Polarization film

Details Polarization film Polarization film

1989-12-06

1991-12-10

Arnold, Bruce Y.

Optical: systems and elements

Polarization without modulation

By relatively adjustable superimposed or in series polarizers

359483, G02B 530

Patent

active

050712349

ABSTRACT:
A polarization film which has excellent polarizing ability and resistance to moisture and heat is described. The polarization film includes an oriented polyvinyl-alcohol-type film having iodine adsorbed thereon, and contains a zirconium compound or a manganese compound. The zirconium compound or the manganese compound is thought to prevent dissociation of a polyiodide ion such as I.sub.3.sup.- or I.sub.5.sup.- capable of providing the polarizing ability. The polarization film of the invention may be suitable for use in a variety of liquid crystal displays, including those which are used in severe environments, such as automotive display devices, and in ordinary household devices, for example word processors.

REFERENCES:
patent: 4133775 (1979-01-01), Bloom
patent: 4388375 (1983-06-01), Hopper et al.
patent: 4643529 (1987-02-01), Hosonuma et al.
patent: 4923948 (1990-05-01), Matsuki et al.
patent: 5004327 (1991-04-01), Rosen
patent: 5007942 (1991-04-01), Claussen et al.

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