Browse Prior Art Database

Screen Copier for a Color Display

IP.com Disclosure Number: IPCOM000043308D
Original Publication Date: 1984-Aug-01
Included in the Prior Art Database: 2005-Feb-04

Publishing Venue

IBM

Related People

Authors:
Heybruck, WF Pendy, WJ [+details]

Abstract

When using a thermal printer, the ability to copy a color display and retain the functions of distinguishing colors on paper is accomplished by printing dots of one color or a particular gray tone, depending on the type of paper used. With a special interface to the color display video signals, one can print the dots of each different color at a respectively different temperature, thereby creating gray tones or color depending on the type of thermal paper used. To vary the temperature of the dots affecting a color change on the paper, the time the dot is on or the voltage applied across the element may be changed. When time is used, the printing rate becomes color dependent, but by varying the voltage across the dot element, the printing rate can be held constant at its fastest possible rate.