Discharge lamp lighting circuit with protection circuit

Details Discharge lamp lighting circuit with protection circuit Discharge lamp lighting circuit with protection circuit

1998-01-14

2000-07-11

Shingleton, Michael B

Electric lamp and discharge devices: systems

Special application

Vehicle

315307, 315DIG7, 315225, B60Q 102

Patent

active

060877766

ABSTRACT:
A discharge lamp lighting circuit which, in turning on a discharge lamp, when an abnormal condition occurs in a discharge lamp or in the present discharge lamp lighting circuit due to a transient cause, can resume the power supply to the discharge lamp at the time when the present transient abnormal condition cause disappears. The discharge lamp lighting circuit includes lighting control for controlling the lighting of a discharge lamp, an abnormal condition detector for detecting an abnormal condition occurring in the discharge lamp or in the discharge lamp lighting circuit, and a protection circuit which receives a signal from the abnormal condition detector to thereby stop the power supply to the discharge lamp. The protection circuit is composed of first protection unit and second protection unit. When a permanent abnormal condition is detected in the discharge lamp or in the discharge lamp lighting circuit, the power supply to the discharge lamp is cut off by the first protection unit and such cutoff condition of the power supply is also held. Also, when a transient abnormal condition is detected in the discharge lamp or in the discharge lamp lighting circuit, the power supply to the discharge lamp is cut off by the second protection unit and, after then, when the present abnormal condition is no longer detected, the power supply cutoff condition is removed to thereby resume the power supply to the discharge lamp. Further, while the power supply to the discharge lamp is being cut off by the second protection unit, the operation of the first protection unit is prevented from cutting off the power supply to the discharge lamp and holding such power supply cutoff condition.

REFERENCES:
patent: 5068570 (1991-11-01), Oda et al.
patent: 5140229 (1992-08-01), Yagi et al.
patent: 5142203 (1992-08-01), Oda et al.
patent: 5151631 (1992-09-01), Oda et al.
patent: 5177397 (1993-01-01), Nagasawa et al.
patent: 5212428 (1993-05-01), Sasaki et al.
patent: 5278452 (1994-01-01), Matsumoto et al.
patent: 5295036 (1994-03-01), Yagi et al.
patent: 5422548 (1995-06-01), Yamashita et al.
patent: 5438480 (1995-08-01), Yamashita
patent: 5449973 (1995-09-01), Yamashita et al.
patent: 5485059 (1996-01-01), Yamashita et al.
patent: 5486740 (1996-01-01), Yamashita et al.
patent: 5514935 (1996-05-01), Oda et al.
patent: 5565743 (1996-10-01), Yamashita et al.
patent: 5572094 (1996-11-01), Yamashita et al.
patent: 5629588 (1997-05-01), Oda et al.
patent: 5663613 (1997-09-01), Yamashita et al.
patent: 5751115 (1998-05-01), Jayaraman et al.

Affiliated with

Also associated with

Rating

Discharge lamp lighting circuit with protection circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Discharge lamp lighting circuit with protection circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Discharge lamp lighting circuit with protection circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-545142