Ink jet recording apparatus and method of driving the same
AssigneeSeiko Epson Corporation
InventorsTomoaki Takahashi, Tomohiro Sayama, Goki Hiramoto
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Abstract
A recording head provided with a plurality of nozzles, a plurality of pressure chambers, each communicated with one nozzle, and a plurality of pressure generating elements, each associated with one pressure chamber and actuated to eject ink from one associated nozzle. An ejection controller specifies a nozzle from which an ink droplet having the least weight is ejected as a reference nozzle. A driving signal generator generates a driving signal applied to the respective pressure generating elements. The drive signal has a driving voltage determined such that an ink droplet ejected from the reference nozzle has a predetermined flight velocity or more.
Claims18
An ink jet recording apparatus, comprising:
- a recording head provided with:
- a plurality of nozzles;
- a plurality of pressure chambers, each communicated with one nozzle;
- and
- a plurality of pressure generating elements, each associated with one pressure chamber and actuated to eject ink from one associated nozzle;
- an ejection controller, which specifies a nozzle from which an ink droplet having the least weight is ejected as a reference nozzle;
- and
- a driving signal generator, which generates a driving signal applied to the respective pressure generating elements, the drive signal having a driving voltage determined such that an ink droplet ejected from the reference nozzle has a predetermined flight velocity or more.
A method of driving an ink jet recording apparatus, comprising the steps of:
- providing a recording head provided with:
- a plurality of nozzles;
- and
- a plurality of pressure generating elements, each associated with one nozzle and actuated to eject ink therefrom;
- measuring weights of the respective ink droplets ejected from the recording head;
- specifying a nozzle from which an ink droplet having the least weight is ejected as a reference nozzle;
- generating a drive signal having a driving voltage determined such an extent that an ink droplet ejected from the reference nozzle has a predetermined flight velocity or more.
Dependencies are inferred from the claim text.