Display apparatus having a plurality of display elements
CA 1255405 A · Owner: Kabushiki Kaisha Toshiba · Inventors: Noda, Tomimitsu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A display apparatus including a display device which is formed with a plurality of display elements. A drive circuit supplies a drive voltage from a rectified AC commercial supply voltage to the individual display elements. A control circuit controls the drive circuit to sequentially energize the display elements over a phase angle of the AC supply which minimizes differences in the voltage applied across the individual display elements thus, avoiding flickering in the display of the display device even if fluctuations of the drive voltage applied to the display elements occur.
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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 June 6, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 6, 2006.
- 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.