Poly(aryletherimides) for negative birefringent films for LCDs

Details Poly(aryletherimides) for negative birefringent films for LCDs Poly(aryletherimides) for negative birefringent films for LCDs

2006-07-18

2008-10-21

Hendricks, Keith D. (Department: 1794)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

With viewing layer of specified composition

C349S120000, C528S353000, C428S473500

Reexamination Certificate

active

07438957

ABSTRACT:
A class of soluble poly(aryletherimides) (PAEIs) having flexible backbones, useful in the manufacture of polymeric optical films are disclosed. The poly(aryletherimides) are dissolved in organic solvents, such as ketones and ketone solvent mixtures and coated on variety of substrates such as triacetyl cellulose (TAC), to form clear thin-layer films which display negative birefringence. The thin films can serve as compensation layers in liquid crystal displays (LCDs), and can be combined with other types of optical films, such as polarizers, brightness enhancement films, or other compensation films, to from multi-layered films that are especially useful in the manufacture of LCDs.

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