Digital blanker for scanned displays
US5068647A · kind A · utility
2Cited by
4References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1989 |
| Grant date | Nov 26, 1991 |
| Priority date | — |
| Expiry date | Apr 3, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G1/08
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital blanker for scanned displays is provided which turns off the electron beam on a Cathode Ray Tube whenever the beam is in a pre-defined area on the screen. A high speed analog to digital converter is utilized to digitize the position of either a raster or randomly scanned CRT beam. Once the beam position is digitized, the resulting number is used as an address to an EPROM. The data in the EPROM is coded to cause the CRT beam to be blanked if the beam is positioned in the predefined area where blanking is required.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.