Electro-optical display device using a liquid crystal cell

Details Electro-optical display device using a liquid crystal cell Electro-optical display device using a liquid crystal cell

1976-04-30

1978-05-09

Trafton, David L.

Communications: electrical

Systems

With specific power supply

340378R, 340380, 350332, 350356, G02F 113, G09F 932

Patent

active

040889920

ABSTRACT:
An electro-optical display device and a method of manufacturing it are disclosed. The display device includes a liquid crystal cell arranged between two polarizers. A light source is positioned adjacent one polarizer on the side thereof remote from the liquid crystal cell, and an electronic control device is coupled to the liquid crystal cell. A diaphragm is arranged on one side of the liquid crystal cell in the form of an aperture for limiting the display field of the liquid crystal. The device limits viewing parallax and improves contrast for both day and night viewing.

REFERENCES:
patent: 3744878 (1973-07-01), Kiemle et al.
patent: 3838908 (1974-10-01), Channin
patent: 3864905 (1975-02-01), Richardson
patent: 3879723 (1975-04-01), Hornung
patent: 3882490 (1975-05-01), Tashiro et al.

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