Printing apparatus and method for tri-level color imaging
US5680167A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 3, 1992 |
| Grant date | Oct 21, 1997 |
| Priority date | — |
| Expiry date | Jan 3, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/504
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A non-impact printing apparatus and method for tri-level color xerographic recording. A binary printhead having M recording elements per inch is used to record each mainscan line (1/M lines per inch) of pixels using two sublines for recording each mainscan line. In a first embodiment, pixels to be developed in a first color are recorded during a first subline, and during a second subline of pixels to be developed in a second color are recorded using a different exposure duration from that used in recording the first subline of pixels. In a second embodiment, pixels of the first and second colors are recorded during a first subline and supplementary exposure is provided for completing the recording of pixels of the second color during a second subline of recording.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.