Ink jet color graphics printing
US5012257A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1990 |
| Grant date | Apr 30, 1991 |
| Priority date | — |
| Expiry date | Mar 16, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/2132
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a color ink jet printing system, an image superpixel (84, 86, 88) consists of a 2 by 2 array of cells (1-4), each cell corresponding to a pixel area on the substrate (80). Each pixel (55) of graphics data is processed to form a 2 by 2 array of bit image data (40), for printing a corresponding superpixel image (68). A superpixel configuration (86), indicating cell location and color of drops of ink for forming a superpixel image, is defined for each desired image color. Superpixel configurations control printing so that drops of ink (Y,M,C) are deposited only an a diagonally adjacent pair of cells (1,4), with no more than two drops of ink per cell, and no more than three drops of ink per superpixel. This superpixel strategy provides for printed images (62,64) perceivable as having the desired image color and having good color saturation, while minimizing bleed across color field boundaries (66).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.