Discharge lamp operating circuit with on time control of switchi

Details Discharge lamp operating circuit with on time control of switchi Discharge lamp operating circuit with on time control of switchi

1998-02-11

2000-07-04

Philogene, Haissa

Electric lamp and discharge devices: systems

Current and/or voltage regulation

315307, 315209R, 315244, 315DIG5, 315DIG7, G05F 100

Patent

active

060843616

ABSTRACT:
A circuit arrangement for supplying a discharge lamp, comprising a converter for generating a high-frequency current with a frequency f from a supply voltage. The converter comprises at least one switching element which is rendered alternately conducting and non-conducting at the frequency f while the discharge lamp is being supplied. In addition a circuit portion I is provided for the low-frequency modulation of the power consumed by the discharge lamp through an adjustment of the conduction period of the switching element. As a result, instabilities in the discharge lamp plasma, such as striations and moding, are suppressed to a considerable degree.

REFERENCES:
patent: 4373146 (1983-02-01), Bonazoli et al.
patent: 4677345 (1987-06-01), Nilssen
patent: 5365151 (1994-11-01), Spiegel et al.
patent: 5410221 (1995-04-01), Mattas et al.
patent: 5414327 (1995-05-01), Reijnaerts
patent: 5528117 (1996-06-01), Buij et al.
patent: 5550722 (1996-08-01), Bouwman et al.

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