Discharge lamp lighting apparatus having output impedance which

Details Discharge lamp lighting apparatus having output impedance which Discharge lamp lighting apparatus having output impedance which

1991-09-24

1993-11-30

Pascal, Robert J.

Electric lamp and discharge devices: systems

Plural power supplies

Series connected current supplies

315171, 315172, 315173, 315205, 315208, 315242, 315244, 315219, 315277, 315241R, 315239, 315240, 315224, 315DIG5, 315DIG7, 315291, H05B 3700

Patent

active

052668690

ABSTRACT:
A discharge lamp lighting apparatus comprises a transformer for stepping up an AC power source voltage from an AC power source to produce a high voltage as an output voltage required for lighting a discharge lamp. Particularly, the lighting apparatus further comprises a diode for rectifying the output voltage of the transformer to be supplied to the discharge lamp. The amount of current supply from the AC power source is determined to obtain an output impedance capable of limiting the current which is to flow through the discharge lamp after the start of discharging to maintain the voltage across the discharge lamp at a level required for continuing the discharge.

REFERENCES:
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patent: 2135268 (1938-11-01), Alexanderson
patent: 2654051 (1953-09-01), Kenty
patent: 2757318 (1956-07-01), Noel et al.
patent: 2810862 (1957-10-01), Smith
patent: 3638070 (1972-01-01), Powell
patent: 3789266 (1974-01-01), Polman et al.
patent: 4394603 (1983-07-01), Widmayer
patent: 4550272 (1985-10-01), Kimura et al.

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