Patent
1971-08-31
1977-09-27
McGraw, Vincent P.
350160R, 350267, G02F 128
Patent
active
040507866
ABSTRACT:
A display device wherein a liquid crystal is contained between accurately spaced transparent electrical contacts to allow control over the transparency or transmissive properties of the display by application of a voltage to the contacts. In one version the spacing is provided by an inorganic frit of particles which occupy the space between the electrical contacts and impart a ground glass optical property. The particles provide accurate separation that prevents the contacts from short circuiting and when immersed in a liquid crystal give the display an overall transparent or other characteristic as desired. Preferably, the contacts are applied to glass substrates which are hermetically sealed by fusion of a denser glass frit applied between peripheral edges of the substrates. In a further version, spacing is provided by a set of legs perpendicularly emanating from one of the electrical contacts and supporting it from the other electrical contact.
REFERENCES:
patent: 3505804 (1970-04-01), Hofstein
patent: 3535098 (1970-10-01), Babcock
patent: 3576761 (1971-04-01), Davis
patent: 3592526 (1971-07-01), Dreyer
patent: 3625591 (1971-12-01), Freiser et al.
patent: 3645604 (1972-02-01), Ngo
patent: 3647280 (1972-03-01), Klein et al.
patent: 3661444 (1972-05-01), Matthies
patent: 3701368 (1972-10-01), Stern
McGraw Vincent P.
Transparent Conductors, Inc.
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