Electric lamp and discharge devices: systems – Pulsating or a.c. supply – Discharge control discharge device load
Reexamination Certificate
2005-05-03
2005-05-03
Vo, Tuyet Thi (Department: 2821)
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
Discharge control discharge device load
C315S282000, C315S278000, C315S2090SC
Reexamination Certificate
active
06888320
ABSTRACT:
The invention concerns a method for powering a discharge lamp with a switching power supply. Said method is characterised in that it consists in: applying a voltage firing the lamp, then after the lamp has been energized, applying a lower service voltage to the firing voltage. The firing and service voltages can be generated by using a resonant circuit at the terminals of which a chopped voltage is applied with different frequencies. The invention also concerns a light source comprising a discharge lamp and a switching power supply. Said light source can be equipped with devices for measuring several parameters, such as power, light intensity or the amplitude of vibrations. The invention is useful for producing public lighting.
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Revised version of International Search Report for International Application No. PCT/EP01/06136 (mailed on Jan. 2, 2002).
Lempi SA
Vo Tuyet Thi
Welsh & Katz Ltd.
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