Electronic switch matrix for a video display system
US5138309A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1990 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | Apr 3, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2300/0847
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electronic switch matrix for a video projection system has a plurality of switch elements, each of which is associated with a respective one of the display pixels in a MxN array. A first counter, in response to a pixel clock and the horizontal sync signal, provides the column timing for activating the switch elements. Similarly, a second counter, in response to a row block and the vertical sync signal, provides the row timing for activating the switch elements. A switch element activated simultaneously by each counter then couples the luminance signal to a video display circuit element for developing the appropriate pixel intensity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.