CRT display control system
US4772883A · kind A · utility
5Cited by
5References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 8, 1987 |
| Grant date | Sep 20, 1988 |
| Priority date | — |
| Expiry date | Jun 8, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/227
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A CRT display control system controls a character display operation on a CRT image screen. The entire character line height is divided into a display allowed raster section and a display inhibited raster section. The display allowed raster section is provided for displaying characters. The display inhibited raster section functions as a line spacing. When the character matrix size is changed, the display allowed raster section and the display inhibited raster section are modified through the use of a preset system so that the line spacing is easily determined without modifying the circuit construction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.