Inductively powered gas discharge lamp

Details Inductively powered gas discharge lamp Inductively powered gas discharge lamp

H - Electricity

01

J

H01J 5/50 (2006.01) H01J 61/56 (2006.01)

Patent

CA 2618406

An inductively powered gas discharge lamp (10) including both a power coil (14) and a healing coils (16) associated with each filament. The heating coils enable the filaments to he preheated before the starting voltage is applied through the power coils. The inductive power coils and the inductive heater coils are contained within the lamp envelope, allowing the lamp to be entirely sealed. A method of dimming the lamp also is disclosed. The lamp is dimmed by both decreasing the power applied to the power coils and increasing the power applied to the heating coils so as to prevent the are from extinguishing under lower voltage conditions.

L'invention concerne une lampe à décharge de gaz (10) alimentée par induction, comprenant une bobine d'alimentation (14) et des bobines thermiques (16) associées à chaque filament. Les bobines thermiques permettent aux filaments d'être préchauffés avant que la tension d'allumage ne soit appliquée à travers les bobines d'alimentation. Les bobines d'alimentation et les bobines thermiques à induction sont contenues dans l'enveloppe de lampe, permettant à la lampe d'être entièrement étanche. L'invention concerne également un procédé de gradation de l'intensité lumineuse de la lampe. La gradation de l'intensité lumineuse de la lampe est obtenue par diminution de l'énergie appliquée sur les bobines d'alimentation et par augmentation de l'énergie appliquée sur les bobines thermiques de manière à empêcher l'arc de s'éteindre dans des conditions de basse tension.

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