Printing device and method for determining print speed-dependent print data for the operation of a nozzle
AssigneeCanon Production Printing Holding B.V.
InventorsMartin Stockmar, Timo Sponer, Martin Wilhelm, Robert Baumgartner, Christoph Rummelsberger, Markus Keller
Life of this patent
Estimating the term…
Abstract
In the print data for a nozzle of a printer, white dots are replaced by pre-ejection pulses. One or more repetitions of the pre-ejection pulses may be inserted into the print data, depending on the actual print speed of the printer, to determine print speed-dependent print data with which the nozzle is activated to print a print image with high print quality.
Claims11
A method for determining print speed-dependent print data for the operation of at least one nozzle of an inkjet printer configured to print a print image onto a recording medium, the method comprising:
- determining image content-dependent print data based on the basis of print data for the print image to be printed, the print data for a sequence of lines of the print image respectively indicate whether a non-white dot or a white dot is to be printed, wherein the determination of the image content-dependent print data includes replacing at least one data set for a white dot with a data set for a pre-ejection pulse, the pre-ejection pulse being configured to move ink in the nozzle without producing an ink ejection;
- inserting one or more repetitions of the pre-ejection pulse, based on an actual print speed with which successive lines of the print image are to be printed onto the recording medium, to determine print speed-dependent print data based on the image content-dependent print data;
- and
- controlling the nozzle to print the print image based on the print speed-dependent print data.
An inkjet printer, comprising:
- at least one nozzle configured to print dots for a sequence of lines of a print image onto a recording medium;
- and
- at least one controller configured to:
- determine image content-dependent print data for the print image to be printed based on basic print data, the basic print data for the sequence of lines of the print image respectively indicating whether a non-white dot or a white dot is to be printed by the nozzle, wherein the image content-dependent print data is determined by replacing at least one data set for a white dot from the basic print data with a data set for a pre-ejection pulse, the pre-ejection pulse being configured to move ink in the nozzle without producing an ink ejection;
- insert one or more repetitions of the pre-ejection pulse to determine print speed-dependent print data based on the image content-dependent print data, wherein the one or more repetitions of the pre-ejection pulse are inserted depending on an actual print speed with which successive lines of the print image are to be printed onto the recording medium;
- and
- activate the nozzle, based on the print speed-dependent print data, to print the print image.
Dependencies are inferred from the claim text.