- NOVEL LIQUID CRYSTALLINE COMPOUND, LIQUID CRYSTAL COMPOSITION, OPTICAL ELEMENT AND OPTICAL DISPLAY DEVICE
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PROBLEM TO BE SOLVED: To provide a novel liquid crystalline compound that is low in dielectric anisotropy, has responsiveness, and changes its birefringence by application of voltage. SOLUTION: The present invention provides a compound represented by formula (1) (In the formula (1), R1, R2 and R3 independently represent a hydrogen atom or C1-C10 alkyl, in the alkyl, at least one -CH2- may be substituted by -O-, -S-, -CO-, or -SiH2-, and at least one -(CH2)2- may be substituted by -CH=CH-or -C≡C-. n is an integer of 0-4. m is an integer of 1 or 2. Z1 and Z2 are -CH=CH-). SELECTED DRAWING: None COPYRIGHT: (C)2016,JPOandINPIT
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Paragraph 0090
(2018/10/16)
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- Nematic liquid crystals with a tetrafluoroethylene bridge in the mesogenic core structure
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A dramatic increase of the clearing temperatures of liquid crystals based on bis(cyclohexyl)ethane 1 by 50 to 70 K can be achieved by the perfluorination of the central ethylene link. Conformational analysis indicates that this effect is due to the increased rigidity of the mesogenic core structure and to the suppression of conformers with a bent shape. Materials based on bis(cylohexyl)tetrafluoroethane 2 might play a crucial role as materials for the next generation of active matrix LCDs with reduced power consumption.
- Kirsch,Bremer,Huber,Lannert,Ruhl,Lieb,Wallmichrath
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p. 5414 - 5417
(2007/10/03)
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