Liquid crystal aligning films and liquid crystal display devices

Details Liquid crystal aligning films and liquid crystal display devices Liquid crystal aligning films and liquid crystal display devices

1993-06-07

1995-07-11

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528 26, 528 28, 528125, 528128, 528170, 528172, 528173, 528174, 528185, 528188, 528220, 528229, 528350, 428 1, 4284735, 359 75, C08G 7310

Patent

active

054322561

ABSTRACT:
The present invention provides a liquid crystal aligning film having a reduced after image and a good liquid crystal aligning property caused by a rubbing treatment of a thin film consisting of organics, and its liquid crystal display device. Specifically, they are liquid crystal aligning films containing a polymer having the skeleton represented by the general formula (1): ##STR1## in its principal chain as a main component; a liquid crystal aligning film containing a polyimide having a structural unit represented by the general formula (2): ##STR2## as the main component wherein X and Y each represent the same or atoms or groups including hydrogen atoms, an alkyl group having from 1 to 3 carbon atoms, a fluorine atom, a chlorine atom or a trifluoromethyl group, wherein their substituent positions may be at the ortho-position or the meta-position, and R shows a tetravalent aromatic or aliphatic group or a composite group having both tetravalent aromatic and aliphatic properties; and a liquid crystal display device prepared by using them.

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