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Energy Management for an Electronic Font Used in a Resistive Ribbon Printer

IP.com Disclosure Number: IPCOM000040243D
Original Publication Date: 1987-Oct-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Bohnhoff, AE: AUTHOR [+3]

Abstract

An electronic font used in a resistive ribbon printer has the magnitude of its print current determined by the percentage of print elements (pels) that have to be activated to print the character, with alternate characters being used under certain constraints when over 50% of the pels would have to be turned on. This energy mamagement prevents damage to the printer. Four-bit binary codes are employed for determining the print current to be utilized for printing each character of an electronic font used in a resistive ribbon printer. No change of the normal print current is made for codes representing when 10-32% of the pels are turned on to print a character.

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Energy Management for an Electronic Font Used in a Resistive Ribbon Printer

An electronic font used in a resistive ribbon printer has the magnitude of its print current determined by the percentage of print elements (pels) that have to be activated to print the character, with alternate characters being used under certain constraints when over 50% of the pels would have to be turned on. This energy mamagement prevents damage to the printer. Four-bit binary codes are employed for determining the print current to be utilized for printing each character of an electronic font used in a resistive ribbon printer. No change of the normal print current is made for codes representing when 10-32% of the pels are turned on to print a character. For codes representing 0-10% of the pels being turned on to print a character or representing any alternate character, print current is increased by two milliamps from the normal print current (normal print current being in the order of magnitude of 27 milliamps). For 32-50% of the pels being turned on to print a character, the print current is decreased two milliamps from the normal print current. Since many of the alternate characters are defined and printed with minute voids in the black areas which are filled in by lateral flow during printing, alternate characters are printed at increased print current to foster such lateral flow.

Printing of alternate characters is stopped after five consecutive alternate characters are printed...