Colour picture display device with a circuit for generating a screen grid voltage
CA 1114495 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Boekhorst, Antonius
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A colour picture display device having a circuit for generating a screen grid voltage derived from the line deflection generator, whilst the high tension generator is separated. Via a resistance clement the screen grid is coupled to a source which generates a parabolic voltage of the field frequency with a curvature opposite to that obtained by rectifying the line flyback pulses owing to the east-west modulation the resistance, element, for example a voltage-dependent resistor having, in operation, a dynamic resistance which is many times lower than the static resistance thereof.
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 15, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 15, 1998.
- 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.