Display method, device for realizing same and displaying medium

Details Display method, device for realizing same and displaying medium Display method, device for realizing same and displaying medium

1990-07-11

1992-04-14

Brier, Jeffery A.

Communications: electrical

Land vehicle alarms or indicators

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

340765, 359 51, 359 52, G09G 336

Patent

active

051051850

ABSTRACT:
The present invention relates to a method and a device for displaying letters, images, etc. as well as a displaying medium used therefor, by which a display medium obtained by superposing a photoconductive layer, in which microcapsules are dispersed on a substrate. The microcapsules enclose a liquid crystal material which transitions between a transparent state and an opaque state by the application of an electric field. The substrate has a conductive surface so that charging of the surface causes the microcapsules to become transparent. An electrostatic latent image is formed on the surface of the displaying medium by irradiating selectively the surface with light. An AC electric field is applied to the displaying medium in order to make the microcapsules opaque at the position corresponding to the place, where the electric field is made disappear thereby making the latent image visible.

REFERENCES:
patent: 3732119 (1973-05-01), Churchill et al.
patent: 3764211 (1973-10-01), Morse et al.
patent: 3795517 (1974-03-01), Sutton
patent: 4603945 (1986-08-01), Fergason
patent: 4971719 (1990-11-01), Vaz et al.
patent: 4981340 (1991-01-01), Kurematsu et al.
Xerox Disclosure Journal, Liquid Crystal Display with Power Amplification by Benjamin Kazan, 11/4/80.

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