Nematic liquid crystal composition

Details Nematic liquid crystal composition Nematic liquid crystal composition

2007-05-22

2007-05-22

Wu, Shean C (Department: 1756)

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

C252S299660, C252S299670

Reexamination Certificate

active

11433320

ABSTRACT:
A nematic liquid crystal composition includes a compound of formula (1) and a host mixture:wherein ‘R’ is chosen from CnH2n+1O, CnH2n+1, CnH2n+1S or CnH2n−1; ‘n’ is an integer of 1 to 15; ‘A’ is‘a’ is 0 or 1; ‘B’ is —CH2CH2—, —C═C—, —C≡C— orb’ is 0 or 1; ‘D’ is—CH2CH2—, —C═C— or —C≡C—; ‘d’ is 0 or 1; ‘X’ is H, F, Cl, Br, NCS or CN; and ‘Y’ is from NCS, SCN or F. A liquid crystal display apparatus employing the nematic liquid crystal composition has a high response speed and a high phase transition temperature. In addition, the nematic liquid crystal composition has an augmented birefringence and a dielectric anisotropy. The liquid crystal display apparatus using the nematic liquid crystal composition may have an enhanced brightness.

REFERENCES:
patent: 7045176 (2006-05-01), Yun et al.
patent: 7063805 (2006-06-01), Ban
patent: 2004/0119051 (2004-06-01), Yun et al.
English translation by computer for JP 2002-012871,□□http://www4.ipdl.ncipi.go.jp/Tokujitu/PAJdetail.ipdl?N0000=60&N0120=01&N2001=2&N3001=2002-012871.

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