Inkjet recording apparatus having a minimum number of ejection e

Details Inkjet recording apparatus having a minimum number of ejection e Inkjet recording apparatus having a minimum number of ejection e

1997-11-20

1999-12-07

Barlow, John

Incremental printing of symbolic information

Ink jet

Ejector mechanism

B41J 206

Patent

active

059971339

ABSTRACT:
An inkjet recording apparatus includes K ejection electrodes and M counter electrodes which are located at a distance from and opposed to the K ejection electrodes. A first voltage pulse is applied to a selected one of N groups of ejection electrodes each group formed by electrically connecting an i.sup.th (1.ltoreq.i.ltoreq.N) ejection electrode for each counter electrode to each other and a second voltage pulse is applied to a selected one of the M counter electrodes. A voltage difference is generated between a group and a counter electrode which are selected from the N groups and the M counter electrodes depending on an input signal, wherein the voltage difference is equal to or greater than a minimum voltage difference which causes ejection of ink from an ejection electrode.

REFERENCES:
patent: 5559586 (1996-09-01), Wada
patent: 5619234 (1997-04-01), Nagato et al.

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