Liquid crystal display device with positive and negative compens

Details Liquid crystal display device with positive and negative compens Liquid crystal display device with positive and negative compens

1991-09-30

1994-03-01

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

G02F 11335

Patent

active

052913236

ABSTRACT:
In a liquid crystal display device using uniaxially drawn polymer film as a phase difference plate, as the elevation angle becomes wider, the difference between the retardation of the phase difference plate and the retardation of the liquid crystal display panel becomes larger, and the optical compensation relation is broken, and the viewing angle becomes narrower. To solve this problem, uniaxially drawn polymer films are prepared separately from polycarbonate and polystyrene which differ in the optical properties, and they are disposed as the optical compensation plate at the front side and back side of a liquid crystal cell, or they are laminated and disposed at the front side and back side of a liquid crystal cell.

REFERENCES:
Patent Abstracts of Japan, vol. 14, No. 415 (Sep. 7, 1990), abstract of JP2-160204 (Jun. 20, 1990).
Fumio Ide and Hiroshi Terada, "Optical fiber and Optical Material", Kyouritsu Shuppan Press, 1989. (Japanese article and English translation).

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