| US 7,589,475 B2 | ||
| Electric lamp with enhanced dependability | ||
| Paul Petzl, Barraux (France); Omar Bouzghoub, Domene (France); and Gilles Morey, Saint-Ismier (France) | ||
| Assigned to Zedel, Crolles (France) | ||
| Filed on Jun. 12, 2007, as Appl. No. 11/808,709. | ||
| Claims priority of provisional application 60/814898, filed on Jun. 20, 2006. | ||
| Claims priority of application No. 06 06943 (FR), filed on Jul. 28, 2006. | ||
| Prior Publication US 2007/0290631 A1, Dec. 20, 2007 | ||
| Int. Cl. H05B 37/02 (2006.01) | ||
| U.S. Cl. 315—209R [315/224; 315/225; 315/226] | 8 Claims |
| 1. Electric lamp comprising:
at least one light-emitting diode and an electronic power switch connected in series between a power source and the light-emitting
diode and controlled by an electronic processing circuit according to a state of a control switch connected to a control input
of the electronic processing circuit, wherein
the control switch is connected in parallel to the electronic power switch between the power source and a point common to
the electronic power switch and to the light-emitting diode, and
the electronic processing circuit comprises state of the control switch detecting means periodically applying fine turn-off
pulses to a control electrode of the electronic power switch.
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