Discharge lamp lighting apparatus which can control a lighting p

Details Discharge lamp lighting apparatus which can control a lighting p Discharge lamp lighting apparatus which can control a lighting p

1994-10-05

1995-10-31

Pascal, Robert J.

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315291, 315209T, 315209CD, G05F 100

Patent

active

054632870

ABSTRACT:
A lighting apparatus for a discharge lamp (15) has a power adjustment unit (11,13) for adjusting electrical power to be supplied to the discharge lamp, an ignition pulse circuit (17) for producing at least one ignition pulse to be applied to the discharge lamp, and a computer control circuit (19) electrically connected with the power adjustment unit and the ignition pulse circuit. The computer control circuit (19) controls the power adjustment unit and the ignition pulse circuit so that at first the power adjustment unit (11,13) supplies an idling voltage to the discharge lamp, then the ignition pulse circuit (17) lights up the discharge lamp by applying at least one ignition pulse to the discharge lamp, and thereafter the power adjustment unit (11,13) controls lamp power of the discharge lamp to a target lamp power.

REFERENCES:
patent: 5140229 (1992-08-01), Yagi et al.
patent: 5204587 (1993-04-01), Mortimer et al.
patent: 5381074 (1995-01-01), Rudzewicz et al.

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