Lcd controller, lcd apparatus, and information processing apparatus
CA 2059178 A1 · Owner: International Business Machines Corporation · Inventors: Takayuki, Tokuda; Fumiei, Hayashiguchi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In conventional LCD apparatus, the last line of data tends to appear in the first line. This tendency causes a serious problem in the case where the lower half portion of the LCD panel is driven separately from the upper half portion because the first line of the lower half portion is positioned in the center of the whole panel. The reason why the last line data appears in the first line is that the last line data, which is continuously applied to the data electrodes during the vertical blanking term hinders the, quick changing in potential on the data electrodes in response to the first line data of the following frame. According to this invention this disadvantage is eliminated, by …
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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 January 10, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 10, 2014.
- 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.