Printhead for color printer providing image edge enhancement
US5057852A · kind A · utility
33Cited by
9References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1989 |
| Grant date | Oct 15, 1991 |
| Priority date | — |
| Expiry date | Dec 18, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J11/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Apparatus and method of producing image edge enhancement in four-color printers. The true black color is aligned for printing between the cyan, magenta, and yellow colors. When a black edge is desired, process black and true black are both used to produce the pixels along the edge. Because the process and true black pixels are interleaved with each other along the edge, the effective resolution is doubled and the sharpness is enhanced along the edge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.