Method and apparatus for controlling an input voltage to a...

Details Method and apparatus for controlling an input voltage to a... Method and apparatus for controlling an input voltage to a...

H - Electricity

05

B

H05B 37/02 (2006.01)

Patent

CA 2661208

A method and apparatus for controlling an input voltage to a light emitting diode (LED) is disclosed. In one embodiment a system for controlling an input voltage to at least one LED includes an energy storage device. The energy storage device is coupled to the at least one LED. A current regulator is coupled the at least one LED for controlling activation and deactivation of the at least one LED. A control circuit is coupled to the current regulator for controlling a power supply providing an input voltage to the energy storage device, wherein the input voltage is provided in accordance with an amount of a headroom voltage measured across the current regulator.

L'invention concerne un procédé et un appareil pour commander la tension d'entrée d'une diode électroluminescente (DEL). Dans un mode de réalisation, un système pour commander la tension d'entrée d'au moins une DEL comprend un dispositif de stockage d'énergie. Le dispositif de stockage d'énergie est couplé à au moins une DEL. Un régulateur de courant est couplé à au moins une DEL pour commander l'activation et la désactivation de la DEL. Un circuit de commande est couplé au régulateur de courant pour commander une alimentation fournissant une tension d'entrée au dispositif de stockage d'énergie, la tension d'entrée étant fournie conformément à une quantité de tension de marge de sécurité mesurée aux bornes du régulateur de courant.

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