Gray-scale driver for fixed-intensity electronic display
CA 2247794 A1 · Owner: Tetra Technologies Inc. · Inventors: Vincent, Marc
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and a driver are provided for enabling a fixed-intensity electronic display, such as a BDVFD to, produce multiple levels of intensity or gray-scale on a pre-pixel basis. This is achieved by sequencing several fields at a rate that is at least double and preferably several times the normal minimum refresh rate set for the display.
Read the whole patent
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 September 25, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 25, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 25, 2020.
- 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.