Projection display device and projection display system
CA 2559994 C · Owner: Era, Kazunari · Inventors: Era, Kazunari
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A projection display device D includes an acquiring means 2 that acquires a pixel value Cg and a depth value Cz for each of a plurality of pixels constituting an image, a light output means 3 that outputs pixel display light Ld per pixel according to the pixel value a light guide body 5, that guides the pixel display light Ld to a position corresponding to the pixel, on a projection surface 8, and changes the light path length of the pixel display light Ld to the projection surface 8 according to the depth value Cz of, the pixel. The light guide body 5 includes a reflector 51 that has mirror surfaces 511a opposing each other. The light path length control means 3 changes the number of …
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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 April 1, 2005 and granted May 29, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 1, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.