High definition screen
CA 2389045 A1 · Owner: Debard, Gerard · Inventors: Debard, Gerard; Giry, Francois; Piccaluga, Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Screens are already used for projecting images in cinema video projection, television, computers and slides. Not all of these screens bring the image to life sufficiently due to a saturation with light which overwhelms the image and which is too intense for the eye. The aim of the inventive method is to respect the physiological parameters of sight and present the image in three dimensions and to give it a chromatic dynamic and a much greater range of shades, the latter being obtained by light diffraction of multilayer screens. The multiple layers diffract the rays of light coming from the projector which are partially reflected on at least one first transparent or translucid layer …
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 October 24, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 24, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 24, 2022.
- 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.