Video signal mixing unit for simultaneously displaying video signals having different picture aspect ratios and resolutions
US4878117A · kind A · utility
53Cited by
3References
8Claims
0Family size
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Key dates
| Filing date | Feb 12, 1988 |
| Grant date | Oct 31, 1989 |
| Priority date | — |
| Expiry date | Feb 12, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display control unit for combining first video signal transmitted from a first video information source which is controlled by a first pixel clock and a first synchronizing signal with second video signal transmitted from a second video information source which is controlled by a second pixel clock and a second synchronizing signal so that the first and the second video signals can be displayed on a CRT display device which is controlled by the first pixel clock and the first synchronizing signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.