Printing method and a printing apparatus
US6474777B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2000 |
| Grant date | Nov 5, 2002 |
| Priority date | — |
| Expiry date | Aug 17, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2215/0094
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To make it possible to print a smooth image without color irregularity at a high speed by a printing apparatus using a color ink-jet head provided with plural arrays of ink ejection openings side by side in the direction of the main scanning corresponding to different color inks, moving this head to scan reciprocally, and also adopting a multi-pass printing method for divided printing on a certain area by scanning at plural times with the color ink-jet head. In the multi-pass printing using the color ink-jet head, an ink firstly landed on a certain area determines a prioritized color influential on the color tone. Moreover, a printing medium is largely covered by a first two-pass printings. Namely, if it is possible to suppress the color irregularity in the first two passes, a harmful influence on a whole image by the color irregularity can remarkably reduced, therefore, the first pass data printing ratio to the area is set smaller than that of the second pass and thereafter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.