Optical birefringence compensator adapted for LCD

Details Optical birefringence compensator adapted for LCD Optical birefringence compensator adapted for LCD

1991-10-11

1994-03-29

Thomas, Alexander S.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Nonmechanical aftertreatment

428 1, 359 73, G02F 11333

Patent

active

052981991

ABSTRACT:
Ionomer resin sheet is stretched in one direction in the plane of sheet to give uniaxial anisotropy, and then heated above the melting point under pressure to cause relaxation of the anisotropy. After cooling, a sheet of biaxial anisotropy is obtained. The degree of anisotropy depends on the initial stretching, heating temperature, heating time and pressure.

REFERENCES:
patent: 4385806 (1983-05-01), Fergason
patent: 4514452 (1985-04-01), Tanaka et al.
patent: 4701028 (1987-10-01), Clerc
patent: 4813770 (1989-03-01), Clerc et al.

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