Polarized light color filter and video projector comprising the same
CA 2386138 A1 · Owner: Fujitsu General Limited · Inventors: Tajiri, Shinichiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polarized light color filter for producing R G, and B primaries from , inputted white light in time division. The filter is small in size and strong against mechanical vibration. The proportions of the R G, and B lights can be , arbitrarily varied in one period. The varying speed is high and the ratio of , utilization of the quantity of light from the light source is high. Elements (36(1), 38(1), 40(1), 38(2), 40(2), 38(3) 40(3), 38(4), and 36(2)) are in , order stacked and bonded between glass substrates (30 32). The elements , (38(1) to 38(4)) are polarized light converting elements for selecting either a mode in which the inputted light is outputted as it is by applied voltage …
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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 14, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 14, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 14, 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.