Driving apparatus for an active addressed display
CA 2205890 C · Owner: Motorola, Inc. · Inventors: Barrett, Raymond Louis Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A display system (500) processes an input signal to generate an image. The input signal includes successive frames of data defining lines which include image values and have a line direction. A display (100) for displaying the image has second electrodes (104) which are in a direction corresponding to the line direction. A video memory (640) which stores a frame of data includes a single line buffer (602) and a single frame buffer (608). A controller (622) controls storage of the frame of data into the video memory (640) and generates a predetermined image independent function during a time slot. A calculation engine (632) computes an image dependent output signal during the time …
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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
- Filed November 22, 1995 and granted September 21, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 22, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 22, 2017.
- 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.