Lighting circuit for vehicular discharge lamp

Details Lighting circuit for vehicular discharge lamp Lighting circuit for vehicular discharge lamp

1991-08-21

1994-03-15

DeBoer, Todd

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

361 86, 361 87, H02H 328

Patent

active

052950360

ABSTRACT:
A lighting circuit for a vehicular discharge lamp having a DC voltage booster circuit for boosting an input voltage from a DC voltage input terminal, comprises a current detector, a voltage detector, an abnormality judging circuit, and a power cutoff relay circuit. The current detector acquires a detection signal concerning an output current of the DC voltage booster circuit. The voltage detector acquires a detection signal concerning an output voltage of the DC voltage booster circuit. The abnormality judging circuit compares the levels of the detection signals from the current detector and the voltage detector with each other to determine whether or not the lighting circuit is in an abnormal status. The power cutoff circuit inhibits power supply to the discharge lamp upon reception of a signal from the abnormality judging circuit representing an abnormality in the lighting circuit.

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