Projector that automatically adjusts the projection parameters
CA 2276484 A1 · Owner: Kimura, Syunsuke · Inventors: Kawashima, Masahiro; Kimura, Syunsuke; Gyoten, Takaaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A projector 100 projects an image onto a screen 200 by having light from a light source 111 pass through light valves 108 ~ 110 corresponding to RGB colors and a projection lens 101. A special pattern is displayed on the light valves 108 ~ 110 so that an image of the special pattern is projected onto the screen 200. The projector includes a half mirror 112 that directs light which has been reflected back off this image on the screen 200 and back through the light valves 108 ~ 110 toward the collective lens 113, and a light detecting element 114 for detecting the intensity of the light collected by the collective lens 113. Based on the detected intensity, the microcomputer 116 automatically …
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 June 25, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 25, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 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.