Liquid crystal composition and liquid crystal display element

Compositions – Liquid crystal compositions

Reexamination Certificate

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C430S020000, C428S001100

Reexamination Certificate

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07399427

ABSTRACT:
Liquid crystal compositions are provided having a high “higher limit temperature” of a nematic phase, a low “lower limit temperature” of a nematic phase, small viscosity, suitable optical anisotropy, low threshold voltage and large specific resistance. The composition includes at least one compound selected from a group of compounds represented by formula (1) as a first component, at least one compound selected from a group of compounds represented by formula (2) as a second component, at least one compound selected from a group of compounds represented by formula (3) as a third component, and at least one compound selected from a group of compounds represented by formulae (4) and (5) as a fourth component:wherein R1is alkyl; R2is alkenyl; R3is alkyl or alkenyl; A1and A2are 1,4-phenylene, for example; Z1, Z2, and Z3are a single bond, for example; Y1and Y2are fluorine, for example.

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patent: 6174457 (2001-01-01), Kato et al.
patent: 2002/0066887 (2002-06-01), Yanai et al.
patent: 2003/0001138 (2003-01-01), Kubo et al.
patent: 2004/0089844 (2004-05-01), Saito
patent: 9059623 (1997-03-01), None
patent: 9071779 (1997-03-01), None
patent: 2003238960 (2003-08-01), None

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