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ELECTROSTATIC/ELECTRONIC METHODS AND APPARATUS FOR DIGITIZING IMAGES

IP.com Disclosure Number: IPCOM000026563D
Original Publication Date: 1992-Oct-31
Included in the Prior Art Database: 2004-Apr-06
Document File: 4 page(s) / 137K

Publishing Venue

Xerox Disclosure Journal

Abstract

A method and apparatus for converting electrostatic optical patterns to digitized electrical signals is shown in Figures 1 and 2. The structure in the Figures generates electrostatic patterns that are spatially digitized and each pixel can be read individually by calling up its unique address. Modifications of the basic structure make possible the simultaneous reading of pixels which is of great importance when the electronic conversion time is short.

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XEROX DISCLOSURE JOURNAL

ELECTROSTATIC/ELECTRONIC METHODS AND APPARATUS FOR DIGITIZING IMAGES
Lloyd F. Bean

Proposed Classification

U.S. C1.355/211

Int. C1. G03g 5/00

SWITCHING

SWITCHING

FIG. I

XEROX DISCLOSURE JOURNAL - Vo1.17 No. 5 SeptembedOctober 1992 325

[This page contains 1 picture or other non-text object]

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ELECTROSTATIWELECTRONIC METHODS AND APPARATUS

FOR DIGITIZING IMAGES(Cont'd)

FIG. 2

326 XEROX DISCLOSURE JOURNAL - Vo1.17 No. 5 SeptembedOctober 1992

[This page contains 1 picture or other non-text object]

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ELECTROSTATIC/ELECTRONIC METHODS AND APPARATUS FOR DIGITIZING IMAGES(Cont'd)

A method and apparatus for converting electrostatic optical patterns to digitized electrical signals is shown in Figures 1 and 2. The structure in the Figures generates electrostatic patterns that are spatially digitized and each pixel can be read individually by calling up its unique address. Modifications of the basic structure make possible the simultaneous reading of pixels which is of great importance when the electronic conversion time is short.

The structure of Figure 1 includes an insulating support member (A); a patterned (digitized) conductive photoconductive substrate layer (B); a photoconductive layer (0; an insulating charge storage layer (D); a patterned (digitized) transparent conductive layer which is orthogonal to the patterned conductive Photoconductive substrate (E); and electronic switching circuits at the end of each row/column of the digitizing conductive patterns for photoconductive sensitization and pixel reading. The structure is imaged by applying a potential across layers (C) and (D) and exposing the structure through the transparent electrode (E). The interfacial charge at any given pixel is read...