Optically active materials

Details Optically active materials Optically active materials

2005-06-14

2005-06-14

Wu, Shean C. (Department: 1756)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

C252S299610, C252S299620, C252S299630, C252S299640, C252S299660, C252S299700, C252S299010, C560S056000, C560S061000, C560S085000, C560S100000, C549S464000

Reexamination Certificate

active

06905739

ABSTRACT:
A compound is of formula (I), in which: A1to A4, E1and E2each independently represent hydrogen or an optionally-substituted hydrocarbon group; B1and B2each independently represent a single bond, an oxygen atom or an optionally-substituted hydrocarbon group; MG1and MG2each independently represent an optionally-substituted ring system; CG is a divalent or polyvalent chiral group. The optically active compound may be used as a doping agent for liquid crystals for a wide range of applications including solid state cholesteric filters for projection displays, circular polarisers, optical filters, etc.

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