Method for continuously and automatically monitoring the electrical efficiency and control consistency in a liquid crystal display unit
CA 1308501 C · Owner: Principe, Francesco · Inventors: Gargano, Vito; Principe, Francesco
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for continuously and automatically monitoring the electrical efficiency and control consistency in a liquid crystal display unit consisting of determining the discharge or charge time of the capacitor having as its plates each segment and the backplane or return electrode of the display unit when the feed to said segment has been disconnected said time being determined by a binary counter which commences at the moment of disconnection of said feed and stops when the capacitive discharge or charge voltage of said capacitor, converted into digital differs from the, segment feed wave. The method also comprises monitoring the control consistency and the presence of the capacitive …
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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 October 6, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 6, 2009.
- 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.