Method and device for operating a fluorescent tube in an...

H - Electricity – 05 – B

Patent

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H05B 41/295 (2006.01)

Patent

CA 2459226

The invention relates to a method and a device for operating a fluorescent tube, especially a T5-fluorescent tube in an energy saving manner. In a first operational mode, a spiral-wound filament disposed on an end of the fluorescent tube is impinged upon by a heating current and a second spiral- wound filament disposed on an end opposite the end of the fluorescent tube is impinged upon by a second heating current. The second spiral-wound filament is connected to an energy saving circuit arrangement. In a second mode of operation, impingement of the spiral-wound filament and the second spiral wound filament with the heating current or the second heating current is interrupted. The inventive device is provided with monitoring means which are contained in the electronic circuit in order to monitor an operating parameter of the second spiral-wound filament in the first and second mode of operation. Said electronic circuit enables control of the time interval of impingement of the second spiral-wound filament by the second heating current according to the time interval of impingement of the first spiral-wound filament with the first heating current.

L'invention concerne un procédé et un dispositif destinés au fonctionnement économique d'un tube fluorescent, notamment d'un tube fluorescent T5. Dans un premier mode de fonctionnement, un premier filament boudiné situé sur une extrémité du tube fluorescent reçoit un premier courant de chauffage, et un deuxième filament boudiné situé sur une extrémité opposée du tube fluorescent reçoit un deuxième courant de chauffage. Le deuxième filament boudiné est relié à un circuit d'économie d'énergie. Dans un deuxième mode de fonctionnement, l'alimentation de courant de chauffage aux deux filaments boudinés est interrompue. Le dispositif selon l'invention comporte des éléments de contrôle compris dans un circuit électronique, destinés à contrôler un paramètre de fonctionnement du deuxième filament boudiné dans le premier et le deuxième mode de fonctionnement. Ledit circuit électronique permet de commander un intervalle d'alimentation du deuxième courant de chauffage au deuxième filament boudiné dépendant d'un intervalle d'alimentation du premier courant de chauffage au premier filament boudiné, en fonction du paramètre de fonctionnement contrôlé.

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