Alignment of cathode ray tube displays using a video graphics controller
CA 2277312 A1 · Owner: Webb, James R. · Inventors: Webb, James R.; Simpson, Ron C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Dynamic adjustment techniques for aligning video images in cathode ray tube (CRT) devices (12) are disclosed. A host computer (10) stores correction factor data and video image data in video graphics controller RAM (20). The host computer (10) processes and transmits the correction factor data representative of the cathode ray tube distortion characteristics to the CRT , device (12) during the retrace time of the electron beam and video image data during the trace time. The correction factor data may be generated by a vision system, a gain matrix table, interpolation engine or manual methods. Circuitry, within the CRT device (12), for separating the correction factor data from the …
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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
- Filed December 5, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 5, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 5, 2019.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.