Illuminated electro-optical display apparatus
CA 1081833 A · Owner: Micro Display Systems, Inc. · Inventors: Evanicky, Daniel E.; Hull, Virgil J.; Ristagno, Charles V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved illuminated electro-optical display system includes front and rear optically transmissive panels that are spaced apart in substantially parallel configuration. A liquid crystal composition occupies the space between the front and rear panels. Optically transmissive electrodes are disposed on the opposing surfaces of the front and rear panels. The electrodes are attached to suitable electrical leads whereby a voltage can be impressed between selected front and rear electrodes. A multi-cellular light diffusing panel is located behind the rear optically transmissive panel and a light source is located behind the multi-cellular light diffusing panel. Light from the light source is …
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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 July 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 15, 1997.
- 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.