High pressure discharge lamp lighting apparatus

Details High pressure discharge lamp lighting apparatus High pressure discharge lamp lighting apparatus

2007-03-30

2008-11-04

Owens, Douglas W. (Department: 2821)

Electric lamp and discharge devices: systems

Discharge device and/or rectifier in the supply circuit

Flashers

C315S2090SC

Reexamination Certificate

active

07446482

ABSTRACT:
A high pressure discharge lamp lighting apparatus comprises a high pressure discharge lamp including a discharge container made of quartz glass in which mercury and halogen is enclosed, and a first and second electrodes in which the first electrode is larger than the second electrode in size and face each other, a power supply section which turns on the discharge lamp by impressing a voltage of opposite polarity by turns between the pair of electrodes of the high pressure discharge lamp. In the lamp lighting apparatus, a control is carried out by the power supply section, so that a first period during which a positive voltage is impressed to the first electrode is longer than a second period during a positive voltage is impressed to the second electrode.

REFERENCES:
patent: 6850015 (2005-02-01), Ishizuka et al.
patent: 6927539 (2005-08-01), Arimoto et al.
patent: 7015655 (2006-03-01), Kamoi et al.
patent: 7077530 (2006-07-01), Chen et al.
patent: 7116053 (2006-10-01), Claus et al.
patent: 7239089 (2007-07-01), Suzuki et al.
patent: 2005/0151471 (2005-07-01), Morimoto
patent: 2004-172086 (2004-06-01), None

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