Ink jet printing method and ink jet printing apparatus
US7503635B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 2008 |
| Grant date | Mar 17, 2009 |
| Priority date | — |
| Expiry date | Apr 1, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K15/107
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An object of the present invention is to provide an ink jet printing method and ink jet printing apparatus capable of outputting a smooth monochrome photograph with indistinctive beading and conveying unevenness even in monochrome black mode for printing an image by using achromatic color inks. For this object, if it is determined that printing is carried out in the monochrome black mode, different mask patterns, such as mutually-exclusive mask patterns or mask patterns having a logical product result that shows a state where low-frequency components are less than high-frequency components, are set for two or more kinds of achromatic color inks. Use of such mask patterns suppresses the generation of grains of achromatic color inks, increases dispersibility of the grains, and also makes positions where conveying unevenness appear indistinctive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.