Discharge lamp lighting device capable of preventing a flicker d

Details Discharge lamp lighting device capable of preventing a flicker d Discharge lamp lighting device capable of preventing a flicker d

1994-04-12

1996-01-16

Pascal, Robert J.

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315209R, 315 82, 315DIG7, H05B 4114

Patent

active

054850614

ABSTRACT:
An inverter circuit produces a proper electric power to be supplied to a discharge lamp. A feedback control system detects a lamp voltage and a lamp current, or a lamp power of the discharge lamp, and feedback-controls the inverter circuit based on the detected at least one of the lamp voltage, lamp current and lamp power. A response switching circuit switches a response speed of the feedback control system so that the response speed is high in a low luminous efficiency region, and is low in a high luminous efficiency region.

REFERENCES:
patent: 5142203 (1992-08-01), Oda et al.
patent: 5233273 (1993-08-01), Waki et al.
patent: 5365152 (1994-11-01), Ozawa et al.

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