Pattern generating circuit
US4414567A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1981 |
| Grant date | Nov 8, 1983 |
| Priority date | — |
| Expiry date | Sep 24, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N17/045
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pattern generating circuit is disclosed for providing a fixed test pattern to be broadcast on a video display system such that an individual may test or repair the aforementioned video display system. The pattern generating circuit provides a horizontal sync signal, a vertical sync signal, and first and second video component signals which are then summed by a summing amplifier to form a video signal. The horizontal and vertical sync signals are then supplied to the video display system so as to activate the same. This, in turn, allows the video display system, upon receiving the video signal, to broadcast on its display screen the fixed test pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.