Image sensing
CA 1331048 C · Owner: Morris, William · Inventors: Morris, William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
To maintain a maximum ratio of signal charge to background charge in a CCD image detector a background, level of illumination of the CCD is maintained at a minimum level consistent with adequate fast charge transfer. This is conveniently accomplished by varying the intensity of radiation from a source within the detector incident on the CCD in dependence upon comparison between an averaged video output of the detector and a reference signal characteristic of optimum illumination of the CCD.
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
- Granted July 26, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 26, 2011.
- 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.