High-voltage discharge lamp operating device
CA 2493285 A1 · Owner: Sasaki, Naoki · Inventors: Sasaki, Naoki; Kanno, Tomoyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A high-voltage discharge lamp operating device capable of reducing the size and the weight of a DC-DC converter circuit and accordingly of the operating , device without generating any magnetic saturation of a transformer core part even when igniting a lamp in the operating device for operating a HID head lamp for a vehicle. A PWM control unit (6) comprises a power control unit (31) which receives a voltage detection signal and controls the duty of the signal waveform of a PWM control signal, an error amplifier (32) which compares the output from the power control unit (31) with the reference voltage and outputs an error level signal, an oscillation frequency control means (36) for …
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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, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 22, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 22, 2024.
- 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.