Lighting circuit for vehicular discharge lamp

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

Filed on

1991-09-16

Date issued

1992-09-29

Examiner

LaRoche, Eugene R.

Patent Class

Electric lamp and discharge devices: systems

SubClass

With automatic shunt and/or cutout

SubSubClass

Supply circuit current and/or potential actuated switch

Other Related Categories

315 82, 315308, 307 108, 340641, H05B 3700, B60Q 102

Type

Patent

Status

active

Patent number

051516314

Description

ABSTRACT:
A lighting circuit for a vehicular discharge lamp for lighting a discharge lamp using a DC power supply, comprises an OFF state detector, a DC input voltage detector and a power cutoff means. The OFF state detector detects an OFF status of a discharge lamp. The DC input voltage detector detects if a DC input voltage is within a predetermined range. The power cutoff means inhibits power supply to the discharge lamp when the OFF status of the discharge lamp is detected by the OFF state detector and the DC input voltage lying off the predetermined range is detected by the DC input voltage detector, and permits power supply to the discharge lamp upon reception of a signal indicating that the DC input voltage has returned within that range.

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