System and method for preventing acoustic arc resonance in a...

Details System and method for preventing acoustic arc resonance in a... System and method for preventing acoustic arc resonance in a...

2006-08-01

2006-08-01

Tran, Thuy V. (Department: 2821)

Electric lamp and discharge devices: systems

Regulation of the control current and/or potential applied...

C315S291000, C315S247000

Reexamination Certificate

active

07084578

ABSTRACT:
A method of preventing acoustic arc resonance (AAR) in a high frequency electronic ballast for a High-Intensity-Discharge (HID) lamp, includes the step of providing a phase modulated signal to the HID lamp, the phase modulated signal being provided by a pulse source working at a Pulse-Phase-Modulation (PPM) mode with a fixed frequency.

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patent: 6750620 (2004-06-01), Suzuki
patent: 6791286 (2004-09-01), Matsumoto
patent: 2002/0041165 (2002-04-01), Cammack

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