144261-13-2Relevant articles and documents
Compound, a liquid crystal display element and a liquid crystal composition
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Paragraph 0063; 0064; 0066, (2017/08/04)
PROBLEM TO BE SOLVED: To provide a compound having a lower viscosity than a conventional linear-cyclic compound and having excellent compatibility with a liquid crystal composition, and to provide a liquid crystal composition and a liquid crystal display
Highly birefringent nematic liquid crystals for reflective STN applications
Goulding, Mark,Reiffenrath, Volker,Hirschmann, Harald
, p. 899 - 910 (2007/10/03)
An important parameter of any LCD containing portable electronic device is a low power requirement. The reflective STN display mode offers a moderate to high information content display with low power consumption. One method to realise colour in this mode is to use a large retardation (dΔn) value in the cell. For a cell gap of 6 μm, and a retardation of ～1.5, a birefringence (Δn) of greater than +0.2 is necessary. To achieve such a value in an STN LC mixture, materials with broad nematic range, good solubility and a Δn value of +0.25 are required. A study of the trans-cyclohexyldifluorophenyltolane core structure was made and a large number of dialkyl, alkenyl-alkyl and alkoxy materials were synthesised and characterised. These materials possess low to moderate melting points, broad purely nematic mesophases, a high An and very good solubility in nematic LC hosts. They are suitable materials for inclusion in mixtures for colour reflective STN displays.
