Lamp-operating unit and low-pressure mercury discharge lamp

Details Lamp-operating unit and low-pressure mercury discharge lamp Lamp-operating unit and low-pressure mercury discharge lamp

2005-02-04

2008-11-18

Philogene, Haissa (Department: 2821)

Electric lamp and discharge devices: systems

Combined load device or load device temperature modifying...

Discharge device load

C315S063000, C315S2090SC, C315S244000, C315S22700A, C313S046000, C313S493000, C313S634000

Reexamination Certificate

active

07453214

ABSTRACT:
The present invention aims to provide an inrush current limiting resistor for suppressing inrush current, and to avoid an excessive current flowing through the inrush current limiting resistor even if the lamp is operated at a dimmed level by mistake. A compact self-ballasted fluorescent lamp1is composed of a holder20and a case30attached to each other. The case30houses therein a lighting unit50for operating an arc tube10. The lighting unit50is composed of a rectifier/smoothing circuit module having an electrolytic capacitor53, an inverter circuit module, and a resonant circuit module having a resonance capacitor54. The circuit modules are mounted on a printed wiring board51. An inrush current limiting resistor62is connected to the input end of the rectifier/smoothing circuit module and in contact with the electrolytic capacitor53and the resonance capacitor54at their outer circumferential surfaces.

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