Lamp driving device having impedance component detecting...

Details Lamp driving device having impedance component detecting... Lamp driving device having impedance component detecting...

2011-04-05

2011-04-05

Vo, Tuyet Thi (Department: 2821)

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

With power factor control device

C315S291000, C315S274000, C315S307000, C315S312000

Reexamination Certificate

active

07919929

ABSTRACT:
In one aspect, an impedance component which exhibits a high impedance in a high frequency region is arranged on a high pressure line formed on a secondary side of a transformer. The potential difference generated at both ends of the impedance component is used to detect an abnormal electrical discharge generated in the high pressure line. When the abnormal electrical discharge is detected, a switching operation is stopped by a controlling circuit whereby a protection operation is performed.

REFERENCES:
patent: 6949893 (2005-09-01), Higuchi
patent: 2004/0217719 (2004-11-01), Higuchi
patent: 2004/0251851 (2004-12-01), Maishima
patent: 2006/0038513 (2006-02-01), Henry
patent: 3123161 (2000-10-01), None
patent: 2002-151287 (2002-05-01), None
patent: 2004-135489 (2004-04-01), None

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