Video image positioning control system
US4054919A · kind A · utility
11Cited by
2References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 15, 1975 |
| Grant date | Oct 18, 1977 |
| Priority date | — |
| Expiry date | Sep 15, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G1/165
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
For controlling the direction and rate of movement of an image on a raster scan display, a first set of counters is arranged to generate digital pulses for use as horizontal and vertical sync pulses for use in conjunction with a video adder for controlling the image on the display. Means, such as a second set of counters, driven by another clock means, provides an output which is compared to that of the first named counters to provide information signals to the video adder for controlling the location and movements for the image being displayed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.