Digital system for raster scan display of video and alpha-numerics with single bit map memory
US4486746A · kind A · utility
6Cited by
3References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 24, 1981 |
| Grant date | Dec 4, 1984 |
| Priority date | — |
| Expiry date | Nov 24, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/36
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This invention provides a simple system for simultaneous raster scan display of video and alpha-numeric data on a single screen with provision for periodic image refreshment. It includes means for encoding the electrical signals representing the spatial intensity distribution of the video signal and the alpha-numeric signal. The coded signals are stored in a single bit map memory at the desired addresses. For display, the information is simply read from the memory through a single digital-to-analog convertor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.