Incremental printing of symbolic information – Ink jet – Controller
Reexamination Certificate
2004-09-03
2008-12-16
Shah, Manish S. (Department: 2853)
Incremental printing of symbolic information
Ink jet
Controller
C347S010000, C347S061000, C347S062000, C347S056000, C347S057000
Reexamination Certificate
active
07465003
ABSTRACT:
The present invention is directed to a liquid discharge apparatus adapted for discharging inks from discharge holes, which includes a control unit for controlling a discharge control unit, wherein the control unit controls the discharge control unit in such a manner that pulse current delivered to one of a pair of heating resistors is caused to be reference, and pulse current is delivered to the other heating resistor in the state where timing is shifted in a time of the range within 20% of supply time of pulse current serving as reference with respect to supply timing of pulse current serving as reference. Thus, it is possible to suppress unevenness or variation of impact positions of ink droplets discharged in the state where discharge direction has been changed. As a result, deterioration of picture quality resulting from color tone unevenness and/or white stripe, etc. is prevented. Thus, print operation can be performed at excellent picture quality.
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Eguchi Takeo
Ikemoto Yuichiro
Takenaka Kazuyasu
Ushinohama Iwao
Depke Robert J.
Martin Laura E
Rockey Depke & Lyons, LLC
Shah Manish S.
Sony Corporation
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