EP 1013424 A2 20000628 - Apparatus and method for controlling a charging voltage in ink jet printers
Title (en)
Apparatus and method for controlling a charging voltage in ink jet printers
Title (de)
Vorrichtung und Verfahren zur Regelung der Ladespannung in Tintenstrahlschreibern
Title (fr)
Appareil et méthode pour le réglage de la tension de charge dans les imprimantes à projection d'encre
Publication
Application
Priority
US 21107998 A 19981214
Abstract (en)
The present invention provides for adjustment of the charging voltage to a discrete section of the array, increasing the operating range of the printhead. The array of charging electrodes (22) are broken into segments with relative voltage adjustment to each segment. The voltage to the charge plate electrodes is then switchably controlled by discrete high voltage driver chips (56) to enable drop selection for printing. The integrated circuit within each chip converts serial input data at low voltages to parallel outputs at high voltage. The supplied high voltage to each of these chips is varied to compensate for impact variations on the catcher face caused by non-uniform parts. The compensation levels required for a set of aligned parts are stored within the printhead memory. The printhead will then function with the correct compensation levels on any system in which it is installed. <IMAGE>
IPC 1-7
IPC 8 full level
B41J 2/075 (2006.01); B41J 2/085 (2006.01)
CPC (source: EP)
B41J 2/085 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1013424 A2 20000628; EP 1013424 A3 20010103; EP 1013424 B1 20070912; CA 2292412 A1 20000614; DE 69937095 D1 20071025; DE 69937095 T2 20080612; JP 2000218794 A 20000808
DOCDB simple family (application)
EP 99309534 A 19991129; CA 2292412 A 19991210; DE 69937095 T 19991129; JP 35426599 A 19991214