| 摘要 |
The invention relates to a nematic liquid crystal mixture having a positive dielectric anisotropy DELTAepsi of at least +4 and a birefringence DELTAn of at least 0.12, characterized in that the mixtures comprises one or more components having the core structurewherein L1, L2, Y and Z are each independently of one another H or F, one of Q1 and Q2 is 1,4-phenylene, 3-fluoro-1,4-phenylene or 3,5-difluoro-1,4-phenylene and the other residue Q1 or Q2 is -CH2CH2-, -CH2CH2CH2CH2- or -if at least one of L1, L2, Y and Z denotes F-also a single bond, whereby this core structure can be optionally further fluorinated in the benzene rings.
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