Ink jet printing apparatus and ink jet printing method

A technology of an inkjet printing device and a printing head, which is applied in printing devices, printing, etc., and can solve problems such as color unevenness, print quality degradation, and color tone differences

Inactive Publication Date: 2011-08-24
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, there is a difference in color tone (color unevenness) between the image printed by the overlapped part and the image printed by the other part
This may adversely affect print quality

Method used

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  • Ink jet printing apparatus and ink jet printing method
  • Ink jet printing apparatus and ink jet printing method
  • Ink jet printing apparatus and ink jet printing method

Examples

Experimental program
Comparison scheme
Effect test

no. 2 Embodiment

[0093] A second embodiment of the present invention will now be described. The second embodiment corresponds to the structure shown in the above-mentioned embodiments, and in which the threshold for controlling the overlap area mask is increased if the number of main scans per unit area is large. The 2nd embodiment is also constructed as Figure 1 to Figure 7 shown.

[0094] The second embodiment enables selective two-pass printing or 8-pass printing described in the first embodiment; in 8-pass printing, an image is completed by performing 8 main scans per unit area. That is, in the second embodiment, as masks corresponding to the number of passes, a mask pattern for two-pass printing and a mask pattern for eight-pass printing are stored in the mask pattern storage section 621 . In addition, the mask M and the mask N are stored in the overlapping area B mask pattern storage section 622 as in the case of the above-described embodiment. However, if Figure 15 As shown in , t...

no. 3 Embodiment

[0101] A third embodiment will now be described.

[0102] The first and second embodiments use a connection head including head chips (nozzle arrays) for two colors arranged side by side in one print head. However, the present embodiment uses a connection head including head chips (nozzle arrays) for 3 colors arranged side by side in 1 print head. In this embodiment, such a connector is used to print an image by two-pass printing.

[0103] Figure 16 The structure of the connector that can be used in this embodiment is shown. exist Figure 16 Among them, the connection head 33 includes two print heads 331 and 332 . The print head 331 includes: a head chip 331c having arranged therein a plurality of nozzles for ejecting cyan ink, a head chip 331M having arranged therein a plurality of nozzles for ejecting magenta ink, and a head chip 331c having arranged therein a plurality of nozzles for ejecting magenta ink. A head chip 331Y of a plurality of nozzles for ejecting yellow ...

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PUM

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Abstract

The invention provides an ink jet printing apparatus and an ink jet printing method. This invention has a plurality of print heads, each including a first and second nozzle arrays. The different print heads are arranged so as to include an overlap area. The difference in distribution rate between the plurality of nozzle arrays for the same color is set to be larger when the number of ejections in the overlap portion is equal to or larger than the threshold than when the number of ejections in the overlap portion is smaller than the threshold. The print data for the same color is distributed among the plurality of nozzle arrays for the same color so that the number of pixels with the same ink overlap sequence as that in the non-overlap areas is larger than the number of pixels with an overlap sequence different from that in the non-overlap areas when the number of ejections is equal to or larger than the predetermined threshold.

Description

technical field [0001] The present invention relates to an inkjet printing apparatus configured to perform printing by providing relative scanning between a printing medium and a printing head while ejecting ink through the printing head, the printing head comprising a An array of multiple nozzles that eject different colored inks. Background technique [0002] For inkjet printing devices, various structures have been proposed with the intention of increasing the printing speed and miniaturizing the device. For example, a means effectively applicable to printing large-size sheets such as A2 and A0-size sheets at high speed increases the number of rasters that can be printed during a single main scan, that is, increases the length of the print head. The method for increasing the length of the print head increases the number of nozzles arranged in the print head to eject ink. However, the manufacture of a single long print head in which a large number of nozzles are arranged...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/01B41J2/145B41J29/393
CPCB41J2/2132B41J2/2103
Inventor 原胜志
Owner CANON KK
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