Lamp lighting apparatus

Details Lamp lighting apparatus Lamp lighting apparatus

2007-03-30

2009-12-15

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

C315S219000, C315S246000, C315S260000, C315S224000

Reexamination Certificate

active

07633236

ABSTRACT:
A lamp lighting apparatus comprises a glass tube, electrodes provided in an axis direction of the glass tube, and an inverter circuit which apply a high voltage of an alternating current to the electrodes. The inverter circuit includes an inverter control circuit which outputs a switching element operating signal, a switching element circuit which converts a direct current voltage into an alternating voltage by ON/OFF controlling the switching element according to the switching element operating signal, and a boosting transformer which boosts the alternating voltage from the switching circuit. In the lighting apparatus, a frequency of the switching element operating signal is higher than that in a steady state operating period, during at least part of period from a beginning of lighting according to the burst light control until the lamp emits light entirely, approximately in the axis direction of the lamp.

REFERENCES:
patent: 6356033 (2002-03-01), Okamoto et al.
patent: 6445137 (2002-09-01), Okamoto et al.
patent: 6646391 (2003-11-01), Okamoto et al.
patent: 6850016 (2005-02-01), Oda et al.
patent: 7397199 (2008-07-01), Kobayashi
patent: 2007/0115088 (2007-05-01), Sugioka
patent: 06-163008 (1994-06-01), None
patent: 3149780 (2001-01-01), None
patent: 2004-510302 (2004-04-01), None

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