Liquid display device for regulating the light passing through

Details Liquid display device for regulating the light passing through Liquid display device for regulating the light passing through

1992-08-26

1993-07-27

Arnold, Bruce Y.

Optical: systems and elements

Light control by opaque element or medium movable in or...

Fluid

359886, G02B 2602

Patent

active

052315304

ABSTRACT:
A liquid display device includes a transparent display board assembly having a flat, water-tight compartment on the inside, and a piston pump assembly controlled by a reversible motor to reciprocate two or more kinds of liquids of different colors and different specific gravities in changing the transparency of the transparent display board assembly so as to regulate the light passing through.

REFERENCES:
patent: 2433456 (1947-12-01), Jansen
patent: 4044519 (1977-08-01), Morin et al.
patent: 4178077 (1979-12-01), Te Velde
patent: 4370837 (1983-02-01), Larguia
patent: 4636785 (1987-01-01), LePesant

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