Alignment film, method of forming the alignment film, liquid...

Stock material or miscellaneous articles – Liquid crystal optical display having layer of specified... – Alignment layer of specified composition

Reexamination Certificate

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C349S126000

Reexamination Certificate

active

07638175

ABSTRACT:
An alignment film for controlling orientation of liquid crystal molecules is formed of an organic silicon material which includes in its molecule an affinity imparting group for enhancing affinity to the liquid crystal molecules and an orientation characteristic imparting group for controlling orientation of the liquid crystal molecules. The affinity imparting group is at least one selected from the group comprising a vinyl group, an alkylene group, and a cyanoalkyl group, and the orientation characteristic group is at least one selected from the group comprising a phenyl group, a substituted phenyl group, a phenyl-alkyl group, a substituted phenyl-alkyl group, a branched alkyl group having carbon atoms of 3 to 12. Preferably, the organic silicon material includes organopolysilsesquioxane having a cage structure or a partially cleaved cage structure. A liquid crystal panel having the alignment film, and electronic equipment provided with the liquid crystal panel are also provided.

REFERENCES:
patent: 3947184 (1976-03-01), Saeva et al.
patent: 5766673 (1998-06-01), Nogami et al.
patent: 5814711 (1998-09-01), Choe et al.
patent: 2004/0249103 (2004-12-01), Morimoto et al.
patent: 58-111922 (1983-07-01), None
patent: 10-161133 (1998-06-01), None
patent: 2004-341165 (2004-12-01), None
patent: 2005-4177 (2005-06-01), None
JPO Website Machine English Translation of JP 2004-341165, Hirai et al., Dec. 12, 2004.
Communication from European Patent Office re: related application.

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