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Expired Canadian patentCanada

Display device and method of driving such a device

CA 1315427 C · Owner: Kuijk, Karel E. · Inventors: Kuijk, Karel E.

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Abstract From the Canadian patent

PHN 12.154 19 2.1.1988, ABSTRACT:, Display device and method of driving such a device. In a picture display device driven with an active matrix the voltage across the pixels (12) is accurately adjusted by discharging or charging the associated capacitances, if necessary, first to beyond the transition range (17) in the transmission/voltage characteristic.

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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 March 30, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 30, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 9, 1988
GrantedMarch 30, 1993
Term endedMarch 30, 2010
Patent numberCA 1315427 C
Classification (IPC)G09G3/36 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedJune 9, 1988Patent grantedMarch 30, 1993Term endedMarch 30, 2010

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.