Daniel John Dyer, 69601 E Burgess Rd APT F4, Pensacola, FL 32504

6569504, May 27, 2003

Aug 11, 2000

09/639500

David M. Walba - Boulder CO
Daniel J. Dyer - Pasadena CA
Uwe Muller - Berlin, DE
Peter Cobben - Waalre, NL
Xin Hua Chen - Boulder CO
William Thurmes - Longmont CO
Michael Wand - Boulder CO

Displaytech, Inc. - Longmont CO

C09K 1952

428 11, 25229901, 2522992, 2522996, 25229963, 25229961

This invention provides LC compositions useful as birefringent materials in electrooptic devices which exhibit zero or low negatively sloped birefringence dispersioon (e. g. , exhibiting positive birefringence dispersion significantly lower than that of currently available LC compositions) or more preferably positively sloped birefringence dispersion in which birefringence of the material increases with wavelength. The invention provides compounds useful as components of LC compositions which exhibit negative birefringence where n is higher than n. The compounds of this invention are dimers of LC-like compounds in which the monomers are linked to each other through a high birefringence moiety (dimerization linker). The LC monomers consist of an LC core and one or two tail groups. Preferred monomers for this invention have low birefringence in comparison to the birefringence of the monomer linking moiety.

6139771, Oct 31, 2000

Apr 4, 1997

8/833280

David M. Walba - Boulder CO
Daniel J. Dyer - Pasadena CA
Uwe Muller - Berlin, DE
Peter Cobben - Waalre, NL
Xin Hua Chen - Boulder CO
William Thurmes - Longmont CO
Michael Wand - Boulder CO

Displaytech, Inc. - Longmont CO

C09K 1952
C09K 1906
C07D23902
C07C 1908

25229901

This invention provides LC compositions useful as birefringent materials in electrooptic devices which exhibit zero or low negatively sloped birefringence dispersion (e. g. , exhibiting positive birefringence dispersion significantly lower than that of currently available LC compositions) or more preferably positively sloped birefringence dispersion in which birefringence of the material increases with wavelength. The invention provides compounds useful as components of LC compositions which exhibit negative birefringence where n. sub. o is higher than n. sub. e. The compounds of this invention are dimers of LC-like compounds in which the monomers are linked to each other through a high birefringence moiety (dimerization linker). The LC monomers consist of an LC core and one or two tail groups. Preferred monomers for this invention have low birefringence in comparison to the birefrigence of the monomer linking moiety.