Vertical alignment polyimide and vertical alignment film...

Details Vertical alignment polyimide and vertical alignment film... Vertical alignment polyimide and vertical alignment film...

2006-11-07

2006-11-07

Wu, Shean C (Department: 1756)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

Alignment layer of specified composition

C428S473500, C528S310000, C528S322000, C528S353000

Reexamination Certificate

active

07132137

ABSTRACT:
A vertical alignment polyimide for LCD has the following structure:wherein R1and R2are same or different tetravalent aromatic residues or alkyl residues; n is an integer, and 24≧n≧6; a:b=1:9 to 9:1, preferably from 4:1 to 1:1; and a+b=p+q. The polyimide has an inherent viscosity of 0.04–5 dl/g.

REFERENCES:
patent: 5759442 (1998-06-01), Auman et al.
patent: 5954999 (1999-09-01), Mishina et al.
patent: 6074709 (2000-06-01), Ezzell et al.
patent: 6455208 (2002-09-01), Yamashiki et al.

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