Drive circuit for matrix displays
CA 1165482 A · Owner: The Government Of The United States As Represented By The Secretary Of T He Army · Inventors: Miller M. Robert; Tuttle, Richard P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a capacitive voltage divider drive circuit for electroluminescent matrix displays comprised of for example, thin film electrolumi-, nescent capacitance type elements. The drive circuit for each display element which exhibits a relatively low capacitance includes a relatively large series, connected capacitor which couples a drive voltage thereacross upon the closure of a first switching element. Due to voltage divider action a relatively, greater portion of the drive voltage appears across and energizes the display element by exceeding its threshold voltage. Additionally another relatively, large capacitor is coupled in parallel with the display element upon the closure of a …
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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 April 10, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 10, 2001.
- 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.