Uniaxially stretched negative birefringent film and liquid crystal display having the same

Patent 5430565 Issued on July 4, 1995. Estimated Expiration Date:

June 2, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

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Inventors

Application

No. 070173 filed on 06/02/1993

US Classes:

349/120, Including at least one with negative intrinsic birefringence349/118, With refractive indices in the x, y, and z directions349/122, Particular nonoptical film or layer (e.g., adhesive layer, barrier layer)359/500, With particular material or mounting structure428/1.1LIQUID CRYSTAL OPTICAL DISPLAY HAVING LAYER OF SPECIFIED COMPOSITION

Examiners

Primary: Sikes, William L.
Assistant: Duong, Tai V.

Attorney, Agent or Firm

Burns, Doane, Swecker & Mathis

International Class

G02F 001/133.5

Foreign Application Priority Data

1992-06-02 JP

Abstract

Disclosed is a uniaxially stretched birefringent film having a negative birefringence, comprising a graft polymer which is obtained by grafting, through addition-polymerization, at least one monomer selected from styrene and derivatives thereof to a polymer having an unsaturated double bond. The liquid crystal display provided with the birefringent film is also disclosed.