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DECREASED THICKNESS WRITING ON ELECTROPHORETIC DISPLAYS

IP.com Disclosure Number: IPCOM000024176D
Original Publication Date: 1979-Dec-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 69K

Publishing Venue

Xerox Disclosure Journal

Abstract

Improved writing on an electrophoretic sandwich cell display device 1 with a single stylus or plural styli 2 is disclosed. The device includes an electrophoretic suspension material 3 confined between a substrate 4 having a conductive electrode on its interior surface, which may be overcoated with a dielectric layer, and a dielectric top layer. Visible information may be written thereon through an electrically activated stylus or an array of styli which are passed over and in contact with the top layer. Electrophoretic cells provide superior writing surf aces as they have excellent appearance, long memory times and require low activation charges for causing colored charged particles to migrate through the cell.

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CEROX DISCLOSURE JOURNAL

DECREASED THICKNESS WRITING ON ELECTROPHORETIC DISPLAYS U.S. Cl. 204/299
James H. Becker

Proposed Classification

Int. C1. Bold 13/02

FIG. I

-

I

3

FIG. 2

Improved writing on an electrophoretic sandwich cell display device 1 with a single stylus or plural styli 2 is disclosed. The device includes an electrophoretic suspension material 3 confined between a substrate 4 having a conductive electrode on its interior surface, which may be overcoated with a dielectric layer, and a dielectric top layer. Visible information may be written thereon through an electrically activated stylus or an array of styli which are passed over and in contact with the top layer. Electrophoretic cells provide superior writing surf aces as they have excellent appearance, long memory times and require low activation charges for causing colored charged particles to migrate through the cell.

Volume 4 Number 6 November/December 1979 723

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DECREASED THICKNESS WRITING ON ELECTROPHORETIC DISPLAYS (Cont'd)

An improved lower power stylus writing arrangement is provided herein by utilizing a writing surface in the form of a top layer which is locally deformed by each electrical stylus. By reducing the electrophoretic layer thickness during this process, the addressing voltages will be lowered in these areas. Once the stylus has passed a local area, the cell relaxes (i.e., returns to its normal undeformed thickn...