Electrostatic display device

Details Electrostatic display device Electrostatic display device

1977-09-01

1980-06-17

Sikes, William L.

350360, G02F 119

Patent

active

042081033

ABSTRACT:
An electrostatic display device has a closed opaque chamber with one or more transparent windows in a side thereof. Mounted within the chamber adjacent to each window is a resilient electrode that is capable of moving so as to block the adjacent window or to withdraw from the window in response to a signal voltage that is applied between the resilient electrode and a fixed electrode. The total window area is less than about 20% of the exterior surface area of the chamber so that an "open" window functions optically as a light sink and appears dark. The outer surface of the resilient electrode may be of a bright hue for optical contrast in a normally bright "day time" ambient. Alternatively a lamp within the chamber provides an electrically actuated display that is visible in a dark ambient.

REFERENCES:
patent: 3553364 (1971-01-01), Lee
patent: 3897997 (1975-08-01), Kalt
patent: 3989357 (1976-11-01), Kalt

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