Printing apparatus, method of printing, and recording medium
US6428138B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2000 |
| Grant date | Aug 6, 2002 |
| Priority date | — |
| Expiry date | Mar 24, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J19/142
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In an ink jet printer with a print head having two nozzle rows arranged at different positions in a main scanning direction, that is, a 0th nozzle row and a 1st nozzle row, with regard to each color ink, common driving waveforms are used to drive both the 0th nozzle row and the 1st nozzle row. The driving waveforms are periodically and successively output in a specific cycle where a plurality of driving waveforms are allocated to each pixel. A specific relation between the driving waveforms and a pixel is regulated individually for the respective nozzle rows using two latch signals. For example, in the case of nozzles included in the 0th nozzle row, dots are created in a certain pixel with driving signals S1 through S4. In the case of nozzles included in the 1st nozzle row, on the other hand, dots are created in a certain pixel with driving signals S3 through S6. Regulating the interval between the two latch signals enables the positions of dots in the main scanning direction formed by the respective nozzle rows to be finely adjusted in the unit of a driving signal. This arrangement effectively prevents a positional misalignment of dots in the main scanning direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.