EP0063003A2
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EP
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Liquid crystalline materials and optical displays utilizing same
Assignee: Crystaloid Electronics Co
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Filing: 1982-03-31
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Granted: —
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Expires: 2002-03-31
Abstract
Abstract Disclosed is a new family of Liquid Crystalline Materials for use in optical display devices having the general formula: The members of the family of materials are characterized by having a broad nematic operating range in conjunction with low viscosity and exhibit fast response times to a controlled electrical field in the lower temperature regions of their nematic operating range and may be mixed with other members of the family or with other liquid crystalline materials and/or homologous non-liquid crystalline mate. rials.
Inventors
- 👤 Joseph Patrick Ferrato
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 17:22
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3066; C09K19/3068; C09K19/32; C09K19/321
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
315 words
A nematic liquid crystalline material comprising at least one of the compounds having the formula where: X 1 , X 2 , X 3 , is a methane or ethane or and X 4 chlorine or cyano group; is a substituted phenyl of the formula where X 5 and Z 1 is a hydrogen or methane or ethane or chlorine or cyano group, or is a substituted biphenyl of the formula or is a disubstituted cyclohexane of the formula or is a bicyclo (2,2,2) octane ring of the formula or is an ester of the formula or where n is an integer from 1 through 12. or is an alkyl group of the formula where n is an integer from 1 through 12, or is an alkoxy group of the formula where n is an-integer from 1 through 12, or is a cyano group, wherein R 1 is a cyano group or an alkyl of the formula-C n H 2n+1 or an alkoxy of the formula C n H 2n + 1 -O- or is an ester of the formula or or a ketone of the formula where n is an integer from 1 through 12; is a phenyl of the formula or is a substituted cyclohexane of the formula or is a bicyclo (2,2,2) octane ring of the formula or is a biphenyl of the formula or is a substituted biphenyl of the formula or is a phenyl-cyclohexane derivative of the formula or is a alkyl of the formula where n is an integer from 1 through 12, where R 2 is a cyano group or an alkyl of the formula-C n R 2n + 1 or an alkoxy of the formula C n H 2n + 1 - O - or is an ester of the formula or or a ketone of the formula where n is an integer from 1 through 12.
Claim 2
Dependent Claim
315 words
A nematic liquid crystalline material comprising at least one of the compounds having the formula where: X 1 , X 2 , X 3 , is a methane or ethane or and X 4 chlorine or cyano group; is a substituted phenyl of the formula where X 5 and Z 1 is a hydrogen or methane or ethane or chlorine or cyano group, or is a substituted biphenyl of the formula or is a disubstituted cyclohexane of the formula or is a bicyclo (2,2,2) octane ring of the formula or is an ester of the formula or where n is an integer from 1 through 12. or is an alkyl group of the formula where n is an integer from 1 through 12, or is an alkoxy group of the formula where n is an-integer from 1 through 12, or is a cyano group, wherein R 1 is a cyano group or an alkyl of the formula-C n H 2n+1 or an alkoxy of the formula C n H 2n + 1 -O- or is an ester of the formula or or a ketone of the formula where n is an integer from 1 through 12; is a phenyl of the formula or is a substituted cyclohexane of the formula or is a bicyclo (2,2,2) octane ring of the formula or is a biphenyl of the formula or is a substituted biphenyl of the formula or is a phenyl-cyclohexane derivative of the formula or is a alkyl of the formula where n is an integer from 1 through 12, where R 2 is a cyano group or an alkyl of the formula-C n R 2n + 1 or an alkoxy of the formula C n H 2n + 1 - O - or is an ester of the formula or or a ketone of the formula where n is an integer from 1 through 12.
Claim 3
Dependent Claim
40 words
The liquid crystalline material of Claim 1 ' wherein the compound has the formula: where X 1 is a methane or ethane or chlorine or cyano group and x 2 , X 3 and X 4 is a hydrogen group.
Claim 4
Dependent Claim
29 words
The liquid crystalline material of Claim 1 or 2 wherein X 1 is a methane group and X 2 , X 3 and X 4 is a hydrogen group.
Claim 5
Dependent Claim
13 words
The liquid crystalline material of Claim 1 wherein the compound has the formula:
Claim 6
Dependent Claim
22 words
The liquid crystalline material of Claim 1 wherein the material is used as a host in combination with a positive dichroic dye.
Claim 7
Dependent Claim
15 words
The liquid crystalline material of Claim 5 wherein the combination provides a negative optical image.
Claim 8
Dependent Claim
25 words
The liquid crystalline material of Claim 1 wherein the material is used as a host in combination with a dye having a negative optical axis.
Claim 9
Dependent Claim
45 words
The liquid crystalline material of Claim 1 wherein the compound has a negative anistrophy provided by at least one of the X 1 , X 21 X 3 , X 4 , Z 1 and Z 2 groups of the compound being a cyano group.
Claim 10
Dependent Claim
17 words
The liquid crystalline material of Claim 8 mixed with a liquid crystalline material having positive dielectric anistrophy.
Claim 11
Dependent Claim
44 words
The liquid crystalline material of Claim 1 wherein the compound is characterized by changing from a compound having positive dielectric anistrophy to a compound having negative dielectric anistrophy in response to a change in the frequency of an electrical field imposed across the compound.
Claim 12
Dependent Claim
48 words
The liquid crystalline material of Claim 10 wherein at least one of the compounds is characterized by changing from a material having positive electrical anistrophy to a material having negative electrical anistrophy in response to a change in the frequency of an electrical field imposed across the material.
Claim 13
Dependent Claim
12 words
An optical display device utilizing the liquid crystalline material of Claim 1.
References Cited (Backward Citations)
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