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Browse Prior Art Database

PRACTICAL METHODS TO ENABLE COLOR IN NMOS FWA READ BARS

IP.com Disclosure Number: IPCOM000026351D
Original Publication Date: 1991-Jun-30
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 74K

Publishing Venue

Xerox Disclosure Journal

Abstract

There is presently considerable interest in both highlight and full color copiers. These copiers will most likely be electronic based with a scanner, a printer, and an electronic subsystem for color correction. In order to have sufficient resolution and speed to address mid and high volume product markets, the scanner system needs to have a read bar that can meet the requirements. The proposed color Full Width Array (FWA) read bar architectures meet the requirements.

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XEROX DISCLOSURE JOURNAL

PRACTICAL METHODS TO Proposed Classification ENABLE COLOR IN NMOS FWA
READ BARS
Joseph J. Daniele

U.S. C1.358/075 Int. C1. H04n 01/46

There is presently considerable interest in both highlight and full color copiers. These copiers will most likely be electronic based with a scanner, a printer, and an electronic subsystem for color correction. In order to have sufficient resolution and speed to address mid and high volume product markets, the scanner system needs to have a read bar that can meet the requirements. The proposed color Full Width Array (FWA) read bar architectures meet the requirements.

Because of space limitations and the high resolution of the FWA chips, on chip amplifiers and control circuitry are laid out parallel to each optical element, or pixel, and replicated from pixels to pixel. Two lines of pixels are therefore possible on each chip, but the control circuitry must be placed on opposite sides of the chip in a mirror image fashion. A chip is made up of several pixels which can then be butted together in the x direction forming a full width array read bar of pixels. With this two line pixel configuration, highlight color sensing can be accomplished by placing a color filter over one of the two lines of pixels. The filter is applied during the processing of the chips at the wafer level and can be a dye in a polymer or a dielectric filter. Also, by offsetting the two rows by half a pixel, a higher spatial resolution can...