Stock material or miscellaneous articles – Liquid crystal optical display having layer of specified... – With charge transferring layer of specified composition
Patent
1994-10-19
1996-11-05
Seidleck, James J.
Stock material or miscellaneous articles
Liquid crystal optical display having layer of specified...
With charge transferring layer of specified composition
427371, 4273722, 427384, 359 36, 359 55, 359 74, 359 75, 359 76, 359 77, 359 82, C09K 1900, B05D 312
Patent
active
055715796
ABSTRACT:
An alignment film for liquid crystal is provided which comprises a polyimide comprising a repeating unit of the general formula (I): ##STR1## wherein n is an integer of from 2 to 16 and R.sup.1 represents a divalent organic group. This polyimide is obtained for example, from a reaction between ethylene glycol bis(trimellitate dianhydride) and 4,4'-diaminodiphenyl ether. This polyimide or a varnish of a precursor thereof is coated on a plate, and dried to obtain an alignment film for liquid crystal, which stably exhibits a high pretilt angle, irrespective of curing temperatures. The present invention further provides a liquid crystal-sandwiched panel and a liquid crystal display module prepared using the alignment film as well as a material for the preparation of the alignment film.
REFERENCES:
patent: 4735492 (1988-04-01), Sekine et al.
patent: 5115089 (1992-05-01), Yoshida et al.
The Chemical Society of Japan; Preprint for the 13th Liquid Crystal Forum issued in Oct. 1987 (Abstract); pp. 14-15; "Rubbing Alignment Technique for High Pretilt Angle in a Liquid Crystal Cell".
Hashimoto Hideyuki
Kato Toshihiko
Kawakami Masahiro
Miyadera Nobuo
Miyadera Yasuo
Hampton-Hightower P.
Hitachi Chemical Company, Ltd
Seidleck James J.
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