Liquid crystal display device having a phase difference plate wi

Details Liquid crystal display device having a phase difference plate wi Liquid crystal display device having a phase difference plate wi

1993-06-18

1996-04-09

Gross, Anita Pellman

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359494, G02F 11335, G02B 530

Patent

active

055067069

ABSTRACT:
A phase difference plate capable of eliminating contrast changes due to viewing angle changes of display image, coloring phenomenon of display screen, and black and white reversal phenomenon, and a liquid crystal display device capable of displaying images of high quality are presented. A phase difference plate is a drawn and elongated material possessing optical anisotropy such as high polymer compound formed in a flat plate form, and the direction of the minimum principal refractive index na of the three principal refractive indices na, nb, nc of the index ellipsoid is parallel to the y-axis direction, and the direction of the principal refractive index nb is inclined to the normal direction of the surface.

REFERENCES:
patent: 5184237 (1993-02-01), Iimura et al.

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