Illumination of a liquid crystal display
CA 2333989 A1 · Owner: Munch, Mark R. · Inventors: Munch, Mark R.; Tomita, Akira
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A high contrast, rapid response liquid crystal imaging system is provided. The imaging element (901) uses a liquid crystal composite (e.g. made of encapsulated liquid crystal) that is less than 4 micrometers thick and , preferably less than 2.5 micrometers thick. The imaging element is illuminated by at least one light source (903) that is positioned at an angle of less than 30 degrees off of the display normal. The viewing system (1307) is positioned on the same side of the display as the light source and is located approximately normal to the display. In one aspect the liquid crystal , composite is operated in a reverse mode and a virtual image is created. In another aspect, at …
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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 June 4, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 4, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 2021.
- 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.