Polyimide angularity enhancement layer

Details Polyimide angularity enhancement layer Polyimide angularity enhancement layer

1996-05-23

1998-05-12

Hampton-Hightower, P.

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

Synthetic resins

From carboxylic acid or derivative thereof

528125, 528128, 528170, 528172, 528173, 528174, 528176, 528185, 528188, 528220, 528229, 428 1, 4284935, C08G 7310, B32B 2700

Patent

active

057506418

ABSTRACT:
An angularity enhancement layer in a liquid crystal display, which display comprises a liquid crystal cell, wherein the angularity enhancement layer includes a negative birefringent polyimide layer comprising a plurality of structural units having pendant fluorene groups, said angularity enhancement layer being disposed on at least one surface of said liquid crystal cell. A liquid crystal display can comprise an angularity enhancement construction of the invention which comprises a polyimide layer.

REFERENCES:
patent: 4845185 (1989-07-01), Teramoto et al.
patent: 4897092 (1990-01-01), Burgoyne, Jr. et al.
patent: 5055616 (1991-10-01), Burgoyne, Jr. et al.
patent: 5196953 (1993-03-01), Yeh et al.
patent: 5344916 (1994-09-01), Harris et al.
patent: 5480964 (1996-01-01), Harris et al.
Langsam et al., "Effects of Diamine Monomer Structure on the Gas Permeability of Polyimide. I. Bridged Diamines," Journal of Polymer Science, Part A, vol. 31, pp. 909-921 (1993).

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