Display device driving circuit
CA 2014532 C · Owner: Sharp Kabushiki Kaisha · Inventors: Iizuka, Taiji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A display device driving circuit for converting a binary display data into an AC signal having no DC component and supplying the AC signal to a display device including, a synchronizing circuit for receiving the display data, a binary modulating signal and a clock signal and for synchronizing the display data and the modulating signal with the clock signal a decoder, connected to the synchronizing circuit for generating a signal having a logic level corresponding to logic levels of the synchronized display data and modulating signal and a power supply circuit connected to the decoder for outputting a voltage having an amplitude corresponding to the logic level of the signal received from …
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 April 12, 1990 and granted October 4, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 2012.
- 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.