Electro-optic switching devices using ferroelectric liquid crystals
CA 1299721 C · Owner: Displaytech, Incorporated · Inventors: Handschy, Mark A.; Clark, Noel A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electro-optic switching device using ferroelectric liquid crystals to either transmit or reflect the incident light depending upon the molecular orientation of the ferroelectric liquid crystal molecules. An applied voltage causes the ferroelectric molecules to switch from a first state in which the incident light is substantially transmitted to a state in which the incident light is substantially reflected. This is accomplished by effectively changing the refractive index of the ferroelectric liquid crystal in the different states. The ferroelectric liquid crystal is disposed between two dielectric mediums such as glass so as to define a boundary which either causes incident light to …
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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 28, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 28, 2009.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.