Liquid crystal display device with compensators

Details Liquid crystal display device with compensators Liquid crystal display device with compensators

1993-01-28

1996-02-20

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359102, G02F 11335

Patent

active

054934311

ABSTRACT:
A liquid crystal display device of stable color tone uses phase difference plates made of a uniaxially stretched polymer film and comprises a polarizer plate, a first phase difference plate, a second phase difference plate, a supertwisted nematic type liquid crystal display panel, and a polarizer plate which are stacked on each other in this order. The rate of retardation change with the change in viewing angle of the uniaxially stretched polymer film is denoted coefficient K defined by three-dimensional refractive indexes, coefficient K1 of one of the phase difference plates is set in a range of -1.ltoreq.K1.ltoreq.0.17 and coefficient K2 of the other phase difference plate is set in a range of 0.ltoreq.K2.ltoreq.1.

REFERENCES:
patent: 4909606 (1990-03-01), Wada et al.
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patent: 5142393 (1992-08-01), Okumura et al.
patent: 5175638 (1992-12-01), Kanemoto et al.
patent: 5194975 (1993-03-01), Akatsuka et al.
patent: 5213852 (1993-05-01), Arakawa et al.
patent: 5245456 (1993-09-01), Yoshimi et al.

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