Television vertical timebase circuit
US5606228A · kind A · utility
0Cited by
2References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1994 |
| Grant date | Feb 25, 1997 |
| Priority date | — |
| Expiry date | Oct 6, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/223
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A television vertical timebase circuit includes an arrangement (10, 25, 30, 35, 40, 45) for generating a vertical ramp voltage of first and second slopes corresponding to 4:3 and 16:9 aspect ratios. An arrangement (50,55,65) adds a predetermined voltage to a predetermined portion of the 16:9 ratio ramp voltage such that unwanted visible signals are positioned outside the visible screen area when displaying 16:9 aspect ratio pictures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.