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Expired Canadian patentCanada

Full color liquid crystal display

CA 1302599 C · Owner: Prince, John Colin · Inventors: Prince, John Colin; Farrell, James Francis

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A liquid crystal display provides a high quality color image and efficient energy utilization. A layer of liquid crystal material is controlled by a transparent electrode matrix that is fixed to one surface of a fiber optic plate. A matrix of (primary color emitting) phosphors, each in alignment with a transparent electrode is fixed to the opposed surface of the plate. A source of fluorescent energy excites the phosphors. A filter located behind the fiber optic plate reflects visible light both, ambient and that emitted from the phosphors. The fiber optic plate acts as a relay lens and prevents cross pixel color contamination while the generation of backlight by the phosphor conversion of …

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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 June 2, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 2, 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.
FiledOctober 23, 1987
GrantedJune 2, 1992
Term endedJune 2, 2009
Patent numberCA 1302599 C
Classification (IPC)G09G3/00 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedOct 23, 1987Patent grantedJune 2, 1992Term endedJune 2, 2009

Sources & verification

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