Drive circuit for liquid crystal display cell
CA 2387749 A1 · Owner: Payne, James E. · Inventors: Pathak, Saroj; Payne, James E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A driver circuit for use in an array (41) of picture elements (43) in a liquid crystal display is capable of displaying one set of image data while receiving a second set of image data. A first select switch transistor (S1) responsive to a first select signal (R 1,A) controls the coupling of a first image to a first storage capacitor (C1). A second select switch transistor (S2) responsive to a second select signal (R 1,B) controls the coupling of a second image to a second storage capacitor (C2). The first storage capacitor (C1) may be selectively coupled to an output node (PXL) by means of a first enable switch transistor (E1) responsive to a first enable signal (EN 1,1). The …
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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 September 19, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 19, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 19, 2022.
- 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.