Raster scan display system
US4580135A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 1983 |
| Grant date | Apr 1, 1986 |
| Priority date | — |
| Expiry date | Aug 12, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/40
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A raster scan display system includes a plurality of storage maps. These maps are addressable in either of two modes. In the first mode each map contains bit mapped data and the maps are addressed together to provide color signals from which color video signals are derived. In the second mode, one map contains character representing data and a further map, character display dot patterns. In this mode the first map is addressed to provide partial addresses for the further map. These partial addresses are combined with row scan data signals to access the further map from which the character display dot data is used to generate the video signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.