbon atoms, and having a smectic C phase; at least one biphenylpyrimidine compound expressed by the formula ##STR108## wherein R 5 and R 6 each represent the same or different linear alkyl group or alkoxy group each of 1 to 18 carbon atoms; at least one optically active compound.
Claim 12
Dependent Claim
93 words
A ferroelectric smectic C liquid crystal mixture comprising at least one 5-alkoxy-2-(4-alkylphenyl)pyrimidine compound expressed by the formula ##STR107## wherein R 1 represents a linear alkyl group of 4 to 20 carbon atoms and R 2 represents a linear alkyl group of 7 to 20 carbon atoms, and having a smectic C phase; at least one biphenylpyrimidine compound expressed by the formula ##STR108## wherein R 5 and R 6 each represent the same or different linear alkyl group or alkoxy group each of 1 to 18 carbon atoms; at least one optically active compound.
Claim 13
Dependent Claim
65 words
A liquid crystal display element containing a ferroelectric smectic C liquid crystal mixture comprising at least one 5-alkoxy-2-(4-alkylphenyl)pyrimidine compound expressed by the formula ##STR109## wherein R 1 represents a linear alkyl group of 4 to 20 carbon atoms and R 2 represents a linear alkyl group of 7 to 20 carbon atoms, and having a smectic C phase, and at least one optically active compound.
Claim 14
Dependent Claim
65 words
A liquid crystal display element containing a ferroelectric smectic C liquid crystal mixture comprising at least one 5-alkoxy-2-(4-alkylphenyl)pyrimidine compound expressed by the formula ##STR109## wherein R 1 represents a linear alkyl group of 4 to 20 carbon atoms and R 2 represents a linear alkyl group of 7 to 20 carbon atoms, and having a smectic C phase, and at least one optically active compound.
Claim 15
Dependent Claim
108 words
A liquid crystal display element containing a ferroelectric smectic C liquid crystal mixture comprising at least one 5-alkoxy-2-(4-alkylphenyl)pyrimidine compound expressed by the formula ##STR110## wherein R 1 represents a linear alkyl group of 4 to 20 carbon atoms and R 2 represents a linear alkyl group of 7 to 20 carbon atoms, and having a smectic C phase; at least one 5-alkyl-2-(4-alkoxyphenyl)pyrimidine expressed by the formula ##STR111## wherein R 3 represents a linear alkyl group of 6 to 12 carbon atoms and R 4 represents a linear alkyl group of 8 to 11 carbon atoms and having a smectic C phase; and at least one optically active compound.
Claim 16
Dependent Claim
108 words
A liquid crystal display element containing a ferroelectric smectic C liquid crystal mixture comprising at least one 5-alkoxy-2-(4-alkylphenyl)pyrimidine compound expressed by the formula ##STR110## wherein R 1 represents a linear alkyl group of 4 to 20 carbon atoms and R 2 represents a linear alkyl group of 7 to 20 carbon atoms, and having a smectic C phase; at least one 5-alkyl-2-(4-alkoxyphenyl)pyrimidine expressed by the formula ##STR111## wherein R 3 represents a linear alkyl group of 6 to 12 carbon atoms and R 4 represents a linear alkyl group of 8 to 11 carbon atoms and having a smectic C phase; and at least one optically active compound.
Claim 17
Dependent Claim
100 words
A liquid crystal display element containing a ferroelectric smectic C liquid crystal mixture comprising at least one 5-alkoxy-2-(4-alkylphenyl)pyrimidine compound expressed by the formula ##STR112## wherein R 1 represents a linear alkyl group of 4 to 20 carbon atoms and R 2 represents a linear alkyl group of 7 to 20 carbon atoms, and having a smectic C phase; at least one biphenylpyrimidine compound expressed by the formula ##STR113## wherein R 5 and R 6 each represent the same or different linear alkyl group or alkoxy group each of 1 to 18 carbon atoms; and at least one optically active compound.
Claim 18
Dependent Claim
100 words
A liquid crystal display element containing a ferroelectric smectic C liquid crystal mixture comprising at least one 5-alkoxy-2-(4-alkylphenyl)pyrimidine compound expressed by the formula ##STR112## wherein R 1 represents a linear alkyl group of 4 to 20 carbon atoms and R 2 represents a linear alkyl group of 7 to 20 carbon atoms, and having a smectic C phase; at least one biphenylpyrimidine compound expressed by the formula ##STR113## wherein R 5 and R 6 each represent the same or different linear alkyl group or alkoxy group each of 1 to 18 carbon atoms; and at least one optically active compound.
Claim 19
Dependent Claim
22 words
A smectic C liquid crystal mixture according to claim 3 wherein R 5 and R 6 contain 5 to 10 carbon atoms.
Claim 20
Dependent Claim
22 words
A smectic C liquid crystal mixture according to claim 3 wherein said at least one biphenylpyrimidine compound has a smectic C phase.
Claim 21
Dependent Claim
23 words
A ferroelectric smectic C liquid crystal mixture according to claim 6 wherein R 5 and R 6 contain 5 to 10 carbon atoms.
Claim 22
Dependent Claim
23 words
A ferroelectric smectic C liquid crystal mixture according to claim 6 wherein said at least one biphenylpyrimidine compound has a smectic C phase.
Claim 23
Dependent Claim
21 words
A liquid crystal display element according to claim 9 wherein R 5 and R 6 contain 5 to 10 carbon atoms.
Claim 24
Dependent Claim
21 words
A liquid crystal display element according to claim 9 wherein said at least one biphenylpyrimidine compound has a smectic C phase.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-20 | 1993-05-22 | 1993-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-20 | 1997-05-22 | 1997-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-20 | 2001-05-22 | 2001-11-21 | $7700.00 | Window Closed / Lapsed |