Light valve, light valve suspension materials and suspension the

Details Light valve, light valve suspension materials and suspension the Light valve, light valve suspension materials and suspension the

1975-08-13

1977-05-24

Nelms, David C.

350150, G02B 523

Patent

active

040251632

ABSTRACT:
A light valve including suspending materials which have an ability to prevent or substantially retard agglomeration of the particles in suspension during the application of a voltage to the suspension. The materials comprise aromatic esters which are derivable from aromatic alcohols, such as phenyl acetate, cresyl acetate and structurally similar compounds. Other suspending material such as non-aqueous liquids or solids may also form part of the suspending medium of this invention, used to suspend the particles. The suspension also may include a coating material to coat the particles in suspension and act in combination with the suspending materials to prevent or substantially reduce agglomeration of the particles when a voltage is applied to the suspension.

REFERENCES:
patent: 3788729 (1974-01-01), Lowell et al.
patent: 3848964 (1974-11-01), Marks
patent: 3932025 (1976-01-01), Lakatos et al.

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