Underwater liquid crystal display apparatus having identical pol

Optical: systems and elements – Holographic system or element – Using a hologram as an optical element

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359 63, 359 70, 359 89, G02F 113

Patent

active

052990435

ABSTRACT:
A display apparatus for underwater use comprises a hermetically sealed enclosed including a liquid crystal display device. The device comprises a liquid crystal cell disposed between layers of light polarizers and a light reflector. The combination of cell, polarizers and reflector displays either bright images on a dark background or the reverse. To make the edges of the cell substantially invisible, for improving readability of the display, the liquid crystal cell is surround by a matting comprising the identical layers of light polarizers and reflector used in combination with the liquid crystal cell. A common matting can be used with a mosaic of cells to create the appearance of a single, large area cell, or with several cells to display independent images.

REFERENCES:
patent: 4202607 (1980-05-01), Washizuka et al.
patent: 4403830 (1983-09-01), Gerstner
patent: 4408836 (1983-10-01), Kikuno
patent: 4412214 (1983-10-01), Tanaka et al.
patent: 4824212 (1989-04-01), Taniguchi

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