Luminance control circuit for a television receiver
CA 1138099 A · Owner: Sony Corporation · Inventors: Okada, Takashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A luminance control circuit for a television receiver produces a control signal in response to a video signal exceeding an end of the dynamic range of a cathode ray tube. Gain control circuits in the path of the video signal to the cathode ray tube adjust their gain in response to the control signal to maintain the video signal within the dynamic range of the cathode ray tube. The end of the dynamic range at which the video signal may be controlled includes one or both of the while peak and black levels. The control signal may also be responsive to an average cathode ray tube beam current exceeding a predetermined value. -1-
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 December 21, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 21, 1999.
- 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.