Viewing angle compensator for liquid crystal display

Details Viewing angle compensator for liquid crystal display Viewing angle compensator for liquid crystal display

1994-08-01

1995-10-10

Thomas, Alexander S.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Nonmechanical aftertreatment

428 1, 359 73, G02F 11335

Patent

active

054568676

ABSTRACT:
According to the present invention there is provided a viewing angle compensator for a liquid crystal display capable of diminishing the viewing angle dependency of the liquid crystal display.
The viewing angle compensator comprises a light transmitting substrate and a film of a specific liquid crystalline polyester, the liquid crystalline polyester taking in the state of liquid crystal a structure wherein a refractive index in the thickness direction is larger than a refractive index at least in one direction in a plane and assuming a glassy state at a temperature lower than the liquid crystal transition point of the polymer.
The viewing angle dependency of the liquid crystal display can be greatly diminished and thus the viewing angle compensator of the present invention contributes to the realization of high-grade displays and higher performance of a liquid crystal display unit.

REFERENCES:
patent: 4738811 (1988-04-01), Hara et al.
patent: 4744918 (1988-05-01), Heppke et al.
patent: 4793691 (1988-12-01), Enomoto et al.
patent: 4828758 (1989-05-01), Gillberg-LaForce et al.
patent: 5081221 (1992-01-01), Watanabe
Meredith et al., Optical and Nonlinear Optical Characterization of Molecularly Doped Thermotropic Liquid Crystalline Polymers, Macromolecules 15, (Dec. 1982).
Jerphagnon et al., Maker Fringes, A Detailed Comparison of Theory and Experiment for Isotropic and Uniaxial Crystals, Journ. of Applied Physics 41, (Dec. 1970) pp. 1667-1681.
Chemical Abstracts, vol. 98 (Dec. 1983) p. 19, Abstract No. 98:161429K, Chiral Liquid Crystal Polymers.

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