Polymer packaging material for liquid crystal cell

Details Polymer packaging material for liquid crystal cell Polymer packaging material for liquid crystal cell

1983-11-01

1984-06-26

McCamish, Marion

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

With charge transferring layer of specified composition

C09K 334

Patent

active

044566387

ABSTRACT:
A twisted nematic liquid crystal material is sandwiched between two electrode carrying polymer film or sheet substrates in a liquid crystal display assembly. The substrate material preferably is a semi-crystalline aromatic heterochain polymer characterized by a glass transition point (T.sub.g) of at least 90.degree. C. and devoid of secondary transitions in the -50.degree. C. to +80.degree. C. range. The crystallinity of the polymer material is controlled so that the crystallite size in the polymer material is substantially smaller than the wave length of visible light (350-750 micrometers). In a preferred embodiment, an optically isotropic top substrate is formed by a sheet of amorphous cast thermosetting acrylic resin and the lower substrate is formed by a flexible sheet of semi-crystalline aromatic heterochain polymer.

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