Electric lamp and discharge devices: systems – Confined gas or vapor-type load device with pressure...
Reexamination Certificate
2006-10-03
2006-10-03
Wong, Don K. (Department: 2163)
Electric lamp and discharge devices: systems
Confined gas or vapor-type load device with pressure...
C315S109000
Reexamination Certificate
active
07116053
ABSTRACT:
A method of stabilizing an arc between electrode tips in a high pressure arc discharge lamp is provided comprising initially creating an arc between the pair of electrodes during a start-up phase of the lamp by supplying power to the lamp for a first period. The method then transitions the arc to attach itself between the tips of the electrodes by removing the power supplied to the lamp for a second period and then resupplying power to the lamp after completion of the second period. The first and second periods for respectively initially supplying and removing power are preferably selected based on either an elapsed period of time, the measured operating lamp voltage, or the measured lamp pressure. Once the arc becomes attached to the tips of the electrodes in this manner, the arc will remain stabilized between the electrode tips during operation of the discharge lamp.
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Claus Holger
Piotrowski Andre
Blanche Bradley D.
Greenberg Traurig LLC
Ushio America, Inc.
Vy Hung Tran
Wong Don K.
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