Light emitting diode driver circuit
CA 1211164 A · Owner: Nec Corporation · Inventors: Uda, Yoshihiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed a light emitting diode driver circuit including a differential amplifier having emitter coupled transistors a light emitting diode connected to a collector of one of the emitter coupled transistors of the differential amplifier and a current source, circuit connected to a common emitter of the emitter coupled transistors. The light emitting diode driver circuit comprises a first delay circuit for generating a first delay signal and an inverted signal in phase to the first delay signal by delaying an input signal a second delay circuit, for delaying the first delayed signal and an OR circuit for providing, logical sum of the input signal the first delayed signal and an …
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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 September 9, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 9, 2003.
- 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.