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US4776975A
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Nematic liquid crystal composition
Assignee: JNC Corp
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Filing: 1987-01-16
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Granted: 1988-10-11
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Expires: 2007-01-16
Abstract
Abstract A nematic liquid crystal composition capable of improving reduction in the threshold voltage of TN type liquid crystal display elements and the temperature dependency thereof, and a liquid crystal display element using the composition are provided, which composition comprising 10 to 80% by weight of a first component comprising at least one compound expressed by the formula ##STR1## wherein m represents 0 or 1, R 1 represents F or H and R 2 represents an alkyl group of 1 to 8 carbon atoms, and 10 to 40% by weight of a second component comprising at least one compound expressed by the formula ##STR2## wherein l represents 1 or 2 and R 2 is as defined above.
Inventors
- 👤 Shinichi Sawada
- 👤 Hideo Saito
- 👤 Kenji Furukawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:38
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/42
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
83 words
A nematic liquid crystal composition comprising 10 to 80% by weight of a first component comprising at least one compound expressed by the formula ##STR26## wherein m represents 0 or 1, R 1 represents F or H and R 2 represents an alkyl group of 1 to 8 carbon atoms, and 10 to 40% by weight of a second component comprising at least one compound expressed by the formula ##STR27## wherein l represents 1 or 2 and R 2 is as defined above.
Claim 2
Dependent Claim
83 words
A nematic liquid crystal composition comprising 10 to 80% by weight of a first component comprising at least one compound expressed by the formula ##STR26## wherein m represents 0 or 1, R 1 represents F or H and R 2 represents an alkyl group of 1 to 8 carbon atoms, and 10 to 40% by weight of a second component comprising at least one compound expressed by the formula ##STR27## wherein l represents 1 or 2 and R 2 is as defined above.
Claim 3
Dependent Claim
63 words
A nematic liquid crystal composition according to claim 1 wherein said first component expressed by the formula (I) comprises 0 to 40% by weight of a compound expressed by the formula (II) ##STR28## and 10 to 40% by weight of a compound expressed by the formula (III) ##STR29## said R 2 in the formulas (II) and (III) being as defined in claim 1.
Claim 4
Dependent Claim
12 words
A nematic liquid crystal composition according to claim 2, consisting of ##STR30##
Claim 5
Dependent Claim
170 words
A nematic liquid crystal composition comprising: a first component comprising 0 to 40% by weight of at least one compound expressed by the formula (II) and 10 to 40% by weight of at least one compound expressed by the formula (III), and 10 to 40% by weight of a second component comprising at least one compound expressed by the formula (IV), each mentioned below, and further as third et seq components, 0 to 32% by weight of at least one compound expressed by the formula (V), 0 to 20% by weight of at least one compound expressed by the formula (VI), 0 to 18% by weight of at least one compound expressed by the formula (VII), 0 to 40% by weight of at least one compound expressed by the formula (VIII), and 0 to 40% by weight of at least one compound expressed by the formula (IX), each mentioned below, ##STR31## wherein R 2 represents an alkyl group of 1 to 8 carbon atoms and 1 represents 1 or 2.
Claim 6
Dependent Claim
170 words
A nematic liquid crystal composition comprising: a first component comprising 0 to 40% by weight of at least one compound expressed by the formula (II) and 10 to 40% by weight of at least one compound expressed by the formula (III), and 10 to 40% by weight of a second component comprising at least one compound expressed by the formula (IV), each mentioned below, and further as third et seq components, 0 to 32% by weight of at least one compound expressed by the formula (V), 0 to 20% by weight of at least one compound expressed by the formula (VI), 0 to 18% by weight of at least one compound expressed by the formula (VII), 0 to 40% by weight of at least one compound expressed by the formula (VIII), and 0 to 40% by weight of at least one compound expressed by the formula (IX), each mentioned below, ##STR31## wherein R 2 represents an alkyl group of 1 to 8 carbon atoms and 1 represents 1 or 2.
Claim 7
Dependent Claim
12 words
A nematic liquid crystal composition according to claim 4 consisting of ##STR32##
Claim 8
Dependent Claim
11 words
A nematic liquid composition according to claim 4 consisting of ##STR33##
Claim 9
Dependent Claim
12 words
A nematic liquid crystal composition according to claim 4 consisting of ##STR34##
Claim 10
Dependent Claim
12 words
A nematic liquid crystal composition according to claim 4 consisting of ##STR35##
Claim 11
Dependent Claim
12 words
A nematic liquid crystal composition according to claim 4 consisting of ##STR36##
Claim 12
Dependent Claim
8 words
A nematic liquid crystal composition consisting of ##STR37##
Claim 13
Dependent Claim
8 words
A nematic liquid crystal composition consisting of ##STR37##
Claim 14
Dependent Claim
12 words
A nematic liquid crystal composition according to claim 4 consisting of ##STR38##
Claim 15
Dependent Claim
94 words
A liquid crystal display element using a nematic liquid crystal composition comprising a liquid crystal cell containing 10 to 80% by weight of a first component comprising at least one compound expressed by the formula ##STR39## wherein m represents 0 or 1, R 1 represents F or H and R 2 represents an alkyl group of 1 to 8 carbon atoms, and 10 to 40% by weight of a second component comprising at least one compound expressed by the formula ##STR40## wherein l represents 1 or 2 and R 2 is as defined above.
Claim 16
Dependent Claim
94 words
A liquid crystal display element using a nematic liquid crystal composition comprising a liquid crystal cell containing 10 to 80% by weight of a first component comprising at least one compound expressed by the formula ##STR39## wherein m represents 0 or 1, R 1 represents F or H and R 2 represents an alkyl group of 1 to 8 carbon atoms, and 10 to 40% by weight of a second component comprising at least one compound expressed by the formula ##STR40## wherein l represents 1 or 2 and R 2 is as defined above.
Claim 17
Dependent Claim
35 words
A nematic liquid crystal composition according to claim 1 wherein said first and second components are present in a total amount of at least 50%, by weight, based on the total weight of said composition.
Claim 18
Dependent Claim
25 words
A nematic liquid crystal composition according to claim 1 wherein in formula (I), R 2 represents an alkyl group having 2 to 5 carbon atoms.
Claim 19
Dependent Claim
25 words
A nematic liquid crystal composition according to claim 1 wherein R 2 of formula (IV) represents an alkyl group of 2 or 3 carbon atoms.
Claim 20
Dependent Claim
28 words
A nematic liquid crystal composition according to claim 2 wherein R 2 in formulae (II) and (III) independently represents an alkyl group of 2 to 5 carbon atoms.
Claim 21
Dependent Claim
62 words
A nematic liquid crystal composition according to claim 4 wherein R 2 in formulae (II), (III), and (V) and (VIII) independently represents an alkyl group of 2 to 5 carbon atoms, R 2 in formula (IV) represents an alkyl group of 2 or 3 carbon atoms, and R 2 in formula (IX) represents an alkyl group of 1 to 5 carbon atoms.
Claim 22
Dependent Claim
25 words
A liquid crystal display element according to claim 12 wherein in formula (I), R 2 represents an alkyl group having 2 to 5 carbon atoms.
Claim 23
Dependent Claim
25 words
A liquid crystal display element according to claim 12 wherein R 2 of formula (IV) represents an alkyl group of 2 or 3 carbon atoms.
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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) | 1991-10-11 | 1992-04-11 | 1992-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-11 | 1996-04-11 | 1996-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-11 | 2000-04-11 | 2000-10-11 | $7700.00 | Window Closed / Lapsed |