Optical compensatory sheet

Details Optical compensatory sheet Optical compensatory sheet

1996-02-08

1998-05-05

Ahmad, Nasser

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

With charge transferring layer of specified composition

359 73, 359 76, 428522, C09K 1900

Patent

active

057471215

ABSTRACT:
An optical compensatory sheet is composed of a transparent support, an orientation layer and an optically anisotropic layer. The orientation layer is made of a polymer, and the optically anisotropic layer is made of a liquid crystalline compound. The polymer of the orientation layer is chemically bonded to the liquid crystalline compound of the optically anisotropic layer via the interface of these layers. An element composed of a transparent support and a polymer layer of a polyvinyl alcohol at least one hydroxyl group of which is substituted with a group having a vinyl moiety, an oxiranyl moiety or an aziridinyl moiety, is useful for the preparation of the optical compensatory sheet.

REFERENCES:
patent: 4820026 (1989-04-01), Okada et al.
patent: 5583679 (1996-12-01), Ito
patent: 5631051 (1997-05-01), Ito

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