EP0168012A2
Expired / Lapsed
EP
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Liquid crystal composition
Assignee: Casio Computer Co Ltd
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Filing: 1985-07-08
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Granted: —
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Expires: 2005-07-08
Abstract
Abstract A liquid crystal composition includes three liquid crystal materials, each seleced from specified liquid crystal compounds. The composition has a low threshold voltage and a low viscosity.
Inventors
- 👤 Seiichi Kizaki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 17:55
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/42; C09K19/46; C09K19/44
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
163 words
A liquid crystal composition comprising: at least one first liquid crystal material selected from the group consisting of liquid crystal compounds represented by general formulas (characterized in that each R 1 is independently ethyl group, propyl group or butyl group, each R 2 is independently ethyl group, propyl group or pentyl group, and R 3 is ethyl group or propyl group); at least one second liquid crystal material selected from the group consisting of liquid crystal compounds represented by general formulas (characterized in that tach R 4 is independently propyl group or pentyl group, R 5 is ethyl group or pentyl group, and R 6 is propyl group or butyl group); and at least one third liquid crystal material selected from the group consisting of liquid crystal compounds represented by general formulas (characterized in that each R is independently propyl group or pentyl group, R 8 is ethyl group or propyl group, and R 9 is methyl group, ethyl group, or butyl group).
Claim 2
Dependent Claim
163 words
A liquid crystal composition comprising: at least one first liquid crystal material selected from the group consisting of liquid crystal compounds represented by general formulas (characterized in that each R 1 is independently ethyl group, propyl group or butyl group, each R 2 is independently ethyl group, propyl group or pentyl group, and R 3 is ethyl group or propyl group); at least one second liquid crystal material selected from the group consisting of liquid crystal compounds represented by general formulas (characterized in that tach R 4 is independently propyl group or pentyl group, R 5 is ethyl group or pentyl group, and R 6 is propyl group or butyl group); and at least one third liquid crystal material selected from the group consisting of liquid crystal compounds represented by general formulas (characterized in that each R is independently propyl group or pentyl group, R 8 is ethyl group or propyl group, and R 9 is methyl group, ethyl group, or butyl group).
Claim 3
Dependent Claim
48 words
A composition according to claim 1, characterized in that said first to third liquid crystal materials are used in amounts of 5 to 70% by weight, 15 to 40% by weight and 5 to 30% by weight, respectively, based on a total weight of said liquid crystal composition.
Claim 4
Dependent Claim
42 words
A composition according to claim 2, characterized in that said first liquid crystal material comprises at least one compound selected from the compounds represented by general formulas (I) and (II) and is used in an amount of 10 to 30% by weight.
Claim 5
Dependent Claim
34 words
A composition according to claim 2, characterized in that said first liquid crystal material comprises the compound represented by general formula (III) and is used in an amount of 5 to 30% by weight.
Claim 6
Dependent Claim
42 words
A composition according to claim 2, characterized in that said first liquid crystal material comprises at least one compound selected from the compounds represented by general formulas (IV) and (V) and is used in an amount of 5 to 40% by weight.
Claim 7
Dependent Claim
31 words
A composition according to claim 1, characterized in that said first liquid crystal material comprises at least one compound selected from the compounds represented by general formulas (I), (III) and (IV).
Claim 8
Dependent Claim
38 words
A composition according to claim 6, characterized in that said first to third liquid crystal materials are used in amounts of 40 to 55% by weight, 25 to 35% by weight, and 15 to 25% by weight, respectively.
Claim 9
Dependent Claim
22 words
A composition according to claim 1, characterized in that said composition has a threshold voltage of not more than about 1.5 V.
Claim 10
Dependent Claim
22 words
A composition according to claim 1, characterized in that said composition has a nematic-isotropic phase transition point of not lower than 55°C.
Claim 11
Dependent Claim
22 words
A composition according to claim 7, characterized in that said composition has a crystal-nematic phase transition point of not higher than 0°C.
Claim 12
Dependent Claim
22 words
A composition according to claim 8, characterized in that said composition has a viscosity of not more than 40 centipoises at 20°C.
References Cited (Backward Citations)
No citation records indexed.
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