Method of operating a discharge lamp system and a discharge...

Details Method of operating a discharge lamp system and a discharge... Method of operating a discharge lamp system and a discharge...

2005-08-02

2005-08-02

Tran, Thuy Vinh (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

C315S291000, C315S307000

Reexamination Certificate

active

06924604

ABSTRACT:
A discharge lamp system and method of operating a discharge lamp system in which vertical segregation of vapor phase species is reduced. Lamp power is modulated with an arc-straightening frequency and with a frequency that excites a combination radial plus longitudinal acoustic mode of the lamp. The combination radial plus longitudinal acoustic mode may be a combination first radial mode and nth longitudinal acoustic mode and may be excited with a single power frequency or a swept power frequency range. The two frequencies may be provided at the same time, or separately where the modulation at the arc-straightening frequency is 2 to 16 times longer than a subsequent modulation at the combination radial plus longitudinal acoustic mode.

REFERENCES:
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patent: 6184633 (2001-02-01), Kramer
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patent: 6437517 (2002-08-01), Kramer
patent: 6483259 (2002-11-01), Kramer
patent: 6522089 (2003-02-01), Duong et al.
patent: 6788007 (2004-09-01), Kramer

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