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EP0149754A2
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Liquid-crystal compound, liquid crystal composition and liquid crystal display device
Assignee: Hitachi Ltd
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Filing: 1984-11-23
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Granted: —
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Expires: 2004-11-23
Abstract
Abstract The present liquid crystal compounds are novel ester-type compounds showing a smectic liquid crystal phase and being capable of increasing a dielectric constant anisotropy, represented by the following general formula: wherein R is an alkyl group; X 1 and X 2 are the same or different from each other and are group -COO- and -OOC-, and when X 1 is group -COO-, Y 1 is group and Y 2 is grou f and when X I is group -OOC-, Y 1 is group and Y2 is group The present liquid composition contains the novel compound, and the present liquid crystal display device uses the liquid crystal composition for utilizing the characteristics of the novel compound. Particularly, the present liquid crystal display device is a thermally addressed display device.
Inventors
- 👤 Hisao Yokokura
- 👤 Susumu Era
- 👤 Hidetoshi Abe
- 👤 Tadao Nakata
- 👤 Teruo Kitamura
- 👤 Akio Mukoh
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 03:46
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3066; C09K19/3068; C07; C07C; C07C205/00; C07C205/39; C07C205/42; C07C205/43; C07C205/49; C07C205/57; C09K19/10; C09K19/20; C09K19/2007
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
68 words
Liquid crystal compounds represented by the following general formula I: wherein R is an alkyl group; X 1 and X 2 are the same or different from each other and are groups -COO- and -OOC-, and when X 1 is group -COO-, Y 1 is group or and Y 2 is group and when X 1 is group -OOC-, Y 1 is group and Y 2 is group
Claim 2
Dependent Claim
68 words
Liquid crystal compounds represented by the following general formula I: wherein R is an alkyl group; X 1 and X 2 are the same or different from each other and are groups -COO- and -OOC-, and when X 1 is group -COO-, Y 1 is group or and Y 2 is group and when X 1 is group -OOC-, Y 1 is group and Y 2 is group
Claim 3
Dependent Claim
79 words
A liquid crystal composition which comprises containing at least one of liquid crystal compounds represented by the following general formula I: wherein R is an alkyl group; X 1 and X 2 are the same or different from each other and are groups -COO- and -OOC, and when X 1 is group -COO-; Y 1 is group and Y 2 is group and when X 1 is group -OOC-, Y 1 is group and Y 2 is group -
Claim 4
Dependent Claim
79 words
A liquid crystal composition which comprises containing at least one of liquid crystal compounds represented by the following general formula I: wherein R is an alkyl group; X 1 and X 2 are the same or different from each other and are groups -COO- and -OOC, and when X 1 is group -COO-; Y 1 is group and Y 2 is group and when X 1 is group -OOC-, Y 1 is group and Y 2 is group -
Claim 5
Dependent Claim
21 words
A liquid crystal composition according to Claim 2, wherein at least 5% by weight of the liquid crystal compound is contained.
Claim 6
Dependent Claim
112 words
A liquid crystal display device comprising a liquid crystal layer between two counterposed electrode substrates, where the liquid crystal layer is optically modulated by applying an electric potential between the electrode substrates, a liquid crystal composition constituting the liquid crystal layer containing at least one of liquid crystal compounds represented by the following general formula I: wherein R is an alkyl group; X 1 and X 2 are the same or different from each other and are groups -COO- and -OOC-, and when X 1 is group -COO-, Y is group or and Y 2 is group and when X 1 is group -OOC-, Y 1 is group and Y2 is group
Claim 7
Dependent Claim
112 words
A liquid crystal display device comprising a liquid crystal layer between two counterposed electrode substrates, where the liquid crystal layer is optically modulated by applying an electric potential between the electrode substrates, a liquid crystal composition constituting the liquid crystal layer containing at least one of liquid crystal compounds represented by the following general formula I: wherein R is an alkyl group; X 1 and X 2 are the same or different from each other and are groups -COO- and -OOC-, and when X 1 is group -COO-, Y is group or and Y 2 is group and when X 1 is group -OOC-, Y 1 is group and Y2 is group
Claim 8
Dependent Claim
23 words
A liquid crystal display device according to Claim 4, wherein the liquid crystal display device is a thermally addressed liquid crystal display device.
References Cited (Backward Citations)
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