Color mixing method for variable color lighting and variable color luminaire for use with the method
CA 2110127 C · Owner: Gotoh, Shigeo · Inventors: Gotoh, Shigeo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A variable color lighting arrangement includes at least first to third light sources and at least one other light source, and allows a desired mixed color light to be obtained in a relatively simpler manner such that an, emission color of an assumed light source is first set with an emission color of one of the first to third light sources mixed with another emission color of the other light source, a mixing ratio is calculated with emission colors of remaining two or more of the plurality of light sources including at least the first to third light sources and the emission color of the assumed source and a, required mixing ratio of the respective light sources for obtaining the desired …
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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 November 26, 1993 and granted January 28, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 26, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 26, 2015.
- 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.