Chroman compounds

Details Chroman compounds Chroman compounds

2011-06-07

2011-06-07

Wu, Shean C (Department: 1722)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

C252S299610, C252S299620, C549S362000, C549S365000, C549S370000, C549S398000, C549S415000

Reexamination Certificate

active

07955664

ABSTRACT:
The chroman compounds of the formula I according to the inventionin-line-formulae description="In-line Formulae" end="lead"?R1-(A1-Z1)a—W1—(Z2-A2)b-Z3—W2—(Z4-A3)c-R2in-line-formulae description="In-line Formulae" end="tail"?in which R1, A1, A2, A3, W1, W2, Z1, Z2, Z3, Z4, a, b and c have the meanings indicated in claim1, have two moieties W1and W2derived from chroman. The compounds are suitable as components of anisotropic switching media, as used, for example, in liquid-crystal display devices.

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