Discharge lamp illumination circuit

Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Plural periodic switches or multiple contact periodic switch

Reexamination Certificate

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C315SDIG002, C315S291000

Reexamination Certificate

active

07005808

ABSTRACT:
A discharge lamp illumination circuit1has a DC-AC conversion circuit3, which effects DC-AC conversion and boosting upon receipt of a DC input, and a starter circuit4. Power output from the DC-AC conversion circuit3is controlled by means of control means6. The DC-AC conversion circuit3has an AC conversion transformer7; a plurality of switching elements5H and5L; and a resonance capacitor8. The switching elements are activated by the control means6, thereby causing serial resonance between the resonance capacitor8and a leakage inductance component of the AC conversion transformer7, or between the resonance capacitor8and an inductance component9connected to the resonance capacitor8. Provided that a resonance frequency achieved during an extinction period of the discharge lamp10is denoted as f1, the operating frequency is first regulated to a frequency level deviating from f1and then gradually reduced so as to approach f1in connection with a no-load voltage which is applied to the discharge lamp before illuminating.

REFERENCES:
patent: 5449973 (1995-09-01), Yamashita et al.
patent: 5563777 (1996-10-01), Miki et al.
patent: 5666279 (1997-09-01), Takehara et al.
patent: 6034490 (2000-03-01), Yamashita et al.
patent: 6057652 (2000-05-01), Chen et al.
patent: 6340870 (2002-01-01), Yamashita et al.
patent: 6437515 (2002-08-01), Kamoi et al.
patent: 6489732 (2002-12-01), Ito et al.
patent: 6943502 (2005-09-01), Yamanaka et al.
patent: 2005/0057181 (2005-03-01), Izumi et al.
patent: 7-142182 (1995-06-01), None
patent: 7-169583 (1995-07-01), None

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