Signal apparatus, light emitting diode (led) drive circuit,...

H - Electricity – 05 – B

Patent

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H05B 37/02 (2006.01)

Patent

CA 2644114

A light emitting diode (LED) circuit includes first and second terminals, a forward circuit including a number of LEDs electrically connected in series, and a forward steering diode electrically connected in series with the LEDs. The series combination of the forward steering diode and the LEDs is electrically connected between the first and second terminals, and is structured to conduct current in a first direction with respect to the first and second terminals in order to illuminate the LEDs. A reverse circuit includes a resistor, and a reverse steering diode electrically connected in series with the resistor. The series combination of the reverse steering diode and the resistor is electrically connected between the first and second terminals, and is structured to conduct current in an opposite second direction with respect to the first and second terminals such that the LEDs are not illuminated. An LED drive circuit is also disclosed.

L'invention concerne un circuit de diode électroluminescente (DEL), comprenant des premiers et seconds terminaux, un circuit avant comprenant un certain nombre de DEL électriquement connectées en série et une diode d'orientation avant électriquement connectée en série avec les DEL. L'association en série de la diode orientée vers l'avant et des DEL est électriquement connectée entre les premiers et les seconds terminaux et est structurée de manière à conduire le courant dans une première direction par rapport aux premiers et seconds terminaux afin d'allumer les DEL. Un circuit inverse comprend une résistance et une diode d'orientation inverse électriquement connectée en série avec la résistance. L'association en série de la diode d'orientation inverse et de la résistance est électriquement connectée entre les premiers et les seconds terminaux et est structurée de manière à conduire le courant dans une seconde direction opposée par rapport aux premiers et seconds terminaux afin que les DEL ne soient pas allumées. L'invention concerne également un circuit de DEL.

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