Miniature display device

Details Miniature display device Miniature display device

1981-03-10

1983-05-10

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

34081527, G08B 536

Patent

active

043832555

ABSTRACT:
Each segment of a display device, e.g., a seven-segment display comprises at least one shutter normally obturating a cavity in a carrier on a base plate. Each shutter is suspended by two resilient attachments and can turn about a torsion axis established by these attachments under the influence of an electric field applied between a common electrode on a transparent cover plate and an electrode, individual to the shutter at the bottom of its cavity. An optical contrast is provided by light reflection or absorbance caused by a shutter remaining in a rest obturating position or rotating to an open position to allow light absorption in an absorbing layer backing the base plate which is transparent. A selective light transmission (light valve) construction is equally possible. The shutters themselves may be used as one electrode of each pair, with the torsion axis along a shutter edge. The shutters may be immersed in a liquid dielectric so that a smaller opening angle is required and the attachments can be shaped to provide the required degree of resilience.

REFERENCES:
patent: 3161726 (1964-12-01), Todt
patent: 3444551 (1969-05-01), Winrow
patent: 3924226 (1975-12-01), Lacy et al.
patent: 4234245 (1980-11-01), Toda et al.

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