Lighting ballast having boost converter with on/off control and method of ballast operation
CA 2590699 C · Owner: Chitta, Venkatesh · Inventors: Chitta, Venkatesh; Gawrys, Brent M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A ballast for driving a gas discharge lamp comprising a rectifier stage (12) having an alternating current (AC) input and providing a rectified output voltage, a boost converter stage (14) receiving the rectified output voltage as an input and providing a boosted direct current (DC) output voltage across a DC bus (20), an inverter output stage (50) for converting the DC bus voltage to a high-frequency AC output voltage to drive the lamp (60) further , comprising a control stage (15) receiving a desired light level signal controlling the desired light level of the lamp and providing an output control signal for turning the boost converter stage on or off in dependency on the desired …
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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 December 12, 2005 and granted July 24, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 12, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.