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PHOTOELECTROPHORETIC IMAGING METHOD

IP.com Disclosure Number: IPCOM000022759D
Original Publication Date: 1976-Jan-31
Included in the Prior Art Database: 2004-Mar-26
Document File: 2 page(s) / 333K

Publishing Venue

Xerox Disclosure Journal

Abstract

A method for enhancing the degree of color separation and the mir~.imumdensity in polychromatic photoelectrophoretic imaging and for enhancing the minimum density character- istics for monochromatic images made by photoelectrophoretic imaging

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XEROX DISCLOSURE JOURNAL

PHOTOELECTROPHORETIC Proposed Classification
IMAGING METHOD U.S. Cl, 96/1p~
C,K. Keller mt. Cl. G03g

A method for enhancing the degree of color separation and
the mir~.imumdensity in polychromatic photoelectrophoretic
imaging and for enhancing the minimum density character-
istics for monochromatic images made by photoelectrophoretic
imaging

An image 30 is formed on the surface of an injecting elec-
trode comprising a substantially transparent substrate 10
and substantially transparent conductive layer 12, Image
30 is formed by a photoelectrophoretic imaging method in-
cluding the steps of subjecting a layer of an imaging sus-
pension comprising electrically photosensitive pigment
particles in an electrically insulating carrier liquid to an
applied electrical field established between the injecting
electrode and another electrode and exposing the suspension
to an imagewise pattern of activating electromagnetic
radiation.

The image 30 residing on the injecting electrode is sub-
jected to an image enhancing electrical field, under
darkened conditions, established between the injecting
electrode and a blocking electrode 16 which comprises a
conductive central core 18 covered with a layer of a
suitable electrically insulating material 20. Electrode 16,
which is connected to one side of potential source 22
through switch 24, is advanced across the surface of the
injecting electrode with switch 24 closed. During the image
enhancing step a transfer of pigment particles...