Synchronization signal generating circuit
US4701796A · kind A · utility
12Cited by
5References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 21, 1984 |
| Grant date | Oct 20, 1987 |
| Priority date | — |
| Expiry date | Nov 21, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A circuit for generating vertical and horizontal sync signals suitable for a display which is driven by digital signals, e.g. a liquid crystal display panel of a television receiver, whereby purely digital circuit elements can be utilized throughout, as opposed to conventional sync signal generating circuits which are basically of analog type. Recognition of sync signal components derived from a composite video signal is based on time discrimination using counters and gate circuits, and the circuits can be substantially entirely implemented within a single low power-consumption integrated circuit, e.g. a CMOS IC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.