Vertical filtering apparatus for raster scanned display
CA 1320600 C · Owner: Lundblad, James A. · Inventors: Okun, Jerome M.; Perlman, Stephen G.; Lundblad, James A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus and method is disclosed for reducing flicker in an interlace computer generated raster-scanned display. Several circuits and methods are described for implementing vertical filtering. In general the data for a given pixel on the nth, nth+1,nth+2...nth+N line is read from memory and convolved to provide data for a given pixel on a display line before pixels data for other pixels along these lines is read from memory.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted July 20, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 20, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.