Method and apparatus for improving contrast in electrophoretic d

Details Method and apparatus for improving contrast in electrophoretic d Method and apparatus for improving contrast in electrophoretic d

1976-09-10

1977-10-11

Church, Craig E.

Radiant energy

Source with charged plate-type detector

G03B 4116

Patent

active

040537684

ABSTRACT:
Apparatus and method for improving contrast in the visual image formed by toner deposited on an electrostatic image such as is formed in electronradiography. Electrophoretic toner particles and a dye are dispersed in a liquid, with the particles being deposited onto a substrate which carries the electrostatic image, with the selectively attracted particles forming the visual image. The visual image is viewed by reflected or scattered light with the light having a color emission spectrum substantially corresponding to the absorption spectrum of the dye for absorbing and thereby eliminating unwanted light.

REFERENCES:
patent: 3939345 (1976-02-01), Allan
patent: 3965352 (1976-06-01), Allan

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