Electronic publishing
US4677571A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 1985 |
| Grant date | Jun 30, 1987 |
| Priority date | — |
| Expiry date | Feb 8, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2215/0062
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A novel electronic printing system for operating both a linear-raster electro-optical display device and a linear-raster type printer, which system is capable of integrating alphanumeric and/or graphics information and gray-scale or picture information, all on a single data base from which one may either (or both) print the data out on the printer as images, or display the data on the display device as images. The system includes look-up tables storing respective first and second subsets of a set of substantially disjoint multiple-bit binary index numbers. Each of the numbers of the first subset represent information corresponding to a respective gray-scale density level rendered as a respective matrix of points forming a corresponding gray-scale cell to be printed by the printer. Each of the numbers of the second subset represent information corresponding to a unique shape of an edge rendered as a respective matrix of points to be printed by the printer. Means are provided for translating an image of the information to be printed and/or displayed into an array of index numbers selected from the subsets, and for storing that array. Conversion means are provided for converting at le…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.