Dual-mirror virtual image display for vehicle instrument cluster
CA 2030874 C · Owner: Chern, Mao-Jin · Inventors: Norton, Paul C.; Hegg, Ronald G.; Chern, Mao-Jin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A virtual image display for vehicles that includes an image source for providing imaging illumination a, negative power aspheric off-axis mirror responsive to the image source imaging illumination for providing diverging reflected imaging illumination, and a positive power aspheric off-axis mirror responsive to the diverging imaging illumination for providing converging reflected imaging illumination that produces a virtual image of the image source observable by the vehicle operator at a viewing distance that is greater than the optical path travelled by the imaging illumination from the image source and the eyes of the vehicle operator. The use of a negative power mirror with a positive …
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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, 1990 and granted November 1, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 26, 2012.
- 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
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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.