High resolution printing
US6318832A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2000 |
| Grant date | Nov 20, 2001 |
| Priority date | — |
| Expiry date | Mar 24, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/5056
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An ink jet printer receives image data defining a pattern of dots in a non-square rectangular grid and prints the pattern of dots on a print medium based on the image data. The pattern of dots consists of at least four interlaced checkerboard arrays of dots printed in four passes of the print head across the print medium, where each one of the four checkerboard arrays is printed during a different one of the four passes. Each of the checkerboard arrays is offset from the other checkerboard arrays by a predetermined spacing in at least one of the first and second directions. The printer prints the second checkerboard array horizontally offset from the first checkerboard array by a distance substantially equivalent to 5d/4, where d is the diameter of the printed dots. The printer prints the third checkerboard array vertically offset from the second checkerboard array by a distance substantially equivalent to -d/2 and horizontally offset by a distance substantially equivalent to -3d/4. The printer prints the fourth checkerboard array horizontally offset from the third checkerboard array by a distance substantially equivalent to -3d/4. This dot placement method optimally covers a grid …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.