Browse Prior Art Database

ADDRESSABLE SCREEN

IP.com Disclosure Number: IPCOM000024788D
Original Publication Date: 1982-Feb-28
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 56K

Publishing Venue

Xerox Disclosure Journal

Abstract

The disclosure relates to a photocopying system which includes a screening circuit for analyzing an initially exposed image and modifying the initial exposure to vary the micro gray level density. Referring to the figure, a scanning system (not shown) has illuminated and scanned an original document and reflected light is directed toward photoreceptor drum 10 exposing the drum through slit 12 in image-wise fashion. A portion of this reflected light image is intercepted by mirror 14 and reflected to CCD array 16 via fiber optics pipe 18. The output of array 16 is analyzed by control circuit 20 and a signal corresponding to the micro gray density of the scanned document controls the operation of A 0 modular 22. A scanning beam from HeNe laser 24 then has impressed upon it the scanning information contained in the signal from circuit 20. The laser writes this information onto drum 10, line by line via galvometer 26.

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XEROX DISCLOSURE JOURNAL

ADDRESSABLE SCREEN Proposed Richard M. Bobbe Classification

U.S. C1. 355/8

Int. C1. G03g 15/28

The disclosure relates to a photocopying system which includes a screening circuit for analyzing an initially exposed image and modifying the initial exposure to vary the micro gray level density. Referring to the figure, a scanning system (not shown) has illuminated and scanned an original document and reflected light is directed toward photoreceptor drum 10 exposing the drum through slit 12 in image- wise fashion. A portion of this reflected light image is intercepted by mirror 14 and reflected to CCD array 16 via fiber optics pipe 18. The output of array 16 is analyzed by control circuit 20 and a signal corresponding to the micro gray density of the scanned document controls the operation of A0 modular 22. A scanning beam from HeNe laser 24 then has impressed upon it the scanning information contained in the signal from circuit 20. The laser writes this information onto drum 10, line by line via galvometer 26.

Control circuit 20 can also contain a time delay count which allows for physical displacement of the screen image.

Volume 7 Number 1 January/February 1982 39

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

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40

   XEROX DISCLOSURE JOURNAL Volume 7 Number 1 January/February 1982

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